Article Category
Athletic Performance
141 articles
The 45-Year-Old Formula That Predicts Your Race Time More Accurately Than Your Training Pace
The Riegel formula, published in 1977, remains one of the most accurate tools for predicting race times across distances. Here's the math and why most runners misuse it.
4 min read · 2026-10-27
Your 1RM Tells You How Strong You Are. Rate of Force Development Tells You How Explosive You Actually Are.
Rate of force development (RFD) — the speed at which an athlete builds force — is the performance variable that separates equally strong athletes in explosive sports. Maximal strength and RFD are trainable qualities that require different protocols.
5 min read · 2026-10-27
You're Probably Underrecovering — And Training More Isn't Going to Fix It
Stalled performance is almost always a recovery problem misdiagnosed as a training problem. Here's the physiology of supercompensation and what actually drives adaptation.
4 min read · 2026-10-27
The Relative Age Effect: Why Your Birthday Determines Who Gets Scouted
Children born in January are dramatically over-represented in elite youth sport. This is the Relative Age Effect — and it is systematically discarding late-developing talent.
5 min read · 2026-10-27
The Athlete Who Eats Less to Perform Better Is Often the One Whose Performance Deteriorates Fastest.
RED-S — relative energy deficiency in sport — impairs performance across nine physiological systems simultaneously. The threshold is energy availability below 30 kcal per kilogram of fat-free mass per day, and it occurs in both male and female athletes across all sports.
5 min read · 2026-10-27
The 60-Second Rest Period Is the Most Reflexively Applied Recommendation in Resistance Training. The PCr Resynthesis Data Suggests It's Wrong for Most Goals.
Phosphocreatine (PCr) resynthesis reaches only 75% at 90 seconds post-set — the threshold for full replenishment is 3–5 minutes. Schoenfeld 2016 demonstrated that longer rest periods (3 min) produce significantly greater strength and hypertrophy gains than shorter rest (1 min) at equal volume.
5 min read · 2026-10-27
The Adaptogen That Blunts Cortisol Without Dulling Performance: Rhodiola Rosea Explained
Rhodiola rosea reduces perceived effort and cortisol without sedation. Learn what the clinical data actually shows and how to apply it for training and recovery.
5 min read · 2026-10-27
Heart Rate Lies in the Heat, After Illness, and in Overreaching. RPE Has Known This for 50 Years.
Heart rate is a physiological response to multiple variables — not a direct measure of training intensity. In heat, illness, overreaching, and dehydration, heart rate systematically overstates or understates effort. Session RPE captures what heart rate cannot.
5 min read · 2026-10-27
Pre-Cooling Strategies for Hot-Weather Racing: The Protocol
Pre-cooling lowers core temperature before the starting gun — creating a larger thermal reserve before the performance-limiting 38.5°C ceiling is reached. Here's the evidence.
5 min read · 2026-10-20
Pre-Sleep Nutrition: Glycine, Theanine and Overnight Recovery
Three nutritional compounds with controlled trial evidence for improved sleep quality in athletes: glycine (3g), L-theanine (200mg), and tart cherry concentrate (30ml twice daily). The mechanisms are distinct and complementary.
5 min read · 2026-10-20
Probiotics and Post-Exercise Immunity: The Open Window Evidence
Intense endurance exercise creates an immunological open window of 3–72 hours during which URTI risk is elevated. Learn how specific probiotic strains restore mucosal SIgA, reduce illness incidence in athletes, and support immune function without blunting training adaptation.
5 min read · 2026-10-20
Protein and Bone Health: Debunking the Acid-Load Calcium Myth
The acid-ash hypothesis claimed high protein leaches calcium from bones. Fenton 2011 and subsequent meta-analyses demolished this myth. What protein actually does to skeletal health.
5 min read · 2026-10-20
Protein in a Caloric Deficit: Protecting Lean Body Mass
The 1.6g/kg protein recommendation is built for energy balance. Athletes in a caloric deficit face anabolic resistance and elevated muscle protein breakdown that shift the optimal intake to 2.3–3.1g/kg lean body mass — a target most cutting programmes fail to meet.
5 min read · 2026-10-20
Quercetin and Polyphenols: Exercise Adaptation and the Blunting Catch
Quercetin and EGCG activate AMPK and SIRT1 — the same molecular switches as exercise. Here's what the human trial evidence says about performance benefits.
5 min read · 2026-10-20
Block Periodisation After 40: Modifying the Model for Masters Athletes
Masters athletes (40+) show measurably slower neuromuscular recovery, blunted anabolic hormone response, and increased connective tissue vulnerability. Standard 4-week accumulation blocks routinely exceed recovery capacity. Modified block periodisation with shorter mesocycles and higher deload frequency addresses these constraints.
5 min read · 2026-10-13
Phosphatidylserine and Cortisol: Blunting the Post-Training Stress Response
Discover how phosphatidylserine (PS) blunts the cortisol spike after intense training, protecting muscle and accelerating recovery. Evidence reviewed.
5 min read · 2026-10-13
Plant Protein DIAAS: The Score That Replaced PDCAAS for Vegan Athletes
PDCAAS was replaced by DIAAS as the gold standard for protein quality scoring in 2013. Most sports nutrition guidance hasn't caught up — and plant-based athletes are making supplementation decisions based on the outdated framework.
