Articles · 184 published · 938 citations
Long-form reference for lifters and runners.
Pillar guides go deep on the literature — Schoenfeld, Seiler, Morton, Kouri, Riegel. Standard guides answer a single question, with every specific number traceable to a source. No plans, no protocols, no “transform” language. Just what the evidence supports, with dated caveats.
Long-form canonical references
Pillars 44
Endurance Training: The Evidence-Based Levers
Endurance training, ranked by evidence: intensity distribution, easy-day pace, VO2 max, and the taper, each linked to its deep dive on the science.
Read article →
Body Composition: The Four Lenses
Body composition through four lenses: BMI, FFMI, measured body fat, and energy balance. What each metric answers, where it fails, and the deep dives.
Read article →
How to Build Muscle: The Evidence-Based Levers
Build muscle by ranking the five levers the research supports: volume, proximity to failure, load, frequency, and protein, each linked to its deep dive.
Read article →
Training to Failure vs Reps in Reserve: What Works
Training to failure vs reps in reserve, reviewed: Robinson 2024 recasts the binary debate as a continuous proximity curve where size and strength diverge.
Read article →
VO2 Max and Longevity: The 122,000-Patient Mortality Study
VO2 max sits at the center of the 2026 longevity debate: what the 122,007-patient Mandsager 2018 mortality study found, and why fitness has no ceiling.
Read article →
GLP-1 Muscle Loss: Keep Lean Mass with Lifting and Protein
GLP-1 weight loss costs lean mass: 25-39% of the total. How lifting 2-3x weekly and 1.2-1.6 g/kg protein hold muscle, and where the magnitude is debated.
Read article →
Light vs Heavy Weights for Muscle Growth: The Evidence
Light vs heavy load for muscle growth: the Schoenfeld 2017 meta, Morton 2016, and Lasevicius 2018 show similar hypertrophy to failure, load wins 1RM.
Read article →
Body Recomposition for Lifters: The Calorie Math
Body recomposition is real for specific populations under specific conditions. The four conditions, protein math scaled to LBM, 12-week example.
Read article →
Evidence-Based Hypertrophy & Powerlifting Programming 2026
Evidence-based hypertrophy and powerlifting programming for 2026: 10-20 hard sets per muscle weekly, train each twice, load 30-85% near failure, periodize.
Read article →
Zone 2 Training: What the Literature Says
Zone 2 training is work below LT1 (~65-75% HRmax), the easy base of Seiler 80/20. What the literature shows on dose-response, how to find it, and the limits.
Read article →
DOTS vs Wilks vs GL Points: Which Score to Use
DOTS vs Wilks vs IPF-GL powerlifting scores compared: same bodyweight polynomial, but DOTS (2019) and GL (2020) replaced 1994 Wilks. Which to quote.
Read article →
Morton 2018 Protein: 1.6 g/kg, 2.2 Upper 95% CI
Morton 2018 placed the protein plateau at 1.6 g/kg with a 95% CI upper bound near 2.2 g/kg (49 studies, n=1,863). Cutting raises it to 2.3-3.1 g/kg lean.
Read article →
VO2 Max Field Tests: Which Derivation to Trust
VO2 max field tests compared: Cooper, Rockport, Bruce, Astrand, and the 12-min run — accuracy, population validity, and which derivation to trust.
Read article →
Riegel Formula Exponent 1.06 (Original 1981 Paper)
Riegel formula exponent 1.06 from the original 1981 American Scientist paper: T2 = T1 x (D2/D1)^1.06. Accurate for 5k-21k; raise to 1.10-1.15 for marathons.
Read article →
TDEE Formulas Compared: Mifflin vs Harris vs Katch
TDEE formulas compared: Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, WHO/FAO. Population, error bands, and when each estimator is appropriate.
Read article →
FFMI 25 Natural Limit: The Kouri 1995 Study, Reappraised
FFMI 25 as the natural muscular limit: what Kouri's 1995 sample of 157 lifters actually measured, and what the 2020 drug-tested reappraisal changed.
Read article →
Bod Pod vs DEXA vs Calipers: Body Fat Accuracy
Bod Pod runs about +/-2-3% body-fat error, DEXA +/-1-2%, calipers +/-3-4%. Compare accuracy, cost, and cadence to pick a body composition method for athletes.
Read article →
Maximum Natural FFMI: The Confounders That Bend the Limit
Maximum natural FFMI is a soft limit, not a wall: Kouri 1995 put naturals near 25, but glycogen, height over 195 cm, and contest-day bias bend the number.
Read article →
Zone 2 Training Methods and Limits: Lactate, HR, Talk Test
Zone 2 training methods and limits: lactate meter, Karvonen 60-70% HRR, and the talk test, and where each method's error band blurs the LT1 boundary.
Read article →
RPE Programming: Why the Math Beats the Coach
When RPE prescription dominates fixed %1RM, when it doesn't, and how to calibrate the scale so the math actually works for an intermediate lifter.
Read article →
Heart-Rate Zones: Methods Compared
Heart-rate zone methods compared: Karvonen, %HRmax, %HRR, lactate threshold — accuracy by training age, error bands, and which one for which goal.
Read article →
Race-Time Prediction: VDOT vs Riegel Failure Modes
Race-time prediction failure modes: where VDOT, Riegel, and Cameron break — distance regimes, training-status assumptions, and prediction-error bands.
Read article →
Block vs DUP Periodization: The Hypertrophy Math
Block periodization concentrates a stimulus. DUP rotates it. The math behind which produces more hypertrophy at a given fatigue cost.
