Sports Science Evidence Base
Every article is grounded in peer-reviewed research and linked to a relevant calculator — so you can apply the science to your own numbers immediately.
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Health Science
Caffeine Half-Life: Exactly How Long Caffeine Stays in Your System
8 min readCaffeine Half-Life Calculator
Sleep ScienceSleep Cycles Per Night: How Many You Need and Why It Matters
9 min readSleep Cycle Calculator
Performance ScienceVO₂max by Age: Complete Chart, Norms, and What Your Score Means
10 min readVO₂max Calculator
Cycling ScienceFTP Cycling: What Is a Good Score? (W/kg Chart by Ability Level)
9 min readFTP Calculator
Strength Science1RM Percentage Chart: How to Use Your One-Rep Max for Training
9 min read1RM Calculator
Cycling Science1x vs 2x Drivetrain: Gear Range, Cross-Chaining and Efficiency
5 min readCycling Gear Ratio Calculator
Athletic PerformanceACL Injury Prevention: The 20-Minute Neuromuscular Programme That Works
5 min read1RM Calculator
Athletic PerformanceActive Recovery at 35–40% VO₂max Clears Lactate Three Times Faster Than Rest. Here Is Why It Works.
5 min readRecovery Need Estimator
Athletic PerformanceACTN3 Genotype and Muscle Fibre Type: Sport Genomics' Strongest Finding
5 min readFor athletes calculating their maximum natural muscle potential from structural measurements — a evidence-based ceiling that doesn't require a genetic test:
Sports ScienceAdaptive Thermogenesis: Why Your Caloric Deficit Stops Working at 8 Weeks
5 min readAdaptive TDEE Calculator — Back-Calculate Your True Maintenance Calories
Athletic PerformanceThe Autoimmune Protocol (AIP) Diet: What Athletes With Inflammatory Conditions Need to Know
5 min readPaleo Diet Macros Calculator
Athletic PerformanceAlcohol Clearance: How Long After Drinking Is It Safe to Train?
5 min readIf you want to calculate an athlete's personal BAC elimination curve — including clearance timeline to zero BAC, rehydration window, and sleep quality impact by drink count and body weight:
Athletic PerformanceAlcohol and Tendon Repair: How Two Drinks Sabotage Connective Tissue
5 min readCollagen Dosage for Joints
Athletic PerformanceAlcohol Has 7 Calories Per Gram. That's Not Even the Worst Part for Body Composition.
5 min readIf you want to calculate the exact caloric load and ethanol content from your weekly drinking pattern — and see how it maps against your fat loss deficit:
Athletic PerformanceAlcohol and Athletic Performance: What a Few Drinks Do to Recovery
5 min readIf you want to understand how quickly your body metabolises alcohol based on weight, sex, drink count, and time — and when you'll be fully cleared:
Athletic PerformanceAlcohol and Women Athletes: Why the Same Drink Means 30% Higher BAC
5 min readAlcohol Metabolism Calculator
Cycling ScienceWhy Your Cycling Calorie Calculator Lies at Altitude — And What to Do About It
5 min readCycling Calorie Calculator
Athletic PerformanceAltitude Masks and VO₂max: What They Actually Train Is Your Breathing
5 min readVO2max Calculator
Athletic PerformanceAltitude Training: The Hypoxia Physiology Behind 4 Weeks at 2,400m
5 min readVO₂ Max Calculator
Athletic PerformanceAcute Mountain Sickness: Why Fit Athletes Collapse Above 3,000m
5 min readOutdoor Safety Risk Calculator
Athletic PerformanceAndroid vs Gynoid Fat: Why Where You Store Fat Matters More Than How Much You Have
5 min readBody Fat Percentage Calculator
Athletic PerformanceVitamin C and Collagen Synthesis: Why Antioxidant Timing Matters
5 min readFor athletes calculating the daily collagen dose and timing protocol for joint and tendon repair — separating the cofactor role of vitamin C from its adaptation-blunting antioxidant effect:
Athletic PerformanceBlue Light and Athlete Sleep: The 90-Minute Melatonin Delay
5 min readMelatonin Timing Calculator
Athletic PerformanceAshwagandha (KSM-66) and Cortisol: The RCT Evidence in Athletes
5 min readRecovery Need Estimator
Athletic PerformanceAthlete Retirement Planning: Why Peak Earning Years Get Wasted
5 min readThe same compound growth mathematics that governs training adaptation applies to long-term financial accumulation — and the athlete's compressed earning window makes starting earlier disproportionately more valuable.