5 min read · 2026-10-13
Polarised vs Pyramidal Training: How Elites Distribute Intensity
Stephen Seiler's research transformed how we think about training intensity. Polarised, pyramidal, and threshold — the data on which distribution produces the fastest adaptations.
5 min read · 2026-10-13
Post-Exercise Hypotension: The 22-Hour Blood Pressure Drop
Post-exercise hypotension (PEH) reduces systolic blood pressure by 5–20 mmHg for up to 22 hours after a single session. The vasodilatory mechanism is well-characterised — producing effects comparable to low-dose antihypertensive medication.
5 min read · 2026-10-13
Postpartum Return to Training: The Nutrition Science Most Athletes Ignore
Returning to sport after childbirth demands more than rest. Breastfeeding adds 500 kcal/day of demand, relaxin persists for months, and iron deficits compound. Here is the evidence.
5 min read · 2026-10-13
Potassium in Ultra-Endurance: The Electrolyte Nobody Discusses
Hypokalemia during ultra-endurance events triggers ECG changes and muscle cramps — but potassium rarely appears on race nutrition briefings. Here's why it should.
5 min read · 2026-10-13
Power Nap for Performance: The 26-Minute NASA Recovery Window
Discover the NASA-validated 26-minute nap protocol that boosts athletic alertness, reaction time, and motor performance without disrupting night sleep.
5 min read · 2026-10-13
NMN and NR for NAD+: Does It Improve Athletic Performance?
NAD+ precursors NMN and NR are trending in sports science. Here's what the actual research says about aerobic capacity, mitochondrial function and recovery.
5 min read · 2026-10-06
Powerlifters Periodise Their Training Across the Year. Most Forget to Periodise Their Nutrition. Here's What an Optimised Strength Nutrition Calendar Looks Like.
Nutrition and training stress interact. Hall 2012 shows >500 kcal surplus accelerates fat not muscle. Helms 2014 raises cut protein to 2.3–3.1g/kg. Here's the year-round framework.
5 min read · 2026-10-06
Omega-3 (EPA/DHA) for Muscle Recovery: Dose and Evidence
Omega-3 fatty acids — specifically EPA and DHA — directly potentiate mTORC1-driven muscle protein synthesis independent of leucine intake. Most athlete nutrition protocols ignore this pathway entirely.
5 min read · 2026-10-06
Open Water Swimmers Are Not Drowning From Hypothermia — They're Dying From Cold Shock. Here's the Difference.
Cold shock — not hypothermia — is the leading cause of open water drowning. Understanding the autonomic response, cold incapacitation, and SIPE gives athletes the knowledge to stay safe.
5 min read · 2026-10-06
Heat Risk for Outdoor Athletes: When Performance Loss Turns Dangerous
Air temperature alone tells you very little about heat stress during exercise. The metric sports medicine uses is WBGT — and most athletes have never heard of it.
5 min read · 2026-10-06
Overtraining Syndrome vs Functional Overreaching: How to Tell Them Apart
Overtraining syndrome (OTS) and functional overreaching (FOR) produce similar symptoms but require opposite responses. Misclassifying FOR as OTS — and reducing load when more recovery alone is insufficient — delays diagnosis and extends impairment.
5 min read · 2026-10-06
Paleo Diet and Athletic Performance: What Paleolithic Athletes Really Ate
The paleo diet's evolutionary logic is genuinely interesting. Its application to trained athletes — who have carbohydrate demands that hunter-gatherers matched through entirely different food sources — is more complex than the popular framing suggests.
5 min read · 2026-10-06
Melatonin for Jet Lag: The Timing Protocol That Actually Works
Melatonin timing is everything. A 1mg dose taken at the right circadian phase outperforms 10mg at the wrong time. For travelling athletes and shift workers, the difference is measurable in performance.
4 min read · 2026-09-29
Menstrual Cycle Training: Follicular vs Luteal Phase Programming
Oestrogen and progesterone fluctuations across the menstrual cycle measurably alter strength, aerobic performance, thermoregulation, injury risk, and recovery timelines. Phase-based training periodisation adapts training intensity and volume to hormonal context rather than applying a uniform weekly structure.
5 min read · 2026-09-29
Mental Fatigue and Performance: The Psychobiological Model Explained
Mental fatigue from work, screens, or decision-making reduces endurance performance by 11–15% via RPE — not by impairing muscles. Here's the mechanism.
5 min read · 2026-09-29
Two Athletes Take Identical Protein Supplements. One Absorbs 40% More Usable Amino Acids Than the Other. The Difference Is Not the Supplement — It Is the Gut Microbiome Processing It.
Your gut microbiome critically determines how much of your protein, omega-3, and micronutrient supplements are actually absorbed. Learn how gut bacteria affect bioavailability, why inter-individual variation is enormous, and what to do about it.
5 min read · 2026-09-29
Barefoot Running Science: What Harvard Got Right — And What the Minimalist Movement Got Wrong
Lieberman's 2010 Nature paper changed how we think about foot strike. But the minimalist running movement missed half the science. Here's what athletes need to know about transitioning safely.
5 min read · 2026-09-29
Nasal Breathing and CO₂ Tolerance: The Performance Evidence
The nose filters, humidifies, and — critically — produces nitric oxide that dilates airways and vasculature. Mouth breathing during submaximal exercise bypasses this system entirely, raising the anaerobic threshold earlier than necessary.