Read article →
Sleep Debt vs Training Stress: The Interaction
Sleep debt and training stress compound nonlinearly. The TRIMP-adjusted recovery model and what 5 hours of sleep does to next-day output.
Read article →
Heat Acclimatization: Sodium and Plasma Volume
Heat acclimatization shifts plasma volume up 10-12% in 10-14 days. The sodium math that supports the adaptation and the workouts that drive it.
Read article →
Pre-Fatigue Training: When the Math Says It Helps
Pre-fatigue protocols (light isolation before compound) work for some populations. The literature on when they help vs when they reduce total volume.
Read article →
Carb Periodization for Hybrid Athletes
Hybrid athletes need different carbs on lift days vs run days. The g/kg math, fueling-window logic, and mode-by-mode periodization.
Read article →
Powerlifting Peaking Math
Powerlifting peaking compared: Smolov, Sheiko, and Texas Method — volume curves, recovery demands, and the meet-prep windows each handles best.
Read article →
Aggressive Bulk vs Lean Bulk: The Math (Garthe RCT)
Aggressive bulk vs lean bulk, run through the Garthe RCT: a 600-cal surplus added 1.7 kg lean and 1.1 kg fat in 12 weeks vs 1.2 kg lean, zero fat.
Read article →
4 Week Mini Cut: The Math That Resets Body Fat Between Bulks
4 week mini cut math: a 20-25% deficit drops ~1.0-1.5% bodyweight weekly, resetting 3-4 points of body fat between bulks. Macros, training, refeed.
Read article →
Recovery Math: How HRV, Sleep, and RPE Predict
Recovery math: HRV, sleep, and session-RPE as predictors of next-day readiness. What the literature actually shows and what the consumer apps over-claim.
Read article →
Marathon Taper: Reduce Volume 41-60%, Keep Intensity
Marathon taper: cut volume 41-60% over two weeks, keep intensity, trim frequency 10-20% (Bosquet/Mujika 2007). The pooled performance gain was +1.96%.
Read article →
Velocity-Based Training: 1RM From Bar Speed
A load-velocity profile estimates your 1RM from sub-maximal bar speed, no max attempt needed. How the math works, the research, and a worked example.
Read article →
Concurrent Training Interference Effect on Hypertrophy
Concurrent training interference on hypertrophy was -0.35 in Wilson 2012 but shrank to -0.11 in the Schumann 2022 meta-analysis; lower-body 1RM showed none.
Read article →
Detraining: Endurance Declines Faster Than Strength
Detraining endurance declines faster than strength: VO2 max drops ~7% per week early (Coyle 1984); 1RM holds 2-3 weeks, then 7-10% per week (Andersen 2005).
Read article →
Why You Stalled at a 1.5x Bodyweight Squat
Why your squat stalled at 1.5x bodyweight — and the four programming, recovery, and technique levers most lifters should pull before adding volume.
Read article →
Female Athlete Physiology: Where Formulas Fail
Female-athlete physiology: where standard fitness formulas (TDEE, body-comp, 1RM) under- or over-predict, and the corrections backed by current literature.
Read article →
Polarized vs Threshold Training: 2026 Evidence Review
Polarized vs threshold training compared: the Seiler 80/20 model, Stoggl 2014 and Filipas 2021 on what wins for VO2 max and when threshold work pays off.
Read article →
Hybrid Athlete Macro Splits
Hybrid athlete macros: the split between strength and endurance days, periodised carbs around hard sessions, and protein scaling for two-stress training.
Read article →
Junk Volume in Hypertrophy
Junk volume in hypertrophy: how to read your training log for the sets that aren't producing growth, scoped to the 10-20 sets/week meta-window.
Read article →
Marathon Pace and Elevation Adjustments
Marathon pace and elevation: a validated correction for total climb / descent — Strava grade-adjusted pace, Naismith's rule, where they break.
Read article →
Travel and Jet Lag for Athletes: The Recovery Math
Travel and jet lag for athletes: the time-zone math, melatonin and light exposure timing, and how performance decay tracks with hours misaligned.
Read article →
The 2026 Wearable & AI-Coaching Accuracy vs Value Index
The 2026 wearable accuracy vs value index: which Garmin, Oura, WHOOP, Apple Watch and Eight Sleep metrics are validated, and at what price. Sourced.
Read article →
TDEE Maintenance Calorie Reference: Age and Activity Level 2026
TDEE maintenance calories by Mifflin-St Jeor: age 20–60, five activity levels. Male 80 kg/178 cm and female 65 kg/165 cm reference grids, engine-computed at build time.
Read article →
Focused how-to articles
Standards 51
How to Build Muscle as a Beginner
Building muscle as a beginner: the first-12-month volume / intensity / nutrition prescription — what the meta-analyses agree on for new lifters.
Read article →
How to Break a Weight-Loss Plateau
Breaking a weight-loss plateau: adaptive thermogenesis math, refeed protocols, training-volume changes, and the four leverage points before changing tools.
Read article →
TDEE for Athletes: Why Formulas Understate You
TDEE for athletes: why standard equations under-predict for hybrid and endurance training. Activity-factor adjustments and exercise-energy add-ons.
Read article →
How to Train for a 5k
A ten-week plan built around polarised training, aerobic base work, and a weekly VO2 max session — with pacing pulled from Riegel.
Read article →
How to Plan a Deload Week
Deload week planning: when to take one (set/rep stagnation, RPE drift, sleep markers), how to scale volume vs intensity, and what to monitor on return.
Read article →
How to Structure a Powerlifting Meet Day
Powerlifting meet structure: opener / second / third attempt selection math, warm-up timing, equipment rules, and the day-of decisions that win meets.