Athletic PerformanceThe Athlete's Heart: Why Your Enlarged Cardiac Chambers Are a Feature, Not a Bug
5 min readHeart Rate Zone Calculator
Athletic PerformanceBCAA vs EAA: Why Branched-Chain Aminos Alone Cost You Muscle
5 min readProtein Intake Calculator
Athletic PerformanceBDNF and Exercise: The Neurogenesis Mechanism, Specified
5 min readFor athletes tracking VO₂max and aerobic fitness levels as a quantifiable target for the exercise dose range associated with sustained BDNF-mediated cognitive benefits:
Athletic PerformanceBerberine for Athletes: AMPK, Glucose Control and the Metformin Comparison
5 min readChronic Disease Nutrition Guide
Athletic PerformanceBeta-Alanine and Carnosine: The Buffer That Delays High-Intensity Failure
5 min readCycling FTP Calculator
Athletic PerformanceBiphasic and Segmented Sleep: Should Athletes Split the Night?
5 min readSleep Cycle Calculator
Strength & MuscleBuilding Muscle at 20% of Your 1RM: The Physiology Behind Blood Flow Restriction Training.
5 min readFor athletes and coaches needing to set accurate BFR working loads based on 20–40% of true 1RM:
Athletic PerformanceBMR Prediction Equations: Why They Are Wrong for 20% of People
5 min readAdaptive TDEE Calculator — Back-Calculate Your True Maintenance Calories
Health ScienceBody Composition Measurement Accuracy: DEXA vs BIA vs Calipers
5 min readIf you want a field-based body fat estimate using circumference measurements — with error range context and the conditions under which the estimate is most accurate:
Athletic PerformanceWhy Body Fat Percentage Is a More Useful Health Marker Than BMI — and How to Measure It Without Expensive Equipment
5 min readIf you want to calculate your body fat percentage using the US Navy circumference method — with body fat category classification and an estimate of your fat-free mass:
Cycling ScienceBone Density in Masters Athletes: Which Sports Protect and Which Do Not
5 min readFor masters athletes assessing their seasonal vitamin D status and sun exposure requirements — a key input in the calcium absorption and bone mineral density equation:
Athletic PerformanceThe Forgotten Mineral That Lowers SHBG and Raises Free Testosterone
5 min readVitamin D Calculator
Athletic PerformanceBovine Colostrum and Athlete Immunity: What the Evidence Shows
5 min readRecovery Need Estimator
Athletic PerformanceBox Breathing and HRV: Training Your Resonance Frequency
5 min readHeart Rate Zone Calculator
Athletic PerformanceCaffeinated 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.
5 min readFor athletes building a timed gel schedule with strategic placement of caffeinated vs non-caffeinated gels across a race:
Athletic PerformanceIs Caffeine a Diuretic? The Hydration Myth, Tested
5 min readCaffeine Half-Life Calculator
Health ScienceCaffeine Accumulation: The Maths of Four Coffees in One Day
5 min readCaffeine Half-Life Calculator
Health ScienceThe 200mg Caffeine Limit in Pregnancy Is Evidence-Based. The Reasoning Behind It Is More Important Than the Number.
5 min readCaffeine Metabolism Tracker
Athletic PerformanceCaffeine Sleep Cut-Off: Why 6 Hours Is Not Enough for Half of People
5 min readFor athletes and coaches calculating optimal sleep timing and wake windows based on sleep cycle completion:
Athletic PerformanceCaffeine and Strength: The Neural Priming Effect Beyond Alertness
5 min readCaffeine Pre-Workout Calculator
Athletic PerformanceYour Pre-Workout Caffeine Isn't Working — And the Reason Is More Interesting Than Tolerance
5 min readIf you want to calculate your optimal caffeine dose based on bodyweight, habitual intake, event duration, and timing — including a cycling protocol to preserve the ergogenic effect:
Athletic PerformanceCaffeine Washout Before a Race: The Sensitivity Reset Protocol
5 min readCaffeine Metabolism Tracker
Cycling ScienceCarb Cycling: Training-Day vs Rest-Day Nutrition for Athletes
5 min readMeal Plan Generator Based on Macros — Free
Athletic PerformanceCarbohydrate Loading Is Not Just 'Eating More Pasta'. The Protocol That Actually Maximises Race-Day Glycogen.