5 min read · 2026-09-29
Natural Muscle Gain Rate: How Much You Can Build Per Year
Lyle McDonald's rate model shows year 1 allows up to 1.1kg/month of lean mass; year 3+ drops to 0.2kg/month. Understanding the diminishing returns curve changes everything about training expectations.
5 min read · 2026-09-29
Gluten-Free Athletes and NCGS: Why 41% Probably Should Not Be
Non-coeliac gluten sensitivity in athletes: Biesiekierski 2011 and 2013, the FODMAP confound, Lis 2015 RCT showing no performance benefit, and the wheat ATI alternative explanation.
5 min read · 2026-09-29
Athletes Are Taking Magnesium for Sleep — But Most Are Using the Wrong Form at the Wrong Time
Magnesium deficiency is the most common micronutrient insufficiency in trained athletes — and its impact on sleep architecture, muscle recovery, and nervous system function is widely underestimated.
5 min read · 2026-09-22
Not All Magnesium Is Equal: Why Threonate Crosses the Blood-Brain Barrier When Glycinate Doesn't
Magnesium L-threonate uniquely increases cerebrospinal fluid magnesium and synaptic density. Here's the evidence hierarchy across magnesium forms and what it means for athlete cognition and recovery.
5 min read · 2026-09-22
Magnesium, TRPM6 and Glucose Uptake: The Overlooked Connection
Magnesium activates the TRPM6 transporter that enables insulin receptor tyrosine kinase signalling. Deficiency impairs GLUT4 translocation and post-exercise glucose uptake. Here's the mechanism athletes need to understand.
5 min read · 2026-09-22
Your 5K Time Doesn't Predict Your Marathon — And Aerobic Decoupling Explains Why
VO2max alone can't predict marathon performance. Aerobic decoupling — the divergence between pace and heart rate over time — is the metric serious marathon runners need to understand.
5 min read · 2026-09-22
Most Marathon Runners Carry Either Too Many Gels or Too Few. The Calculation That Fixes This Takes About 90 Seconds.
Marathon energy gel count depends on finish time, not distance. A 4-hour marathoner needs 8–10 gels at 60g/hr. A 3-hour runner needs 6–7. The calculation is duration × carb rate ÷ gel carb content — and most runners skip it.
5 min read · 2026-09-22
Marine vs Bovine Collagen: Which Source Actually Works for Athletes?
Not all collagen supplements are equal. Marine and bovine sources differ in peptide molecular weight, bioavailability, collagen type, and athletic application. Here's the evidence.
5 min read · 2026-09-22
Massage and Recovery: The Mechanotransduction and PGC-1α Evidence
A 2012 Science Translational Medicine study found massage activates PGC-1α and suppresses NF-κB through mechanical signalling. Here's why sports massage belongs in training recovery science — not the luxury spa category.
5 min read · 2026-09-22
Marathon Age Grading: How WMA Compares a 3:15 at 55 to 2:45 at 28
Age-graded performance factors let masters athletes compare times across age groups using World Masters Athletics tables. Here's the science behind age-adjusted marathon prediction.
5 min read · 2026-09-22
Barry Sears Said 40-30-30. The Mediterranean Diet Says Something Different — And the Data Takes Sides
The Zone Diet promises eicosanoid balance at 40-30-30 macros. The Mediterranean Diet delivers different ratios — and PREDIMED-Plus data on cardiovascular outcomes, inflammation, and performance.
5 min read · 2026-09-22
Melatonin Dose: Why 0.5mg Outperforms 5mg for Athletes
Zeitzer 2000 proved 0.3–0.5mg melatonin is as effective as 3mg for circadian phase-shifting. Most pharmacy doses are 10–100× too high. Here's the receptor pharmacology behind the paradox.
5 min read · 2026-09-22
Iron Deficiency in Runners: Check This Before Blaming Overtraining
Iron deficiency without anaemia is missed by standard blood panels and accounts for a significant proportion of unexplained endurance fatigue. Here's what the research says and what to measure.
5 min read · 2026-09-15
Your Athlete Isn't Burnt Out. Their Thyroid Is Starved of Iron. Here's the Overlooked Mechanism.
Low ferritin doesn't just impair oxygen transport — it starves thyroid peroxidase of its iron cofactor, impairing T4-to-T3 conversion and reducing resting metabolic rate. Here's what coaches and athletes miss.
5 min read · 2026-09-15
Fat Adaptation Is Real — But the Research on Keto and Endurance Performance Is Not What You've Been Told
Ketogenic diets produce genuine physiological adaptations in fat oxidation capacity. Whether those adaptations translate to improved endurance performance depends on which part of the effort curve you're measuring.
5 min read · 2026-09-15
L-Carnitine and Fat Transport: What the Trials Actually Deliver
L-carnitine is essential for fat oxidation via CPT1 — but supplementation fails to raise muscle carnitine without insulin co-ingestion. Stephens Wall 2007, Broad 2005 meta-analysis, TMAO risk.
5 min read · 2026-09-15
LT1, LT2, and MLSS: Why Coaches and Athletes Keep Confusing the Three Thresholds That Define Training Zones
Most coaches teach one lactate threshold. Exercise physiology recognises three distinct metabolic inflection points — and training programmes built on only one of them systematically mismatch effort to adaptation.