Read article →
How to Eat Enough Protein
Eating enough protein: the daily target by training goal, leucine threshold per meal, distribution across the day, and plant-based bioavailability adjustments.
Read article →
How to Count Macros
Counting macros: protein, carbs, and fat targets by training goal, meal-by-meal practical splits, and the tracking-app pitfalls that bias intake low.
Read article →
How to Estimate a 1RM Without Testing for One
Estimate a 1RM without testing: Epley, Brzycki, Lombardi, O'Conner, Wathan, and Mayhew — error bands, rep-range fit, and safety.
Read article →
How to Use RPE for Training
The 1–10 RPE scale, reps-in-reserve framing, and how to anchor percentages to a moving 1RM instead of a stale one.
Read article →
How to Use Heart Rate Zones
Heart-rate zones: which method (Karvonen, %HRmax, lactate threshold) for which goal, and how to set zone boundaries when you don't have a lab test.
Read article →
How to Improve VO2 Max
VO2 max improvement: the four interventions with the largest meta-analytic effect — interval volume, threshold work, training age, and altitude exposure.
Read article →
How to Improve Sleep for Recovery
Improve sleep for recovery: stage architecture, evening blue-light load, caffeine half-life, sleep-restriction, and what actually moves HRV the next day.
Read article →
How to Measure Body Fat at Home
Measure body fat at home: skinfold calipers, bioelectrical impedance, Navy method, and DEXA reality-check — accuracy, error bands, and method choice.
Read article →
How to Run a Mini Cut
Run a mini-cut: the 4-6 week deficit window, weekly weight-loss target, training-volume scaling, and re-feed criteria to avoid muscle loss.
Read article →
Mobility Assessment: How to Test and Improve It
What mobility tests like sit-and-reach and the Functional Movement Screen actually measure, plus the stretching dose-response and a 6-week ROM protocol.
Read article →
20-Week Recomp: 84kg/24% to Target 18% Body Fat
Body recomp plan for an 84 kg male at 24% body fat, 20-week target 18%: 338 kcal/day deficit, 0.31 kg/week pace, 6.15 kg fat to lose, 140 g protein.
Read article →
Calorie Deficit: 85 kg to 75 kg in 20 Weeks at 2200 TDEE
Calorie deficit 550 kcal/day: eat 1650 kcal for an 85 kg adult at 2200 TDEE. Loss pace 0.5 kg/week, 25% deficit, 77000 kcal total cut over 20 weeks.
Read article →
Concurrent Training Interference: 4 Lifts, 35km Running, 1 Rest Day
Concurrent training interference from 4 lifts + 35 km running: strength -16.3%, hypertrophy -21.5%, power -31.5%, plus the split rule that fixes it.
Read article →
Creatine Loading vs Maintenance for an 82kg Lifter
Creatine loading 24.6 g/day for 7 days then 3 g/day maintenance for an 82 kg lifter. 262 g per month, hydration baseline 2.87 L, math and trade-off.
Read article →
Cycling FTP Zones: 250W at 75kg, 3.33 W/kg Walkthrough
Cycling power zones for a 250W FTP / 75kg rider: 3.33 W/kg trained category, Z2 endurance 140-188W, Z4 threshold 228-263W, Z5 VO2max 265-300W.
Read article →
Detraining Decay: 4 Weeks Off for a 3-Year Trained Lifter
Detraining math: 150 kg 1RM after 4 weeks off for a 3-year trained lifter loses 2.9% to 145.7 kg. Retraining 2 weeks to peak, the decay curve, and gaps.
Read article →
DOTS, Wilks, GL: An 83kg/510kg Male Lifter Scored Three Ways
DOTS 344.3, Wilks 340.7, IPF GL 70.6 for an 83 kg raw male lifter with a 510 kg total. The classification splits, why DOTS replaced Wilks, and what shifts.
Read article →
Female Athlete Formula Suite: A 30-Year-Old in Regular Cycle
Female athlete formulas for 65 kg, 168 cm, 24% body fat, regular cycle. The luteal-versus-follicular caloric drift and where male equations fail.
Read article →
FFMI for the Intermediate Female Lifter: A 60kg/165cm/22% Walkthrough
FFMI for a 60kg, 165cm, 22% body-fat female intermediate lifter: adjusted 18.10 walkthrough, percentile context, and why the Kouri 25 cap was male-only.
Read article →
HRV Deload Trigger: A 7-Day Decline from Baseline 56 to Mean 50
HRV trend 55, 57, 52, 48, 46, 47, 45 against baseline 56 (SD 4.2). Rolling deviation -10.7%, five days below SWC, deload recommendation: yes. The math.
Read article →
Hybrid Training Plan: 30km Running, 70/20/10 Intensity, Three Lifts
Hybrid training math for 30 km/week running (70% easy, 20% tempo, 10% interval) plus three lifts. Session map, recovery debt, realistic goal window.
Read article →
16:8 Intermittent Fasting Starting at Noon: A Realistic Schedule
Intermittent 16:8 with a noon first meal: the eating window, training-window timing, and where protein distribution math creates a real problem.
Read article →
Junk Volume Detector: A 3-Week Stalling Squat Log
Junk volume read of a 3-week squat log progressing from 100 to 103 kg: 0% junk sets, all 9 sets effective. Volume load delta drops from 2.5% to 0.5%.
Read article →
Macro Cycling for an 80kg Male Recomp at 2500 kcal TDEE
Macro cycling for an 80 kg male recomp: 2600 kcal training days, 2200 kcal rest. Protein 131 g flat, carbs 239-375 g, fats 64-80 g counter-cycle.