5 min readFor athletes building a carbohydrate-loading meal plan across the 48-hour pre-race window — distributing 9–12g/kg carbohydrate across 5–6 meals at a custom high-carb macro split:
Athletic PerformanceCarbon Plate Shoes and Running Economy: What Makes Them Faster
5 min readRunning Pace Calculator
Athletic PerformanceCentral Fatigue: How Tryptophan and Serotonin Stop You, Not Your Legs
5 min readEnergy Gel Calculator
Athletic PerformanceCGM for Athletes: What Postprandial Glucose Actually Tells You
5 min readMacro Meal Generator
Athletic PerformanceChews vs Gels vs Liquid Carbohydrate: Which Fuelling Format Wins on Race Day?
5 min readEnergy Gel Calculator
Athletic PerformancePlant-Based Athletes Optimising Omega-3 Through Chia Are Getting a Worse Deal Than They Think
5 min readProtein Intake for Muscle Gain
Sports NutritionExercise and Nutrition in Chronic Disease: Why Context Decides Outcome
5 min readIf you want to generate a personalised nutrition protocol for a specific chronic condition — including type 2 diabetes, cardiovascular disease, hypertension, or metabolic syndrome — with macronutrient targets adjusted for activity level and bodyweight:
Athletic PerformanceChronotype and Optimal Training Time: 6am vs 6pm Hormonal Profiles
5 min readSleep Performance Calculator for Athletes
Athletic PerformanceChrono-Nutrition: Why Your Circadian Clock Cares When You Eat
5 min readIntermittent Fasting Window Calculator
Athletic PerformanceCluster Sets: Intraset Rest for More Volume at a Higher Load
5 min read1RM Calculator
Athletic PerformanceCoeliac Disease in Athletes: The Silent Deficiency That's Wrecking Performance
5 min readChronic Disease Nutrition Guide
Cycling ScienceCoggan Power Profiling: What Your Power Curve Says About Your Phenotype
5 min readFTP Calculator
Athletic PerformanceAdults Have Brown Fat. Cold Exposure Activates It. Here Is What That Actually Does to Body Composition.
5 min readAdaptive TDEE Calculator — Back-Calculate Your True Maintenance Calories
Athletic PerformanceCold Water Immersion Recovers You Faster. It Also Blunts Hypertrophy. Here's When Each Outcome Matters.
5 min readFor coaches quantifying training stress and deciding when recovery intervention vs adaptation protection should take priority:
Athletic PerformanceCold Weather Exercise Physiology: How Winter Works Against You
5 min readOutdoor Safety Risk Calculator
Athletic PerformanceCollagen DIAAS Is Zero: Why Athletes Should Still Take It
5 min readCollagen Dosage for Joints
Athletic PerformanceCollagen for Joint Health: Dosing, Timing and the Evidence Base
4 min readIf you want to calculate your personalised collagen dosing based on bodyweight, injury history, and training load — including timing guidance for the pre-exercise protocol:
Cycling ScienceCompact vs Standard Chainring: Which Gearing Suits Sportive Riders
5 min readCycling Gear Ratio Calculator
Cycling ScienceCompound Interest in Athletic Development: Why 1% Gains Beat Overhauls
5 min readThe same mathematics that governs compound interest in investing governs training adaptation accumulation — consistent marginal gains compound non-linearly, and reversal events cost disproportionately.
Athletic PerformanceCompression Tights: Legitimate Recovery Tool or Expensive Placebo?
5 min readRecovery Need Estimator
Athletic PerformanceConcurrent Training Interference: AMPK, mTOR and Session Order
5 min readRecovery Need Estimator
Sports ScienceConjugate Periodisation (Westside): Training Two Qualities at Once
5 min readOne Rep Max (1RM) Calculator
Athletic PerformanceCopper, Ceruloplasmin and Iron: Why Supplements Do Not Raise Ferritin
5 min readIron Needs Calculator
Athletic PerformanceCortisol Awakening Response: What It Means for Morning Training
5 min readSleep Cycle Calculator
Cycling ScienceEvery Road Bike Ships With the Wrong Crank Length for Most Riders
5 min readCycling Gear Ratio Calculator
Athletic PerformanceCurcumin Bioavailability and DOMS: Why Delivery Form Decides Everything
5 min readRecovery Need Estimator
Athletic PerformanceCyclical Keto for Hybrid Athletes: Getting Fat Adaptation Without Sacrificing High-Intensity Power
5 min readKeto Macro Calculator
Cycling ScienceCycling Aerodynamics: How CdA Converts Power Into Speed
5 min readCycling Calorie Calculator
Cycling ScienceCycling Calories and Fuelling: The Calculation Most Riders Get Wrong
5 min readIf you want to calculate your actual calorie expenditure for a specific ride based on power output, rider weight, elevation, and drafting conditions:
Cycling ScienceLong Ride Fuelling: The Gel Protocol That Prevents the Bonk
5 min readFor cyclists calculating gel requirements and a timed fuelling schedule for long training rides and events — ensuring carbohydrate intake matches expenditure rate before the glycogen depletion threshold is crossed:
Athletic PerformanceCYP1A2 Caffeine Genetics: Why Identical Doses Give Different Results
5 min readIf you want to model your personal caffeine clearance curve based on metaboliser type (fast/intermediate/slow), dose, and timing — including when caffeine concentration drops below sleep-disrupting threshold:
Cycling ScienceDark Chocolate Flavanols and Cycling Performance: The Evidence
5 min readCycling FTP Calculator
Athletic PerformanceDehydration and Strength: 2% Body Weight Loss Costs Up to 8%
5 min readElectrolyte Loss Calculator
Athletic PerformanceDeload Week: The Supercompensation Science of Training Less
5 min readRecovery Need Estimator
Athletic PerformanceMuscle Memory and Myonuclei: The Cellular Mechanism of Retraining
5 min readGenetic Potential Calculator — Max Natural Muscle Mass
Sports NutritionDHA in Pregnancy: Why 200mg Is the Floor for Foetal Brain Development
5 min readPregnancy Nutrient Calculator
Athletic PerformanceThe Dietary Inflammatory Index: Is Your Diet Fuelling Recovery or Systemic Inflammation?