5 min read · 2026-09-15
Lightning Risk for Outdoor Athletes: The Evidence-Based Protocol That Could Save Your Life
Lightning kills approximately 2,000 people per year globally. Outdoor athletes are disproportionately represented. The 30-30 rule and NATA protocol explained with the physiology behind survival.
5 min read · 2026-09-15
Macro Timing and Distribution: How Daily Spread Changes the Outcome
Meeting daily macro targets is the floor, not the ceiling. How protein, carbohydrate, and fat are distributed across meals directly influences muscle protein balance, glycogen replenishment, and training adaptation.
5 min read · 2026-09-15
Most Athletes Are Measuring HRV. Most Athletes Are Measuring It Wrong. The Errors That Make Your Morning HRV Score Meaningless — and the Protocol That Makes It Actionable.
Heart rate variability (HRV) is the most accessible objective marker of recovery readiness. Learn the correct RMSSD measurement protocol, how to establish your baseline, what confounders destroy validity, and how HRV-guided training outperforms fixed programming.
5 min read · 2026-09-08
The Intermittent Fasting Mistake That's Silently Undermining Your Training Adaptations
IF works for fat loss and metabolic health — but combining it with strength or endurance training without adjusting the eating window creates a specific problem most coaches miss.
4 min read · 2026-09-08
Intra-Workout Carbohydrate Dose: The 75-Minute Threshold
Intraworkout carbohydrate has minimal benefit under 60–75 minutes. Above that threshold, the dose-response becomes dramatic. Here's the evidence and the protocol.
5 min read · 2026-09-08
Iron Absorption: Haem vs Non-Haem and the Role of Hepcidin
Non-haem iron bioavailability is 1–20% depending on absorption promoters and inhibitors. Hepcidin — the master iron regulator — is elevated for 3–6 hours post-exercise, blocking intestinal iron absorption. Knowing this changes supplementation timing completely.
5 min read · 2026-09-08
Athletes Have Been Using Glycaemic Index Wrong for 40 Years
GI was developed for diabetes management, not sport. Here's how glycaemic load reframes carbohydrate strategy for performance athletes — and when GI actually matters.
5 min read · 2026-09-01
Glycerol Hyperhydration: The Pre-Race Fluid Loading Protocol
Glycerol hyperhydration can expand plasma volume by 400–700 mL before heat racing. Here's the science behind this underused protocol and how to apply it safely.
5 min read · 2026-09-01
Glycogen Depletion and the Bonk: The Carbohydrate Maths That Prevents It
The bonk — sudden catastrophic fatigue in endurance sport — is driven by hypoglycaemia and glycogen depletion triggering the central governor's protective shutdown. Exogenous carbohydrate from gels prevents it by maintaining plasma glucose and sparing muscle glycogen.
5 min read · 2026-09-01
Elite Endurance Athletes Have a Measurably Different Gut. Here's What's in It — and Why It Matters.
Elite marathon runners carry significantly higher concentrations of Veillonella atypica — a bacterium that converts exercise-produced lactate into propionate, an additional fuel source. The gut microbiome is now a measurable performance variable.
5 min read · 2026-09-01
The Most Underused Component of Endurance Race Preparation Is Not a Training Session. It Is Practising Your Nutrition Protocol in Training — and Most Athletes Never Do It.
GI distress causes 30–50% of DNFs in ultramarathon events and is the most common non-musculoskeletal reason for performance decline in long-course triathlon. The gut is trainable — and training it requires deliberate practice with race-day nutrition protocols during training.
5 min read · 2026-09-01
Haemochromatosis in Athletes: When Iron Supplementation Turns Dangerous
While iron deficiency gets all the attention in endurance sport, hereditary haemochromatosis causes iron overload in 1 in 200 people. Here's what athletes need to know.
5 min read · 2026-09-01
Heat Acclimatisation: Plasma Volume Expansion and Cool-Weather Carryover
Two weeks of exercise-heat exposure expands plasma volume by 10–12%, lowers core temperature onset threshold for sweating, and reduces heart rate at equivalent workloads. These adaptations improve performance in both hot and temperate conditions.
5 min read · 2026-09-01
Heat Stress and Gut Permeability: What Happens Above 39°C
Exercise heat stress disrupts intestinal tight junctions, triggering LPS endotoxaemia that drives systemic inflammation and exertional heat stroke risk. Learn the I-FABP marker, splanchnic vasoconstriction mechanism, and evidence-based gut protection strategies.
5 min read · 2026-09-01
Heat-Adjusted Race Prediction: What Summer Does to Your Marathon Pace
Race performance degrades predictably with temperature. A 3:30 marathoner can expect to lose 10–20 minutes in warm conditions. Here's the physiological mechanism.
5 min read · 2026-09-01
Exogenous Ketones: What the Evidence Actually Shows for Athletic Performance
Ketone esters and salts are marketed as a fourth fuel source for athletes. The evidence is mixed, nuanced, and training-status dependent. Here is what Cox, Holdsworth and Dearlove actually found.
5 min read · 2026-08-25
First Energy Gel Timing: When to Take It in an Endurance Race
The optimal window for a first race gel is 20–30 minutes in — not at the gun, not when hunger signals arrive. Hunger is a lagging indicator of glycogen depletion, and by the time you feel it, your pace has already started to decline.
5 min read · 2026-08-25
Foam Rolling Before a Run Does Not Improve Performance. But the Runners Who Skip It Pay a Different Price — and the Science Explains Both Sides of That Trade-Off.
