Articles
137 articles on strength, endurance, nutrition and body composition, with 732 citations between them. Every number traces to a named study, and every caveat is dated.
Pillar guides 25
The long references: a whole subject, its studies and its limits
- 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.
11-minute read, 6 sources
- 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.
12-minute read, 5 sources
- 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.
11-minute read, 8 sources
- 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.
11-minute read, 6 sources
- Evidence-Based Hypertrophy Program: Sets, Reps, Frequency
Evidence-based hypertrophy program: 10-20 hard sets per muscle a week, 30-85% 1RM near failure, frequency to spread volume, per Pelland 2026 and Schoenfeld.
15-minute read, 12 sources
- 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.
11-minute read, 6 sources
- Protein for Muscle Gain: 1.6 g/kg (Morton 2018)
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.
12-minute read, 7 sources
- 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.
11-minute read, 7 sources
- 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.
11-minute read, 6 sources
- FFMI 25 Natural Limit: The Kouri 1995 Study, Reappraised
FFMI 25 as the natural muscular limit: what Kouri's 1995 study of 157 male athletes measured, and what later collegiate cohorts show about the upper end.
11-minute read, 5 sources
- 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.
11-minute read, 6 sources
- Zone 2 Training: Find It With Lactate, Heart Rate, Talk Test
Zone 2 training sits just below the first lactate threshold. Find it with a lactate meter, heart rate or the talk test, and what 2025 reviews say it does.
13-minute read, 12 sources
- 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.
13-minute read, 8 sources
- 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.
11-minute read, 7 sources
- 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.
11-minute read, 6 sources
- 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.
10-minute read, 6 sources
- 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.
10-minute read, 6 sources
- Powerlifting Peaking Math
Powerlifting peaking compared: Smolov, Sheiko, and Texas Method — volume curves, recovery demands, and the meet-prep windows each handles best.
12-minute read, 7 sources
- 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.
11-minute read, 6 sources
- Concurrent Training Interference: Does Cardio Hurt Gains?
Concurrent training interference is small: in 43 studies cardio did not blunt muscle growth or max strength, but explosive strength lagged (Schumann 2022).
13-minute read, 13 sources
- 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.
12-minute read, 8 sources
- Polarized vs Threshold Training: 2026 Evidence Review
Polarized vs threshold training compared: the Seiler 80/20 model, Stoggl 2014 and Filipas 2022 on what wins for VO2 max and when threshold work pays off.
13-minute read, 12 sources
- 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.
12-minute read, 9 sources
- 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.
16-minute read, 14 sources
- TDEE Maintenance Calorie Reference: Age and Activity Level 2026
TDEE maintenance calories by Mifflin-St Jeor for ages 20–60 and five activity levels: male 80 kg/178 cm and female 65 kg/165 cm grids, computed at build time.
9-minute read, 5 sources
Guides 34
One question each, answered with sourced numbers
- 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.
8-minute read, 5 sources
- 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.
7-minute read, 4 sources
- 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.
8-minute read, 4 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 4 sources
- 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.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
6-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
7-minute read, 4 sources
- FFMI for the Intermediate Female Lifter: A 60kg/165cm/22% Walkthrough
FFMI for a 60kg, 165cm, 22% body-fat female intermediate lifter: adjusted 18.14 walkthrough, percentile context, and why the Kouri 25 cap was male-only.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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%.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
6-minute read, 3 sources
- 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.
6-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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.
8-minute read, 3 sources
- 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.
6-minute read, 4 sources
- 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.
7-minute read, 3 sources
- 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.
6-minute read, 3 sources
- 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.
7-minute read, 3 sources
- 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 200.2 kg (likely 183-221 kg). The strength-speed zone read and where bar speed lies.
7-minute read, 3 sources
- 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, right at the Cooper Clinic median. The formula, calibration and caveats.
6-minute read, 3 sources
- 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.
8-minute read, 7 sources
- 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.
8-minute read, 7 sources
- Smart Scale Body Fat Accuracy: Withings vs Renpho vs Eufy
Smart scale body fat accuracy: Withings, Renpho and Eufy all use BIA, which missed DEXA by a median 2-4 kg of fat mass in studies. Weight is accurate.
8-minute read, 6 sources
- Whoop vs Oura vs Garmin: Which Is Most Accurate for HRV?
Whoop vs Oura vs Garmin HRV accuracy: against ECG over 536 nights, Oura scored CCC 0.97-0.99, WHOOP 0.94 and Garmin 0.87. Plus sleep data and Oura Ring 5.
9-minute read, 8 sources
- How to Stretch Lower Back Safely: 5 Physio-Backed Moves
Stretch your lower back with knee-to-chest, pelvic tilts and heel slides from the UK physio body, plus NHS advice on staying active and red-flag symptoms.
4-minute read, 6 sources
Gear and app comparisons 73
Watches, rings, scales and apps, tested against the research
- 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.
8-minute read, 7 sources
- 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.
7-minute read, 7 sources
- 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.
7-minute read, 4 sources
- 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.
7-minute read, 4 sources
- 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.
7-minute read, 4 sources
- 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.
8-minute read, 4 sources
- 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.