5 min readZone Diet Blocks Calculator
Athletic PerformanceDietary Nitrate and Beetroot Juice: The Nitric Oxide Performance Evidence
5 min readVO₂ Max Calculator
Athletic PerformanceYou Might Be Eating Enough Protein — But Not Absorbing Enough. Digestive Enzymes Explain the Gap.
5 min readProtein Intake Calculator
Sports NutritionDOMS: Mechanisms, Evidence and What Actually Reduces Soreness
5 min readRecovery Need Estimator
Athletic PerformanceGlucose-Fructose Gels: Breaking the 60g Carb Absorption Ceiling
5 min readFor athletes calculating whether their event duration requires 60g/hr (single-transporter) or 60–90g/hr (dual-transporter) fuelling — and identifying the right gel formulation before race day:
Strength & MuscleDaily Undulating Periodisation (DUP): Why Fixed Rep Ranges Underperform
5 min readOne Rep Max (1RM) Calculator
Athletic PerformanceEarly Specialisation in Youth Sport: The Dropout Evidence
5 min readPediatric Growth & Dosage Calculator
Athletic PerformanceNordic Hamstring Curl: The Eccentric Exercise That Cuts Injury Risk 51%
5 min readOne Rep Max (1RM) Calculator
Athletic PerformanceElectrolytes for Endurance: Why Drinking More Water Makes It Worse
5 min readIf you want to calculate your estimated sweat rate, sodium loss per hour, and fluid replacement targets for your specific conditions:
Cycling ScienceProtein for Endurance Athletes: AMPK, mTOR and the Speed Cost
5 min readProtein Intake Calculator
Athletic PerformanceEnergy Gels vs Real Food in Ultra-Endurance Events: The Physiology Is Identical. The Practical Differences Are Not.
5 min readFor athletes calculating gel requirements for the gel-dominant phase of long events before transitioning to real food:
Athletic PerformanceTaking an Energy Gel Without Water Isn't Just Uncomfortable — It Physiologically Delays the Carbohydrate Reaching Your Muscles. Here Is Exactly Why.
5 min readFor athletes planning gel intake alongside fluid requirements — ensuring each gel is paired with adequate water to prevent the osmolality-driven GI distress that ends races:
Sports ScienceTextbooks Teach ATP-PCr, Glycolysis, and Oxidative Metabolism as Three Separate Systems. They Are Not. Understanding Why Changes How You Should Design Training Across All Sports.
5 min readVO₂ Max Calculator
Athletic PerformanceExertional Rhabdomyolysis: The Training Day That Destroys Kidneys
5 min readOutdoor Safety Risk Calculator
Athletic PerformanceExogenous Ketones: What the Evidence Actually Shows for Athletic Performance
5 min readKeto Macro Calculator
Sports NutritionFasted Cardio Burns More Fat During the Session. It Does Not Burn More Fat Overall.
5 min readAdaptive TDEE Calculator — Back-Calculate Your True Maintenance Calories
Health ScienceYour Natural Muscle Ceiling Is Not Where You Think It Is — The Science of Genetic Potential
5 min readGenetic Potential Calculator — Max Natural Muscle Mass
Athletic PerformanceFirst Energy Gel Timing: When to Take It in an Endurance Race
5 min readFor athletes building a race-day fuelling schedule with evidence-based first-gel timing and automatically spaced subsequent intervals:
Wealth OptimizationShould a Fitness Business Buy or Lease Its Space? The Financial Calculation Most Coaches Skip.