Foam rolling produces measurable acute ROM improvements without strength loss — but the mechanism is neurological, not structural. Learn what the evidence shows about foam rolling for runners: when it helps, when it doesn't, and the optimal protocol.
5 min read · 2026-08-25
Genetic Potential and Trainability: What the HERITAGE Study Found
The HERITAGE Family Study trained 481 subjects identically for 20 weeks. VO2max gains ranged from 0% to 100%. The reason is gene-environment interaction — and it changes how we think about genetic potential.
5 min read · 2026-08-25
Glutamine and Immunity: The Amino Acid Endurance Athletes Deplete
Glutamine drops 20–30% after prolonged exercise, suppressing lymphocyte activity and URTI resistance. Here's the science and how dietary protein protects immunity.
5 min read · 2026-08-25
Glucose-Fructose Gels: Breaking the 60g Carb Absorption Ceiling
SGLT1 saturates at 60g/hr of glucose regardless of intake. Adding fructose engages GLUT5 — a separate transporter — allowing total carbohydrate absorption to reach 90g/hr. Only gels formulated with a 2:1 glucose:fructose ratio achieve this.
5 min read · 2026-08-18
Early Specialisation in Youth Sport: The Dropout Evidence
Early sport specialisation before puberty triples overuse injury risk and is linked to higher burnout rates. The research case for delayed specialisation and multisport youth development.
5 min read · 2026-08-18
Nordic Hamstring Curl: The Eccentric Exercise That Cuts Injury Risk 51%
The Nordic hamstring curl reduces hamstring strain injury by 51%. Here is the eccentric overload science and how to integrate it into any strength programme.
5 min read · 2026-08-18
Electrolytes for Endurance: Why Drinking More Water Makes It Worse
Hyponatraemia — dangerously low blood sodium — is more common in endurance events than most athletes realise. And it's almost always caused by drinking too much plain water, not too little.
5 min read · 2026-08-18
Energy Gels vs Real Food in Ultra-Endurance Events: The Physiology Is Identical. The Practical Differences Are Not.
A banana and a 25g carbohydrate gel produce the same glucose response — the transporter physiology is identical. But real food in ultra-endurance events solves problems gels create: palate fatigue, appetite suppression, and psychological satiety at hour 8+.
5 min read · 2026-08-18
Taking an Energy Gel Without Water Isn't Just Uncomfortable — It Physiologically Delays the Carbohydrate Reaching Your Muscles. Here Is Exactly Why.
Energy gels are hypertonic solutions (600–900 mOsm/L) compared to plasma (290 mOsm/L). Without water, a gel creates an osmotic gradient that draws fluid into the intestinal lumen — slowing absorption, causing bloating, and triggering the nausea that ends races.
5 min read · 2026-08-18
Exertional Rhabdomyolysis: The Training Day That Destroys Kidneys
Exertional rhabdomyolysis sends thousands of athletes to hospital annually. Understand the triad of risk factors, the cola-urine warning sign, and the CK threshold that demands immediate action.
5 min read · 2026-08-18
CYP1A2 Caffeine Genetics: Why Identical Doses Give Different Results
Caffeine half-life ranges from 1.5 to 9.5 hours in the general population — driven almost entirely by a single genetic variant. Most caffeine protocols are built as if this variability doesn't exist.
5 min read · 2026-08-11
Dehydration and Strength: 2% Body Weight Loss Costs Up to 8%
Dehydration of 1.5–2% body weight reduces muscular strength by 4–8% and endurance capacity by more. Here is the neuromuscular physiology and hydration protocol.
5 min read · 2026-08-11
Deload Week: The Supercompensation Science of Training Less
A deload is not a rest week. It is a timed intervention that triggers supercompensation. The physiology of deload timing, depth, and how to distinguish it from tapering.
5 min read · 2026-08-11
Muscle Memory and Myonuclei: The Cellular Mechanism of Retraining
Muscle fibres that have previously hypertrophied retain extra myonuclei even after atrophy from detraining. These persistent nuclei — the cellular basis of muscle memory — allow trained athletes to regain lost mass significantly faster than untrained individuals building from zero.
5 min read · 2026-08-11
The Dietary Inflammatory Index: Is Your Diet Fuelling Recovery or Systemic Inflammation?
The Dietary Inflammatory Index scores your diet on a -9 to +8 scale. Athletes with high-DII diets show elevated hs-CRP, impaired recovery, and blunted adaptation. Here is how to fix it.
5 min read · 2026-08-11
Dietary Nitrate and Beetroot Juice: The Nitric Oxide Performance Evidence
Dietary nitrate from beetroot reduces the oxygen cost of exercise by 3–5% and improves time-to-exhaustion by up to 16–22%. The mechanism is bacterial conversion of nitrate to nitrite to nitric oxide in the oral cavity — which means mouthwash before competition eliminates the entire benefit.
5 min read · 2026-08-11
You Might Be Eating Enough Protein — But Not Absorbing Enough. Digestive Enzymes Explain the Gap.
Protease supplementation, HCl production, and brush border enzyme activity determine how much dietary protein actually reaches muscle tissue. Here's the science athletes often miss.
5 min read · 2026-08-11
Curcumin Bioavailability and DOMS: Why Delivery Form Decides Everything
Standard curcumin has under 1% bioavailability. Learn which delivery forms actually work for NF-κB suppression, DOMS reduction, and collagen support in athletes.