Read article →
Marathon Pace on a Net-Downhill Course: A Boston-Style Walkthrough
Marathon pace math for a Boston-style profile: 145m gain, 290m loss, 200-minute target. The 4:44/km flat-equivalent split and where the model breaks.
Read article →
Meet-Day Attempt Selection for a 300kg-Total Lifter at Moderate Confidence
Meet-day attempt math for 140 squat, 100 bench, 180 deadlift at moderate confidence. The opener spread, third-attempt risk, and day-of revision rule.
Read article →
Muscle Gain Potential: A 178cm Narrow-Frame Male Case
Muscle gain ceiling 80.3 kg for a 178 cm, 17.5 wrist / 22 ankle male. 16.3 kg remaining, 79.7% of potential reached, ~3 years to ceiling. Casey Butt math.
Read article →
From a 40-Minute 10K to a Half Marathon: A Riegel Walkthrough
Forty-minute 10K via Riegel predicts 1:28:15 for the half marathon and 3:04:00 for the marathon. The 1.06 exponent, where it holds, where it lies.
Read article →
Marathon Taper from 90 km Peak: A 2-Week Volume Reduction Plan
Marathon taper from 90 km peak volume: week minus 2 holds 90 km (40.5 km long), week minus 1 drops 60% to 36 km. Intensity 90%, frequency cut 20%.
Read article →
Bench Press RPE 8 for 5 Reps: The Percentage Walkthrough
Bench press RPE 8 for 5 reps maps to 81.1% of 1RM on the RTS table. For a 140 kg bench 1RM that is 113.5 kg. The math and the velocity cross-check.
Read article →
3:15 Marathon Pace: Daniels VDOT Training Zones
3:15 marathon pace from Daniels VDOT 48.7 (4:37/km): Easy 5:25, Marathon 4:45, Threshold 4:26, Interval 4:00, with a 12-week build and race times.
Read article →
Smolov Base Cycle for a 150 kg Squat: 4-Week Walkthrough
Smolov Base mesocycle for a 150 kg squat: weekly volume 136 reps, 4 sessions per week, weights from 105 kg to 135 kg. Week-by-week loading and the cap.
Read article →
Where a 140kg Squat Puts an 80kg Male in the Strength Distribution
Engine output for an 80kg male squatting 140kg single. The percentile rank, the StrengthLevel dataset context, and where age curves take over.
Read article →
Marathon Sweat Rate: 70kg Runner, 2% Body Mass Loss in Warm Conditions
Marathon sweat rate 0.57 L/h, total loss 2.3 L over a 4-hour temperate race. Body mass loss 2.1%, 460 ml/h fluid plan, 529 mg/h sodium target.
Read article →
1500m Freestyle in 30 Minutes: Pace and SWOLF Walkthrough
1500m freestyle in 30:00 means 2:00/100m, 1:49.7/100yd, SWOLF 50, Tempo effort. The pace breakdown, stroke efficiency, and follow-on training plan.
Read article →
TDEE for a Sedentary Office Worker vs a Warehouse Picker
TDEE gap for two 32-year-old 80kg/180cm men: same BMR 1770, different activity multipliers, and the roughly 700 kcal occupational difference.
Read article →
Velocity-Based 1RM: 180 kg Squat at 0.50 m/s in Practice
Velocity-based 1RM math: 180 kg squat at 0.50 m/s estimates 233.2 kg (95% CI 221.5-244.8). The strength-speed zone read and where bar speed lies.
Read article →
Cooper 12-Minute Test: 2400m for a 30-Year-Old Male
Cooper test 2400 m in 12 min for a 30-year-old, 75 kg male: VO2max 42.4 ml/kg/min, classification Good. The formula, calibration, and protocol notes.
Read article →
Wendler 5/3/1 at TM 90%: A Cycle Walkthrough for a 420kg Total Lifter
Wendler 5/3/1 at 90% training max: squat 140, bench 100, deadlift 180, OHP 60. Week 1 to deload weights, AMRAP targets, and progression logic.
Read article →
Zone 2 Heart Rate for a 30-Year-Old, RHR 50: Four Methods Compared
Zone 2 HR for a 30-year-old endurance athlete with resting heart rate 50 bpm: Karvonen 134-148, Maffetone 140-150, percentage 114-133, lactate 125-141.
Read article →
Is MyFitnessPal's TDEE Accurate in 2026?
MyFitnessPal's TDEE in 2026 isn't a true TDEE: it returns a Mifflin-St Jeor goal, accurate within 10% for 70-82% of people. What that means for you.
Read article →
Best Macro Tracking Apps 2026: MacroFactor vs Cronometer vs MyFitnessPal
Best macro tracking apps 2026: MacroFactor vs Cronometer vs MyFitnessPal on price, database accuracy, and adaptive TDEE, with studies cited.
Read article →
Garmin vs COROS vs Polar Running Watch 2026: Marathon Pick
Garmin vs COROS vs Polar running watch 2026 for marathon and half training: verified battery, GPS accuracy, training metrics, and price compared.
Read article →
Smart Scale Body-Fat Accuracy 2026: Withings vs Renpho vs Eufy
Smart scale body-fat accuracy 2026: Withings vs Renpho vs Eufy, and how close BIA really gets to DEXA, with peer-reviewed validation studies cited.
Read article →
Whoop vs Oura vs Garmin 2026: HRV & Recovery Accuracy
Whoop vs Oura vs Garmin 2026: HRV, recovery, and sleep tracking accuracy compared against ECG and polysomnography in independent peer-reviewed studies.