5 min readIf you want to model the monthly repayment on a commercial property purchase — and compare it directly against current lease costs to calculate the ownership break-even point:
Strength & MuscleFlywheel (Isoinertial) Training: Eccentric Overload Beyond 1RM
5 min read1RM Calculator
Athletic PerformanceFoam 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.
5 min readRecovery Need Estimator
Cycling ScienceCycling Gear Ratios: The Physics of Riding in the Right Gear
4 min readIf you want to calculate your exact gear ratios, optimal cadence zones, and projected speed for any chainring/cassette combination:
Athletic PerformanceGenetic Potential and Trainability: What the HERITAGE Study Found
5 min readGenetic Potential Calculator
Athletic PerformanceGlutamine and Immunity: The Amino Acid Endurance Athletes Deplete
5 min readProtein Intake Calculator
Athletic PerformanceAthletes Have Been Using Glycaemic Index Wrong for 40 Years
5 min readMacro Meal Generator
Athletic PerformanceGlycerol Hyperhydration: The Pre-Race Fluid Loading Protocol
5 min readElectrolyte Loss Calculator
Athletic PerformanceGlycogen Depletion and the Bonk: The Carbohydrate Maths That Prevents It
5 min readFor athletes calculating the carbohydrate intake and gel count required to prevent glycogen depletion — building the pre-emptive fuelling plan before the bonk becomes a late-race problem:
Health ScienceGrip Strength as a Longevity Biomarker: The 140,000-Person Evidence
5 min readChronic Disease Nutrition Guide
Athletic PerformanceElite Endurance Athletes Have a Measurably Different Gut. Here's What's in It — and Why It Matters.
5 min readFor athletes and coaches building structured meal plans across different dietary patterns — and wanting to diversify fibre sources across training and rest days:
Athletic PerformanceThe 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.
5 min readFor athletes building the gel protocol they need to practise in training before executing on race day:
Athletic PerformanceHaemochromatosis in Athletes: When Iron Supplementation Turns Dangerous
5 min readIron Needs Calculator
Athletic PerformanceHeat Acclimatisation: Plasma Volume Expansion and Cool-Weather Carryover
5 min readFor athletes and coaches calculating sweat-rate-adjusted electrolyte replacement during heat training blocks — particularly as acclimatisation increases hourly fluid and mineral loss:
Athletic PerformanceHeat Stress and Gut Permeability: What Happens Above 39°C
5 min readFor athletes planning hydration strategy for hot-weather racing — calculating sweat rate and sodium losses to protect both performance and intestinal barrier function:
Athletic PerformanceHeat-Adjusted Race Prediction: What Summer Does to Your Marathon Pace
5 min readMarathon Race Predictor
Sports NutritionHMB Supplementation: The Specific Use Case for Muscle Protection
5 min readProtein Intake Calculator
Athletic PerformanceMost 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.
5 min readFor athletes quantifying training load and recovery need — giving objective context to what their suppressed or elevated HRV readings are actually reflecting:
Strength & MuscleHypertrophy Mechanisms: Mechanical Tension vs Metabolic Stress vs Damage
5 min readFor coaches and athletes calculating 1RM to set accurate load targets across all rep ranges — ensuring both tension-dominant and metabolic-stress-dominant protocols use the correct percentage of true maximum:
Cycling ScienceHypoxic Tents and Normobaric Altitude: What the Evidence Says
5 min readVO2max Calculator
Cycling ScienceInspiratory Muscle Training: The Respiratory Limiter Intervals Miss
5 min readVO2max Calculator
Athletic PerformanceThe Intermittent Fasting Mistake That's Silently Undermining Your Training Adaptations
4 min readIf you want to calculate your optimal eating window timing relative to your training schedule — including recommended meal timing and protein distribution:
Strength & MuscleValsalva and Intra-Abdominal Pressure: Bracing for Spinal Stability
5 min readOne Rep Max (1RM) Calculator
Athletic PerformanceIntra-Workout Carbohydrate Dose: The 75-Minute Threshold
5 min readEnergy Gel Calculator
Strength & MuscleIPF GL Points: The Formula That Replaced the Wilks Score
5 min readWilks Score Calculator
Athletic PerformanceIron Absorption: Haem vs Non-Haem and the Role of Hepcidin
5 min readFor athletes and coaches calculating personalised iron requirements — accounting for training type, sweat loss, and menstrual status — and determining whether supplementation is indicated and at what dose:
Athletic PerformanceIron Deficiency in Runners: Check This Before Blaming Overtraining
5 min readIf you want to estimate your daily iron requirement based on training load, mileage, diet type, and gender — and see whether your current intake is likely to be sufficient:
Athletic PerformanceYour Athlete Isn't Burnt Out. Their Thyroid Is Starved of Iron. Here's the Overlooked Mechanism.