5 min read · 2026-08-04
Cyclical Keto for Hybrid Athletes: Getting Fat Adaptation Without Sacrificing High-Intensity Power
The cyclical ketogenic diet uses periodic carbohydrate refeeds to restore glycogen for high-intensity training while preserving fat-adaptation benefits. Here's the evidence and the protocol.
5 min read · 2026-08-04
Compression Tights: Legitimate Recovery Tool or Expensive Placebo?
Born 2013 reviewed 18 RCTs on compression garments. The results are more nuanced than the marketing suggests — here's what actually works and why.
5 min read · 2026-07-28
Concurrent Training Interference: AMPK, mTOR and Session Order
Endurance training activates AMPK, which phosphorylates and inhibits mTORC1 — the primary trigger for muscle protein synthesis and strength adaptation. Wilson's 2012 meta-analysis quantified the interference: strength gains are 35% smaller and lean mass gains are lower when endurance training is added to resistance training within the same session.
5 min read · 2026-07-28
Copper, Ceruloplasmin and Iron: Why Supplements Do Not Raise Ferritin
Copper deficiency silently impairs iron metabolism. Without adequate ceruloplasmin, iron cannot leave storage or be incorporated into haemoglobin — regardless of how much you supplement.
5 min read · 2026-07-28
Cortisol Awakening Response: What It Means for Morning Training
The cortisol awakening response rises 50–160% within 30 minutes of waking. For athletes training in the morning, this hormonal context shapes adaptation, readiness and injury risk.
5 min read · 2026-07-28
Chronotype and Optimal Training Time: 6am vs 6pm Hormonal Profiles
Chronotype determines when your hormonal, neuromuscular, and cardiovascular systems peak. Learn how diurnal variation affects strength output, VO2max, and injury risk — and how to align your training schedule with your biological performance window.
5 min read · 2026-07-21
Chrono-Nutrition: Why Your Circadian Clock Cares When You Eat
Same calories, same macros, different timing — and the outcomes diverge. Chrono-nutrition explains why your circadian clock controls metabolic efficiency.
5 min read · 2026-07-21
Cluster Sets: Intraset Rest for More Volume at a Higher Load
Cluster sets use intraset rest intervals to maintain bar velocity and neural drive at heavy loads. Here's how this method outperforms traditional straight sets for strength development.
5 min read · 2026-07-21
Coeliac Disease in Athletes: The Silent Deficiency That's Wrecking Performance
Coeliac disease causes villous atrophy that blocks iron, B12, folate, and calcium absorption. Many athletes are undiagnosed for years. Here's the nutritional science and performance impact.
5 min read · 2026-07-21
Adults Have Brown Fat. Cold Exposure Activates It. Here Is What That Actually Does to Body Composition.
Brown adipose tissue in adults burns energy through UCP1 uncoupling. Here is what cold exposure actually does to body composition and metabolic rate in athletes.
5 min read · 2026-07-21
Cold Water Immersion Recovers You Faster. It Also Blunts Hypertrophy. Here's When Each Outcome Matters.
Cold water immersion reduces DOMS and accelerates perceived recovery — but suppresses myofibrillar protein synthesis for up to 48 hours post-immersion. The decision to use CWI is a context-dependent trade-off, not a universal recovery tool.
5 min read · 2026-07-21
Cold Weather Exercise Physiology: How Winter Works Against You
Cold weather exercise reduces muscle power output at 2.5% per degree Celsius, increases breathing cost 10-15%, and triggers cold-induced diuresis. Understanding the physiology prevents both underperformance and danger.
5 min read · 2026-07-21
Collagen DIAAS Is Zero: Why Athletes Should Still Take It
Collagen contains no leucine and cannot stimulate muscle MPS. Yet it significantly boosts tendon collagen synthesis via a separate pathway. Here's the science behind the dual-supplement strategy.
5 min read · 2026-07-21
Collagen for Joint Health: Dosing, Timing and the Evidence Base
Collagen supplements are often dismissed as wellness marketing. But the specific protocol with evidence — gelatin + vitamin C, taken 60 minutes before exercise — is mechanistically distinct from general collagen powder use.
4 min read · 2026-07-21
Your Pre-Workout Caffeine Isn't Working — And the Reason Is More Interesting Than Tolerance
Caffeine tolerance reduces the ergogenic effect dramatically in habitual users — but the mechanism isn't what most athletes think. The dose, timing window, and cycling strategy determine whether it works at all.
5 min read · 2026-07-14
Caffeine Washout Before a Race: The Sensitivity Reset Protocol
Regular caffeine users blunt their own ergogenic advantage. A structured pre-competition washout protocol restores adenosine receptor sensitivity — maximising race-day caffeine effect.
5 min read · 2026-07-14
Carbohydrate Loading Is Not Just 'Eating More Pasta'. The Protocol That Actually Maximises Race-Day Glycogen.
Muscle glycogen capacity is approximately 400–600g in trained athletes — but most reach race day at 60–70% of that ceiling. The modified carbohydrate loading protocol from Bergström 1967 onwards can push glycogen stores to true ceiling in 36–48 hours.
5 min read · 2026-07-14
Carbon Plate Shoes and Running Economy: What Makes Them Faster
Carbon plate shoes improved marathon times by up to 4%. But what is the actual biomechanical mechanism — and does the benefit apply to all runners?