Read article →
Head-to-head buyer picks
Gear & app comparisons 81
Oura Ring 5 vs WHOOP 5.0 vs Galaxy Ring 2026: Compared
Oura Ring 5 vs WHOOP 5.0 vs Galaxy Ring in 2026: verified prices. Oura tracks sleep best, WHOOP coaches recovery, Galaxy Ring skips the subscription.
Read article →
Strava + Runna Bundle vs TrainingPeaks (2026)
Strava + Runna bundle ($149.99/yr) vs TrainingPeaks Premium ($134.99/yr) in 2026: adaptive run coaching plus Claude AI versus structured-plan load tracking.
Read article →
BMI vs FFMI vs Body Fat: A 178cm/80kg Male Through Three Lenses
Run BMI, FFMI, and Navy body-fat on the same 178cm/80kg male. Where the BMI overweight flag clashes with FFMI 22, and what to actually believe.
Read article →
DOTS vs Strength Standards: Two Lenses for the Same Lifter
DOTS vs strength-standards engines for an 80kg/120-squat/80-bench/140-deadlift lifter. Where the two answers disagree and the reason behind the gap.
Read article →
5/3/1 vs Smolov vs Sheiko: Which Plan Fits a Real Intermediate
Run 5/3/1, Smolov base, and Sheiko #29 on a 140kg-squat intermediate. The volume curves, the recovery cost, and the right call by training age.
Read article →
Heart-Rate Zones vs Zone 2 Tools: Two Maps of the Same Effort
Heart-rate five-zone vs dedicated Z2 engines for a 30/55bpm athlete. The percentage-of-MHR versus Karvonen split, the Maffetone line, the real Z2.
Read article →
Ideal Weight vs BMI vs FFMI for a 178cm Male: Three Failure Modes
Ideal weight, BMI, and FFMI engines give three target weights for the same 178cm male. Where Devine breaks, where BMI breaks, where FFMI replaces both.
Read article →
LBM, FFMI, and Body Fat: A Decision Tree for Body Composition
Run LBM, FFMI, and Navy body-fat for an 80kg male. Which output to anchor during a recomp, which during a bulk, and where measurement error wins out.
Read article →
Protein Intake vs Macro Calculators: Three Engines, One Lifter
Run protein-intake, macro, and macro-cycling tools on the same 80kg active lifter. The 1.6 g/kg ISSN floor, the bulk vs cut adjustment, the agreements.
Read article →
Riegel vs VDOT: Half-Marathon Time From a 40-Minute 10K
Project a half-marathon from a 40-flat 10K with Riegel and Daniels VDOT side by side. The 90-second spread, the lactate-threshold assumption, the truth.
Read article →
Running Pace vs Marathon Pace-Elevation: Flat vs Hilly Targets
Run pace tools head-to-head for a 4:00 marathon target. The flat-pace baseline, the Boston-profile delta, and the workout-pace adjustment that holds.
Read article →
Sleep Debt, HRV, and Sleep Calculator: Cross-Checking Recovery Signals
Same week, three engines: sleep debt, HRV trend, sleep-calculator wake time. Where the signals agree, where they conflict, and which one to trust.
Read article →
TDEE vs BMR vs Calories Burned: Which Number Drives Your Plan
Run TDEE, BMR, and an activity-specific calories-burned figure for the same 78kg male. Which output anchors a cut, a bulk, and which is a distraction.
Read article →
VO2 Max Field Tests Compared: Cooper, Rockport, and Step Test
Same 30-year-old male through three field VO2 estimates. The Cooper run, the Rockport walk, and the YMCA step test side by side with the same person.
Read article →
Walking, Treadmill, and Activity Engines: Where 300 kcal Hides
Run the walking, treadmill, and generic calories-burned engines for a 45-minute session at 75kg. The MET assumptions, the incline math, the agreement.
Read article →
Amazfit vs Garmin 2026: Accuracy, Battery and Value Compared
Amazfit vs Garmin in 2026: verified prices, GPS and heart-rate accuracy, battery life and subscriptions, and where cheaper Amazfit closes the gap.
Read article →
Best Running App 2026: Runna vs Nike vs Garmin Coach
Best running app 2026: Runna is $119.99/yr for the adaptive AI coach, Nike Run Club is free, and Garmin Coach is free for Garmin owners. Verified prices.
Read article →
Best Fitness Trackers 2026: Garmin, Whoop, Oura, Apple, Fitbit
Best fitness trackers 2026: Garmin needs no subscription, Whoop and Oura lead recovery, Apple Watch and Fitbit cover mainstream. Verified prices.
Read article →
Best Workout & Training Apps 2026: Hevy, Fitbod, RP, TrainerRoad
Best workout apps 2026: Hevy is the cheapest logger, Fitbod generates workouts, RP runs volume periodization. Verified pricing and the right pick.
Read article →
Best Free TDEE & Calorie Calculators 2026: Honest vs the Apps
Best free TDEE and calorie calculators 2026: free Mifflin-St Jeor tools beat app upsells. How they work and an honest take vs MyFitnessPal.
Read article →
Best Smart Scales 2026: Renpho, Eufy, Withings Compared
Best smart scales 2026: all share the same bioimpedance body-fat method, so price and app decide it. Renpho, Eufy P3, Withings, verified facts.
Read article →
Best Sleep Trackers 2026: Oura, Whoop, Eight Sleep Compared
Best sleep trackers 2026: Oura Ring 4 leads sleep-first rings, Whoop folds it into recovery, Eight Sleep acts on the data. Verified prices and limits.