5 min readIron Needs Calculator
Sports NutritionCalories vs Macros: What Isocaloric Metabolic Ward Studies Settle
5 min readMeal Plan Generator Based on Macros — Free
Cycling ScienceKarvonen Formula: Why Heart Rate Reserve Beats %Max for Zone 2
5 min readHeart Rate Zone Calculator
Athletic PerformanceFat Adaptation Is Real — But the Research on Keto and Endurance Performance Is Not What You've Been Told
5 min readIf you want to calculate your keto macro targets adjusted for training load, event duration, and fat adaptation phase — including a timeline for metabolic transition:
Athletic PerformanceL-Carnitine and Fat Transport: What the Trials Actually Deliver
5 min readKeto Macro Calculator
Cycling ScienceL-Citrulline Malate for Cycling: The Nitric Oxide Evidence
5 min readCycling FTP Calculator
Athletic PerformanceLT1, LT2, and MLSS: Why Coaches and Athletes Keep Confusing the Three Thresholds That Define Training Zones
5 min readIf you want to estimate your FTP and build training zones anchored to LT1/LT2 thresholds rather than arbitrary percentages:
Athletic PerformanceLightning Risk for Outdoor Athletes: The Evidence-Based Protocol That Could Save Your Life
5 min readOutdoor Safety Risk Calculator
Athletic PerformanceMacro Timing and Distribution: How Daily Spread Changes the Outcome
5 min readIf you want to generate a personalised meal plan that distributes your daily macro targets across the right number of meals with training-day and rest-day adjustments:
Athletic PerformanceAthletes Are Taking Magnesium for Sleep — But Most Are Using the Wrong Form at the Wrong Time
5 min readIf you want to calculate your personalised magnesium requirement based on training load, sweat rate, diet type, and sleep quality goals:
Athletic PerformanceNot All Magnesium Is Equal: Why Threonate Crosses the Blood-Brain Barrier When Glycinate Doesn't
5 min readMagnesium Intake Estimator
Athletic PerformanceMagnesium, TRPM6 and Glucose Uptake: The Overlooked Connection
5 min readMagnesium Intake Estimator
Athletic PerformanceYour 5K Time Doesn't Predict Your Marathon — And Aerobic Decoupling Explains Why
5 min readMarathon Race Predictor
Athletic PerformanceMost Marathon Runners Carry Either Too Many Gels or Too Few. The Calculation That Fixes This Takes About 90 Seconds.
5 min readFor runners calculating exact gel count, carb target, and timing schedule for marathon race day:
Athletic PerformanceMarine vs Bovine Collagen: Which Source Actually Works for Athletes?
5 min readCollagen Dosage for Joints Calculator
Athletic PerformanceMassage and Recovery: The Mechanotransduction and PGC-1α Evidence
5 min readRecovery Need Estimator
Athletic PerformanceMarathon Age Grading: How WMA Compares a 3:15 at 55 to 2:45 at 28
5 min readMarathon Race Predictor
Athletic PerformanceBarry Sears Said 40-30-30. The Mediterranean Diet Says Something Different — And the Data Takes Sides
5 min readZone Diet Blocks Calculator
Athletic PerformanceMelatonin Dose: Why 0.5mg Outperforms 5mg for Athletes
5 min readMelatonin Timing Calculator
Athletic PerformanceMelatonin for Jet Lag: The Timing Protocol That Actually Works
4 min readIf you want to calculate the optimal melatonin timing and dosing for your specific travel route, time zone difference, and competition schedule:
Athletic PerformanceMenstrual Cycle Training: Follicular vs Luteal Phase Programming
5 min readRecovery Need Estimator
Athletic PerformanceMental Fatigue and Performance: The Psychobiological Model Explained
5 min readRecovery Need Estimator
Athletic PerformanceTwo 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.
5 min readFor athletes calculating their protein intake targets — understanding both the dose required and how meal distribution affects net amino acid availability:
Athletic PerformanceBarefoot Running Science: What Harvard Got Right — And What the Minimalist Movement Got Wrong
5 min readRunning Pace Calculator
Strength & MuscleYou're Leaving Hypertrophy on the Table After Every Set. The Myo-Reps Method Fixes That.