5 min read · 2026-07-14
Central Fatigue: How Tryptophan and Serotonin Stop You, Not Your Legs
Eric Newsholme's central fatigue hypothesis links endurance performance to brain serotonin synthesis. Here's the mechanism and what it means for your nutrition strategy.
5 min read · 2026-07-14
CGM for Athletes: What Postprandial Glucose Actually Tells You
Elite athletes are using CGM devices to reveal wildly different glucose responses to the same foods. The science of postprandial glucose variability and what it means for fuelling.
5 min read · 2026-07-14
Chews vs Gels vs Liquid Carbohydrate: Which Fuelling Format Wins on Race Day?
Energy chews, gels, and carbohydrate drinks all supply race fuel — but their gastric emptying rates, palatability profiles, and practical applications differ significantly. Here's the science.
5 min read · 2026-07-14
Plant-Based Athletes Optimising Omega-3 Through Chia Are Getting a Worse Deal Than They Think
The FADS2 enzyme bottleneck means ALA from chia and flaxseed converts poorly to EPA and DHA. Here's what plant-based athletes actually need for omega-3 sufficiency.
5 min read · 2026-07-14
The Forgotten Mineral That Lowers SHBG and Raises Free Testosterone
Boron reduces SHBG, increases free testosterone, and potentiates vitamin D activation. Learn the evidence, food sources, and optimal supplementation protocol.
5 min read · 2026-07-07
Bovine Colostrum and Athlete Immunity: What the Evidence Shows
Bovine colostrum contains growth factors, immunoglobulins and lactoferrin. Here's what the clinical evidence says about its effects on athlete immunity and performance.
5 min read · 2026-07-07
Box Breathing and HRV: Training Your Resonance Frequency
Breathing at 0.1 Hz resonance frequency dramatically amplifies baroreflex sensitivity and HRV. Here's the protocol athletes are using to regulate pre-competition arousal.
5 min read · 2026-07-07
Caffeinated Energy Gels Work Best in the Second Half of a Race — But Most Athletes Use Them Earliest. The Adenosine Science Behind Why Timing Is Everything.
Caffeine's ergogenic effect in endurance racing is most powerful when adenosine accumulation peaks — the second half of long events. Front-loading caffeinated gels wastes the effect and risks exceeding 400mg total dose across a race.
5 min read · 2026-07-07
Is Caffeine a Diuretic? The Hydration Myth, Tested
Armstrong 2002 and Killer 2014 both confirmed coffee hydrates as well as water. The caffeine diuretic myth persists in sport — here's what the evidence actually shows.
5 min read · 2026-07-07
Caffeine Sleep Cut-Off: Why 6 Hours Is Not Enough for Half of People
Caffeine consumed 6 hours before sleep reduces total sleep time by approximately 1 hour — but suppresses slow-wave sleep (the most restorative stage) even in subjects who fall asleep normally. The mechanism and individual variation have direct implications for athlete recovery.
5 min read · 2026-07-07
Caffeine and Strength: The Neural Priming Effect Beyond Alertness
Caffeine raises motor cortex excitability and calcium sensitivity to deliver a 2–6% acute strength boost. Discover the neural mechanism and optimal dosing strategy.
5 min read · 2026-07-07
The Athlete's Heart: Why Your Enlarged Cardiac Chambers Are a Feature, Not a Bug
Endurance training enlarges the heart. The athlete's heart is not a pathology — it's the most efficient cardiovascular adaptation in human physiology. Here's how it works.
5 min read · 2026-06-30
BCAA vs EAA: Why Branched-Chain Aminos Alone Cost You Muscle
BCAAs trigger a partial MPS signal. EAAs complete it. Here's what the science says about why branched-chain amino acids alone are not enough — and what to use instead.
5 min read · 2026-06-30
BDNF and Exercise: The Neurogenesis Mechanism, Specified
Brain-derived neurotrophic factor (BDNF) — the molecular mediator of exercise-induced neurogenesis — rises acutely with aerobic exercise and produces lasting structural changes in the hippocampus. The dose-response relationship and intensity threshold are now well characterised.
5 min read · 2026-06-30
Berberine for Athletes: AMPK, Glucose Control and the Metformin Comparison
Berberine activates AMPK and improves insulin sensitivity with clinical evidence rivalling metformin. Here's how it applies to body composition and athletic performance.
5 min read · 2026-06-30
Beta-Alanine and Carnosine: The Buffer That Delays High-Intensity Failure
Intramuscular acidosis — the accumulation of H⁺ ions during anaerobic glycolysis — is a primary limiter in efforts lasting 1–10 minutes. Beta-alanine supplementation increases muscle carnosine, the principal intracellular buffer. Here is the mechanism and protocol.
5 min read · 2026-06-30
Biphasic and Segmented Sleep: Should Athletes Split the Night?
Pre-industrial humans slept in two distinct phases separated by a waking hour. Modern chronobiology research reveals what this means for athlete recovery and hormonal restoration.
5 min read · 2026-06-30
BMR Prediction Equations: Why They Are Wrong for 20% of People
Every TDEE calculator uses a prediction equation for basal metabolic rate. Every prediction equation has a population-level error of ±10–15%. For an athlete consuming 3,500 kcal/day, that's a potential daily error of 350–525 kcal — the equivalent of a full meal disappearing from the calculation.