Read article →
Best Heart Rate Monitors 2026: Chest Straps vs Armbands
Best heart rate monitors 2026: Polar H10 leads chest straps, Garmin HRM-Pro Plus for Garmin owners, Verity Sense for armbands. Verified prices.
Read article →
Best Cycling Computers 2026: Garmin Edge vs Wahoo ELEMNT
Best cycling computers 2026: the mid-tier Garmin Edge 840 or Wahoo ROAM v3 wins for most riders. Verified prices, battery and which tier to buy.
Read article →
Best Free 1RM & Strength Calculators 2026: Honest Guide
Best free 1RM and strength calculators 2026: estimate your max, score a total with DOTS, and rank your strength. How they work and where they break.
Read article →
Chest Strap vs Optical Heart Rate Accuracy 2026: The Gap
Chest strap vs optical heart rate accuracy in 2026: ECG straps track within 1-2 bpm; optical lags by 5-15 bpm at high intensity. Verified studies.
Read article →
Optical Wrist vs Chest Strap HR: What Studies Show 2026
Optical wrist heart rate vs a chest strap: what the validation studies show in 2026. Accuracy holds at steady effort and degrades during intervals.
Read article →
Which Sleep-Stage Metrics Are Validated 2026
Which wearable sleep-stage metrics are validated in 2026: sleep-versus-wake is reliable, deep and REM staging is not. The polysomnography evidence.
Read article →
Recovery & Readiness Scores: What the Evidence Says 2026
Recovery and readiness scores in 2026: HRV and resting heart rate inputs are validated, but the WHOOP, Oura and Garmin composite scores are not.
Read article →
Garmin Edge 540 vs 840 2026: What the $100 Touchscreen Buys
Garmin Edge 540 vs 840 in 2026: same GNSS, battery and metrics; the $100 gap is the touchscreen and map storage. Verified specs and which to buy.
Read article →
DEXA vs Smart Scale Body Fat Accuracy 2026: How Far Off
DEXA vs smart scale body fat accuracy in 2026: scales underestimate fat mass by 2.2 to 4.4 kg vs DEXA. Verified studies and how to use a scale right.
Read article →
Fitbit vs Apple Watch 2026: Price, Subscription and Features
Fitbit vs Apple Watch in 2026: verified prices, the new Google Health Premium subscription, free tracking tiers and which to buy on iPhone versus Android.
Read article →
Garmin Connect vs intervals.icu 2026: Free Training Analysis
Garmin Connect vs intervals.icu in 2026: intervals.icu gives the free CTL/ATL/Form chart; Garmin recovery metrics are free, Connect+ adds AI on top.
Read article →
Garmin vs Apple Watch for Running 2026: GPS, Battery, Cost
Garmin Forerunner 970 vs Apple Watch Ultra 3 for running in 2026: Garmin wins GPS battery (21h vs 14h), both dual-frequency. Verified specs and prices.
Read article →
Garmin vs COROS 2026: Battery, GPS and Subscription Compared
Garmin vs COROS in 2026: verified battery life, dual-frequency GPS and subscription facts. COROS PACE 3 runs 38h GPS; Garmin adds the bigger ecosystem.
Read article →
Hevy vs Strong vs Fitbod 2026: Pricing and Features Compared
Hevy vs Strong vs Fitbod in 2026: verified prices and free tiers. Hevy and Strong are loggers, Fitbod generates workouts. Which gym app to pick.
Read article →
InBody vs DEXA Accuracy 2026: Which Body-Comp Scan to Trust
InBody vs DEXA accuracy in 2026: DEXA is the reference method; InBody is precise but offset with wide limits of agreement. Verified studies and cost.
Read article →
Lose It vs MyFitnessPal vs Lifesum 2026: Best Calorie App
Lose It vs MyFitnessPal vs Lifesum in 2026: Lose It is the cheapest Premium, MyFitnessPal gates the barcode scanner. Verified prices and free tiers.
Read article →
MyFitnessPal vs Cronometer 2026: Micronutrients, Accuracy, Cost
MyFitnessPal vs Cronometer 2026: lab-analysed micronutrient data (84 nutrients free) vs crowd-sourced breadth, with verified Gold pricing and free-tier limits.
Read article →
MyFitnessPal vs MacroFactor 2026: Adaptive TDEE, Accuracy, Cost
MyFitnessPal vs MacroFactor in 2026: adaptive weight-trend TDEE vs static formula, verified pricing ($71.99 vs €79.99/yr), and the 3-year cost math compared.
Read article →
Oura Ring vs Apple Watch Sleep Tracking 2026
Oura Ring vs Apple Watch sleep tracking in 2026: Oura wins stage accuracy (75-91% vs PSG) and battery; Apple Watch is free. Verified studies and pricing.
Read article →
Pixel Watch vs Apple Watch 2026: Price, Fitness and Pairing
Pixel Watch vs Apple Watch in 2026: verified prices, Google Health subscription facts, battery life and the Android-versus-iPhone pairing that decides it.
Read article →
Polar vs Garmin Heart Rate Accuracy 2026: H10 vs HRM-Pro Plus
Polar vs Garmin heart-rate accuracy in 2026: H10 and HRM-Pro Plus are both research-grade ECG chest straps, with validation data and how to pick.
Read article →
RENPHO vs eufy Smart Scale 2026: Best Budget Body-Fat Scale
RENPHO vs eufy smart scale in 2026: eufy discontinued its US scale line, RENPHO Elis is current. Verified specs, prices, and BIA accuracy reality.
Read article →
RP Hypertrophy App vs Fitbod 2026: Which Strength App
RP Hypertrophy App vs Fitbod in 2026: RP is $299.99/yr volume-landmark periodization; Fitbod is $95.99/yr recovery-modeled AI workouts. Which fits you.