5 min readOne Rep Max (1RM) Calculator
Athletic PerformanceNasal Breathing and CO₂ Tolerance: The Performance Evidence
5 min readVO₂ Max Calculator
Athletic PerformanceNatural Muscle Gain Rate: How Much You Can Build Per Year
5 min readGenetic Potential Calculator
Athletic PerformanceGluten-Free Athletes and NCGS: Why 41% Probably Should Not Be
5 min readPaleo Diet Macros
Sports NutritionNEAT and Step Count: Why 14 Sedentary Hours Beat Your Workout
5 min readAdaptive TDEE Calculator — Back-Calculate Your True Maintenance Calories
Cycling ScienceNegative Split Pacing: The Physics of Time Trial Strategy
5 min readFTP Calculator
Athletic PerformanceNMN and NR for NAD+: Does It Improve Athletic Performance?
5 min readRecovery Need Estimator
Athletic PerformancePowerlifters Periodise Their Training Across the Year. Most Forget to Periodise Their Nutrition. Here's What an Optimised Strength Nutrition Calendar Looks Like.
5 min readMacro Meal Generator
Athletic PerformanceOmega-3 (EPA/DHA) for Muscle Recovery: Dose and Evidence
5 min readIf you're calculating protein intake targets for athletes in strength or hypertrophy phases:
Athletic PerformanceOpen Water Swimmers Are Not Drowning From Hypothermia — They're Dying From Cold Shock. Here's the Difference.
5 min readOutdoor Safety Risk Calculator
Athletic PerformanceHeat Risk for Outdoor Athletes: When Performance Loss Turns Dangerous
5 min readIf you want to assess your outdoor training or race-day heat risk based on current conditions — integrating temperature, humidity, wind speed, and solar load into a single WBGT-based risk category:
Athletic PerformanceOvertraining Syndrome vs Functional Overreaching: How to Tell Them Apart
5 min readRecovery Need Estimator
Athletic PerformancePaleo Diet and Athletic Performance: What Paleolithic Athletes Really Ate
5 min readIf you want to calculate your personalised paleo macro targets adjusted for training volume, body weight, and athletic goal — with food substitutions that maintain paleo principles while meeting athletic carbohydrate needs:
Strength & MusclePost-Activation Potentiation (PAP/PAPE): The Heavy Squat Before Sprinting
5 min readFor athletes calculating the 1RM strength baseline needed to generate meaningful PAPE — heavy enough that the conditioning set causes potentiation, not just fatigue:
Sports NutritionPerimenopause and Resistance Training: Why Cardio and Calorie Cuts Backfire
5 min readMenopause Nutrition Calculator — Perimenopause, Menopause & Post-Menopause
Athletic PerformanceBlock Periodisation After 40: Modifying the Model for Masters Athletes
5 min readFor masters athletes and coaches calculating recovery timelines and appropriate session spacing — modelling how intensity, volume, and age interact to determine when the next heavy training stimulus is appropriate:
Sports NutritionPhosphatidic Acid and mTOR: Hypertrophy Signalling Without Stretch
5 min readProtein Intake Calculator
Athletic PerformancePhosphatidylserine and Cortisol: Blunting the Post-Training Stress Response
5 min readRecovery Need Estimator
Athletic PerformancePlant Protein DIAAS: The Score That Replaced PDCAAS for Vegan Athletes
5 min readIf you want to calculate protein intake targets adjusted for training load, body composition goals, and dietary pattern — including upward adjustments for plant-based athletes based on DIAAS considerations:
Athletic PerformancePolarised vs Pyramidal Training: How Elites Distribute Intensity
5 min readHeart Rate Zone Calculator
Athletic PerformancePost-Exercise Hypotension: The 22-Hour Blood Pressure Drop
5 min readChronic Disease Nutrition Guide
Athletic PerformancePostpartum Return to Training: The Nutrition Science Most Athletes Ignore
5 min readPregnancy Nutrient Calculator
Athletic PerformancePotassium in Ultra-Endurance: The Electrolyte Nobody Discusses
5 min readElectrolyte Loss Calculator
Athletic PerformancePower Nap for Performance: The 26-Minute NASA Recovery Window
5 min readSleep Cycle & Recovery Calculator
Cycling SciencePower-to-Weight Ratio (W/kg): Why It Beats Raw Watts on Climbs
5 min readFor cyclists calculating VAM from climb data to track whether W/kg improvements are translating to real-world climbing performance gains:
Strength & MuscleThe 9-Attempt Problem: Why Powerlifting Competition Strategy Is More Than Just Being Strong
5 min readOne Rep Max Calculator
Sports NutritionPre-Competition Nutrition: The 48-Hour Protocol That Protects Your Race