5 min read · 2026-06-30
Why Body Fat Percentage Is a More Useful Health Marker Than BMI — and How to Measure It Without Expensive Equipment
BMI misclassifies approximately 30% of adults with metabolically unhealthy body composition. Body fat percentage, measured correctly, tells a more accurate story — and you don't need a clinic to get it.
5 min read · 2026-06-30
Alcohol and Women Athletes: Why the Same Drink Means 30% Higher BAC
Female athletes reach 30–40% higher BAC from identical alcohol intake due to gastric ADH differences, lower total body water, and hormonal enzyme interactions. Here's the evidence.
5 min read · 2026-06-23
Altitude Masks and VO₂max: What They Actually Train Is Your Breathing
Elevation training masks do not lower blood oxygen saturation or simulate altitude. But they do train inspiratory muscles — and that IS a real ergogenic. Here's the science.
5 min read · 2026-06-23
Altitude Training: The Hypoxia Physiology Behind 4 Weeks at 2,400m
Altitude training is among the most scientifically validated performance tools in endurance sport. The physiology of why it works — and why the timing of sea-level competition matters more than the altitude itself — is still poorly applied in practice.
5 min read · 2026-06-23
Acute Mountain Sickness: Why Fit Athletes Collapse Above 3,000m
AMS strikes fit athletes as hard as beginners. Learn the Lake Louise score, acetazolamide protocol, and ascent rate science that keeps you performing at altitude.
5 min read · 2026-06-23
Android vs Gynoid Fat: Why Where You Store Fat Matters More Than How Much You Have
Two athletes with identical body fat percentages can have dramatically different cardiometabolic risk profiles. The difference lies in fat distribution: android (abdominal) vs gynoid (hip-thigh).
5 min read · 2026-06-23
Vitamin C and Collagen Synthesis: Why Antioxidant Timing Matters
Vitamin C is an essential cofactor for collagen synthesis — but timing and dose determine whether it helps or hinders. Learn the Shaw protocol, prolyl hydroxylase mechanism, the ROS double-edged sword, and the evidence for pre-exercise vitamin C + gelatin.
5 min read · 2026-06-23
Blue Light and Athlete Sleep: The 90-Minute Melatonin Delay
Blue light from screens delays melatonin onset by 60–90 minutes and reduces total sleep time. For athletes, that suppression window is their primary recovery period.
5 min read · 2026-06-23
Ashwagandha (KSM-66) and Cortisol: The RCT Evidence in Athletes
KSM-66 ashwagandha is one of very few adaptogens with proper randomised controlled trial data in athletes. Here is what the cortisol, strength and VO2max research actually shows.
5 min read · 2026-06-23
Athlete Retirement Planning: Why Peak Earning Years Get Wasted
Studies consistently show 60–80% of professional athletes face significant financial difficulties within five years of retirement. The cause is not spending. It is the mismatch between athletic career economics and conventional financial planning timelines.
5 min read · 2026-06-23
ACL Injury Prevention: The 20-Minute Neuromuscular Programme That Works
ACL prevention programmes reduce tear incidence by 50–88%. Hewett 2005 valgus collapse predictor, PEP programme Mandelbaum 2005, FIFA 11+, and the neuromuscular strength qualities that protect the joint.
5 min read · 2026-06-16
Active Recovery at 35–40% VO₂max Clears Lactate Three Times Faster Than Rest. Here Is Why It Works.
Active recovery at low intensity clears blood lactate 3× faster than passive rest. Here is the physiology and how to structure inter-session and between-bout recovery.
5 min read · 2026-06-16
ACTN3 Genotype and Muscle Fibre Type: Sport Genomics' Strongest Finding
The ACTN3 R577X polymorphism is the most studied sports genomics variant — affecting Type IIx muscle fibre expression and influencing sprint vs endurance phenotype. Learn what the evidence shows about fibre type genetics, testing limitations, and training modifiability.
5 min read · 2026-06-16
The Autoimmune Protocol (AIP) Diet: What Athletes With Inflammatory Conditions Need to Know
The Autoimmune Protocol (AIP) eliminates immune-triggering foods to calm systemic inflammation. Learn how athletes use it, what the science shows, and when it works.
5 min read · 2026-06-16
Alcohol Clearance: How Long After Drinking Is It Safe to Train?
The body eliminates alcohol at approximately 0.015% BAC per hour — a fixed enzymatic ceiling that caffeine, water, exercise, and sleep cannot accelerate. Understanding the Widmark elimination model tells an athlete exactly when their physiology is ready to train again.
5 min read · 2026-06-16
Alcohol and Tendon Repair: How Two Drinks Sabotage Connective Tissue
Alcohol impairs collagen synthesis at doses most athletes consider moderate. The biochemistry of ethanol's effect on prolyl hydroxylase, fibroblast activity, and tendon repair windows.
5 min read · 2026-06-16
Alcohol Has 7 Calories Per Gram. That's Not Even the Worst Part for Body Composition.
Alcohol's caloric density is the entry point. The bigger issue for athletes is how ethanol disrupts substrate oxidation, fat storage, and recovery — effects that persist well beyond the BAC returning to zero.
5 min read · 2026-06-16
Alcohol and Athletic Performance: What a Few Drinks Do to Recovery
Most athletes know alcohol isn't ideal for recovery. Few understand the specific mechanisms — or how little it takes to measurably impair the adaptations from a hard training session.
5 min read · 2026-06-16