Read article →
Runna Pricing 2026 vs Free Garmin Coach: Plans Compared
Runna pricing 2026 is $19.99/mo or $119.99/yr with a 7-day trial vs free Garmin Coach. Distances, strength and mobility, and watch support compared.
Read article →
Skinfold Calipers vs BIA Scale vs DEXA: Accuracy 2026
Skinfold caliper vs BIA scale vs DEXA accuracy in 2026: DEXA ~1-2%, skinfolds ~3.5%, and why smart scales underestimate body fat. Backed by validation studies.
Read article →
Strava vs TrainingPeaks 2026: Prices & Plans Compared
Strava vs TrainingPeaks 2026: Strava costs $11.99/mo or $79.99/yr; TrainingPeaks Premium is $19.95/mo or $134.99/yr, and the PMC is a Premium feature.
Read article →
Ultrahuman Ring vs Oura Ring 2026: Subscription and Accuracy
Ultrahuman Ring vs Oura Ring in 2026: the Ring Air is a one-time $349 with no subscription; Oura adds a membership. Multi-year cost math and validation data.
Read article →
Whoop vs Garmin for Recovery 2026: Do You Need Both?
Whoop vs Garmin for recovery in 2026: Garmin's Body Battery and HRV Status are free with the device; Whoop is €199/yr+. Verified pricing and score differences.
Read article →
Whoop vs Oura Ring: Two-Way Head-to-Head 2026
Whoop vs Oura Ring head-to-head: Oura edges HRV and sleep accuracy, Whoop wins continuous strain. Verified pricing and full 3-year cost of ownership.
Read article →
Renpho vs Withings Smart Scale 2026: Which to Buy
Renpho vs Withings smart scales: RENPHO Elis is budget Bluetooth, Withings Body Smart is $129.95 Wi-Fi, and both body-fat readings are BIA estimates.
Read article →
Whoop vs Oura vs Garmin: Cost & Subscriptions 2026
Whoop 5.0 vs Oura Ring 4 vs Garmin in 2026: Whoop from EUR 199/yr, Oura $349 plus $5.99/mo, Garmin free. Verified prices, battery, and sensors compared.
Read article →
TrainerRoad vs Zwift vs Wahoo SYSTM 2026: Price and Focus
TrainerRoad vs Zwift vs Wahoo SYSTM in 2026: verified subscription prices and focus. Wahoo SYSTM is cheapest; TrainerRoad coaches, Zwift motivates.
Read article →
Strava vs Garmin Connect vs Intervals.icu 2026
Strava vs Garmin Connect vs Intervals.icu 2026: Strava paywalls its analysis behind a subscription; Garmin Connect and intervals.icu keep core analysis free.
Read article →
Eight Sleep Pod vs Sleep Number 2026: Cost and Subscription
Eight Sleep Pod vs Sleep Number in 2026: verified prices and the subscription gap. Eight Sleep needs a membership; Sleep Number tracking is free.
Read article →
Wahoo ELEMNT vs Garmin Edge 2026: Bike Computers Compared
Wahoo ELEMNT vs Garmin Edge in 2026: verified bike-computer prices, battery, and GPS. Wahoo is simpler; Garmin packs the deepest feature set.
Read article →
MacroFactor vs Cronometer 2026: Adaptive TDEE vs Micros
MacroFactor vs Cronometer in 2026: verified prices and free tiers. MacroFactor has adaptive TDEE coaching; Cronometer tracks micronutrients deeper.
Read article →
Garmin Forerunner 970 vs COROS PACE 4 2026: Battery, Maps
Garmin Forerunner 970 vs COROS PACE 4 in 2026: verified price, battery, and maps. The PACE 4 wins value and battery; the 970 adds maps and ECG.
Read article →
Apple Watch Ultra 3 vs Garmin Forerunner 970 2026
Apple Watch Ultra 3 vs Garmin Forerunner 970 in 2026: verified price and battery. Ultra 3 is iPhone-only with apps; the 970 runs weeks and Android.
Read article →
Apple Watch Ultra 3 vs Garmin Fenix 8 2026: Battery, Price
Apple Watch Ultra 3 vs Garmin fenix 8 in 2026: verified price and battery. Ultra 3 is cheaper and iPhone-only; the fenix 8 lasts weeks and dives.
Read article →
Garmin Forerunner 970 vs 965 2026: ECG, Battery, Price
Garmin Forerunner 970 vs 965 in 2026: verified price, battery, and ECG. The 970 adds ECG and a flashlight; the 965 lasts longer for $250 less.
Read article →
COROS PACE Pro vs Garmin Forerunner 265 2026: Maps, Battery
COROS PACE Pro vs Garmin Forerunner 265 in 2026: verified price, maps, and battery. The PACE Pro adds offline maps for $100 less; FR265 streams music.
Read article →
COROS PACE 4 vs Garmin Forerunner 165 2026: GPS, Battery
COROS PACE 4 vs Garmin Forerunner 165 in 2026: verified price, GPS, and battery. At $249 the PACE 4 has dual-band GPS and double the battery.
Read article →
Ultrahuman Ring PRO vs Oura Ring 4 2026: Subscription, Battery
Ultrahuman Ring PRO vs Oura Ring 4 in 2026: verified price and battery. The Ring PRO drops the subscription and lasts 15 days; Oura has the validation.
Read article →
WHOOP 5 vs Garmin CIRQA 2026: What We Actually Know
WHOOP 5 vs Garmin CIRQA in 2026: WHOOP is verified and subscription-only; the CIRQA is unannounced, so its price and specs are leaks, not confirmed.