5 min readMacro Meal Generator
Athletic PerformancePre-Cooling Strategies for Hot-Weather Racing: The Protocol
5 min readOutdoor Safety Risk Calculator
Athletic PerformancePre-Sleep Nutrition: Glycine, Theanine and Overnight Recovery
5 min readSleep Performance Calculator for Athletes
Sports NutritionPregnancy Nutrition for Active Women: What Prenatal Advice Misses
5 min readIf you want to calculate personalised nutrient targets for pregnancy based on pre-pregnancy weight, trimester, activity level, and dietary restrictions — including choline, DHA, and iodine:
Athletic PerformanceProbiotics and Post-Exercise Immunity: The Open Window Evidence
5 min readRecovery Need Estimator
Athletic PerformanceProtein and Bone Health: Debunking the Acid-Load Calcium Myth
5 min readProtein Intake Calculator
Athletic PerformanceProtein in a Caloric Deficit: Protecting Lean Body Mass
5 min readIf you want to calculate protein targets adjusted for caloric deficit phase — including per-meal leucine-sufficient distribution and body composition-based targets:
Sports NutritionThe 30-Minute Anabolic Window After Training Has Generated More Supplement Sales Than Scientific Evidence. The Meta-Analysis That Should Have Ended the Myth — and Why Total Daily Protein Still Matters More.
5 min readFor athletes calculating accurate daily protein targets based on training load, lean mass, and goal — with meal distribution recommendations that prioritise total intake and leucine thresholds over peri-workout timing:
Athletic PerformanceQuercetin and Polyphenols: Exercise Adaptation and the Blunting Catch
5 min readRecovery Need Estimator
Athletic PerformanceThe 45-Year-Old Formula That Predicts Your Race Time More Accurately Than Your Training Pace
4 min readIf you want to run the Riegel formula across multiple distances from a single reference race — and generate your optimal pace-per-km targets for each distance:
Cycling ScienceRamadan and Elite Sport: How Muslim Athletes Train Through the World's Most Demanding Fast
5 min readIntermittent Fasting Window Calculator
Athletic PerformanceYour 1RM Tells You How Strong You Are. Rate of Force Development Tells You How Explosive You Actually Are.
5 min readFor coaches and athletes establishing 1RM baselines as the foundation for explosive power programming:
Athletic PerformanceYou're Probably Underrecovering — And Training More Isn't Going to Fix It
4 min readIf you want to estimate how many hours of recovery your training sessions actually require based on intensity, duration, and sleep quality:
Athletic PerformanceThe Relative Age Effect: Why Your Birthday Determines Who Gets Scouted
5 min readPediatric Growth & Dosage Calculator
Athletic PerformanceThe Athlete Who Eats Less to Perform Better Is Often the One Whose Performance Deteriorates Fastest.
5 min readFor athletes and coaches calculating protein requirements during caloric restriction phases — where LEA reduces protein utilisation efficiency and higher absolute intakes are needed to maintain muscle mass:
Cycling ScienceCyclists Who Train at the Wrong Intensity Are Burning the Wrong Fuel. The Number That Exposes the Problem Is a Simple Ratio Between the CO₂ You Exhale and the O₂ You Inhale — and Most Athletes Have Never Measured It.
5 min readFor cyclists anchoring Zone 2 and Fat Max intensity from a verified FTP benchmark — rather than guessing at the substrate-optimal training zone:
Athletic PerformanceThe 60-Second Rest Period Is the Most Reflexively Applied Recommendation in Resistance Training. The PCr Resynthesis Data Suggests It's Wrong for Most Goals.
5 min readFor athletes calculating creatine loading protocols to accelerate PCr resynthesis and support inter-set recovery — including loading vs gradual saturation timelines and bodyweight-adjusted daily dosing:
Athletic PerformanceThe Adaptogen That Blunts Cortisol Without Dulling Performance: Rhodiola Rosea Explained
5 min readRecovery Need Estimator
Athletic PerformanceHeart Rate Lies in the Heat, After Illness, and in Overreaching. RPE Has Known This for 50 Years.
5 min readIf you want to establish calibrated heart rate training zones — the baseline against which session RPE comparisons and cardiac drift detection are most useful:
Sports NutritionCreatine Supplementation: The Complete Evidence Review
16 min readCreatine Loading Calculator
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