Read article →
Is WHOOP Accurate in 2026? What the Studies Show
Is WHOOP accurate in 2026? Peer-reviewed studies say yes for resting and overnight HR and HRV, but wrist sensors lag a chest strap during intervals.
Read article →
Is the Oura Ring Accurate in 2026? What the Studies Show
Is the Oura Ring accurate in 2026? Peer-reviewed studies rate it among the best for sleep and overnight HRV, but it is not a workout heart-rate device.
Read article →
Are Smart Scales Accurate in 2026? Weight vs Body Fat
Are smart scales accurate in 2026? Studies show they are reliable for weight but inaccurate for body-fat percentage versus DEXA. Read the trend.
Read article →
Best Running Watches 2026: Picks by Tier and Budget
Best running watches 2026: the COROS PACE 4 wins value at $249, with picks for maps, the Garmin ecosystem, and the flagship Forerunner 970.
Read article →
Best Smart Rings 2026: Oura vs Ultrahuman and the Picks
Best smart rings 2026: the Oura Ring 4 wins overall on validated sleep data; the Ultrahuman Ring PRO is the best subscription-free pick.
Read article →
Best Recovery Trackers 2026: WHOOP vs Oura vs Garmin
Best recovery trackers 2026: WHOOP for daily coaching, the Oura Ring 4 for validated sleep and HRV, or a Garmin watch for recovery with no subscription.
Read article →
Garmin Edge 1050 vs 540 2026: Touchscreen, Battery, Price
Garmin Edge 1050 vs 540 in 2026: verified price, battery, and display. The 540 wins value and battery; the 1050 adds a big touchscreen and speaker.
Read article →
WHOOP 5 vs Ultrahuman Ring PRO 2026: Cost, Battery
WHOOP 5 vs Ultrahuman Ring PRO in 2026: verified price, battery, and accuracy. WHOOP wins coaching; the Ring PRO is subscription-free at $479.
Read article →
Polar H10 vs Garmin HRM 600 2026: Accuracy, Features
Polar H10 vs Garmin HRM 600 in 2026: verified price and features. Both are ECG straps; the H10 is cheaper, the HRM 600 adds running dynamics.
Read article →
Garmin fenix 8 vs Enduro 3 2026: Battery, Price, Specs
Garmin fenix 8 vs Enduro 3 in 2026: verified price, battery, and features. The Enduro 3 wins battery and price; the fenix 8 adds AMOLED and dive.
Read article →
Zwift vs MyWhoosh 2026: Free vs Paid Indoor Cycling
Zwift vs MyWhoosh in 2026: verified pricing and features. Zwift wins community and racing depth; MyWhoosh is a capable free indoor-cycling app.
Read article →
Eight Sleep Pod 5 vs Oura Ring 4 2026: Sleep Compared
Eight Sleep Pod 5 vs Oura Ring 4 in 2026: verified prices. The Pod 5 changes your sleep with temperature; the Oura Ring 4 measures it best.
Read article →
Is Apple Watch Calorie Count Accurate? (2026 Evidence)
Is the Apple Watch calorie count accurate in 2026? The best wrist estimator in named research, but still off ~27%; read it as a trend, not truth.
Read article →
Is Garmin Calorie Count Accurate? (2026 Evidence)
Is Garmin's calorie count accurate in 2026? A named validation found ~19% error and overestimation; trust it as a trend, not a measurement.
Read article →
Best Chest Strap Heart Rate Monitors 2026: Top Picks
Best chest strap heart rate monitors 2026: the Polar H10 wins overall, the Garmin HRM 600 for runners, the Wahoo TRACKR for a rechargeable battery.
Read article →
Opinionated analysis pieces
Methodology & analysis 8
How Many Sets Per Week for Hypertrophy? Dose-Response 2026
How many sets per week build muscle? The 2026 Pelland meta-regression maps the hypertrophy dose-response curve and turns it into weekly set targets.
Read article →
Deload Protocols: When the Math Says Stop and When It Says Tweak
Deload protocols in the literature: fatigue-driven vs periodised, where Wendler's TM math meets Helms's autoregulation, and the empirical cost.
Read article →
Epley, Brzycki, Lombardi, Lander: A Methodology Deep-Dive on 1RM Math
Epley, Brzycki, Lombardi, and Lander 1RM formulas: where each comes from, how the constants were chosen, and where they break above eight reps.
Read article →
Mifflin, Harris-Benedict, Cunningham: Resting Metabolism Methodology
Mifflin, Harris-Benedict, and Cunningham RMR equations: how each was derived, who the calibration cohort was, and the 5% Harris-Benedict overestimate.
Read article →
The Minetti Curve: Why Downhill Running Is Cheap Then Brutal
How Minetti's 2002 J Appl Physiol paper defines energy cost across grades, where the eccentric load tax dominates, and the practical pacing rule.
Read article →
Polarized, Pyramidal, and Threshold Training: The Distribution Argument
The 80/20 polarized model versus pyramidal and threshold distributions. Seiler 2010, Stoggl Sperlich 2014, and where Casado pyramidal data lands.
Read article →
Schoenfeld Volume Meta-Analyses and the Junk-Set Question
Schoenfeld 2017 dose-response meta and 2019 high-volume trial: what each showed, where junk sets begin, and the diminishing-returns slope for trained men.
Read article →
Wilks to IPF-GL to DOTS: The Coefficient Evolution Story
Why the IPF dropped Wilks in 2019, what the GL fit corrected, and why DOTS-style scoring is now the OpenPowerlifting default for raw lifters.
Read article →