8-minute read, 4 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 4 sources
- 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.
8-minute read, 6 sources
- 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.
8-minute read, 9 sources
- 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.
7-minute read, 5 sources
- Best Smart Scales 2026: Renpho vs Withings and the Picks
Best smart scales 2026: every one shares the same bioimpedance body-fat method, so price and app decide it. Renpho, Withings and the Apple Health sync fee.
8-minute read, 6 sources
- Best Sleep Trackers 2026: Oura, Whoop, Eight Sleep Compared
Best sleep trackers 2026: the Oura Ring 5 leads sleep-first rings, Whoop folds sleep into recovery, Eight Sleep's Pod 6 acts on it. Verified prices.
8-minute read, 6 sources
- Best Heart Rate Monitors 2026: Chest Straps vs Armbands
Best heart rate monitors 2026: Polar H10 leads chest straps, the Garmin HRM 600 suits Garmin owners, Verity Sense for armbands. Verified prices.
8-minute read, 6 sources
- Best Cycling Computers 2026: Garmin Edge vs Wahoo ELEMNT
Best cycling computers 2026: the Wahoo ROAM v3 leads on value and battery, the Garmin Edge 850 on features. Verified prices, battery and which tier to buy.
8-minute read, 6 sources
- 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.
8-minute read, 5 sources
- Chest Strap vs Optical HR Accuracy: Strap, Armband, Wrist
Chest strap vs optical heart rate: ECG straps track within 1-4% of ECG, an arm optical sensor nearly matches them, and wrist readings can miss by 15 bpm.
7-minute read, 7 sources
- How Accurate Is Wrist Heart Rate? What Studies Show
How accurate is wrist heart rate? Good watches average 1-5 bpm from an ECG strap in lab studies, but single readings can miss by 15 bpm. Data by device.
8-minute read, 7 sources
- 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.
8-minute read, 5 sources
- 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.
8-minute read, 5 sources
- Garmin Edge 550 vs 850 2026: Touchscreen, Battery, Price
Garmin Edge 550 vs 850 in 2026: verified price, battery and controls. The 550 is $499.99 with buttons; the 850 adds a touchscreen for $100 more.
6-minute read, 4 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 4 sources
- Garmin vs Apple Watch for Running 2026: GPS, Battery, Cost
Garmin Forerunner 970 vs Apple Watch Ultra 4 for running in 2026: Garmin wins full-accuracy GPS battery (21h vs 18h); both are dual-frequency. Verified specs.
7-minute read, 4 sources
- Garmin vs COROS 2026: Battery, GPS and Subscription Compared
Garmin vs COROS in 2026: the COROS PACE 4 runs 41h GPS with dual-band, the Forerunner 70 leans on Garmin's coaching and ecosystem, and Connect+ is optional.
8-minute read, 6 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 4 sources
- 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.
6-minute read, 4 sources
- MyFitnessPal vs MacroFactor 2026: Adaptive TDEE, Accuracy, Cost
MyFitnessPal vs MacroFactor in 2026: adaptive weight-trend TDEE vs static formula, verified US pricing ($71.99 vs $79.99/yr), and the 3-year cost math.
7-minute read, 4 sources
- 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.
7-minute read, 5 sources
- 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.
6-minute read, 5 sources
- Polar vs Garmin Heart Rate Accuracy: H10 vs HRM-Pro Plus
Polar vs Garmin heart rate accuracy: the H10 and HRM-Pro chest straps tie near ECG, and on the wrist Garmin beat Polar in a 2026 ten-device validation study.
8-minute read, 7 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 4 sources
- 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.
7-minute read, 4 sources
- Skinfold vs BIA Scale vs DEXA: Which Body Fat Test Is Best?
Skinfold vs BIA scale vs DEXA: DEXA repeats within 1%, skinfold equations err about 3.2-3.5 body-fat points, and smart scales missed fat mass by 2-4 kg.
7-minute read, 6 sources
- 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.
7-minute read, 6 sources
- Garmin Forerunner 570 vs 265 vs Coros Pace Pro 2026
Garmin Forerunner 570 vs 265 vs Coros Pace Pro in 2026: verified price, battery, maps, and GPS. The $299 Pace Pro adds offline maps the Garmins skip.
7-minute read, 7 sources
- 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 and up. Verified pricing and scores.
7-minute read, 5 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 4 sources
- 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.
7-minute read, 4 sources
- 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.
7-minute read, 5 sources
- 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.
6-minute read, 4 sources
- 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.
8-minute read, 5 sources
- Apple Watch Ultra 4 vs Garmin Forerunner 970 2026
Apple Watch Ultra 4 vs Garmin Forerunner 970 in 2026: verified price and battery. The Ultra 4 is iPhone-only; the 970 lasts two weeks and pairs with Android.
8-minute read, 7 sources
- Apple Watch Ultra 4 vs Garmin fēnix 9 2026: Battery, Price
Apple Watch Ultra 4 vs Garmin fēnix 9 in 2026: verified price and battery. The Ultra 4 is $799 and iPhone-only; the fēnix 9 lasts weeks and pairs with Android.
8-minute read, 7 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 5 sources
- COROS PACE 4 vs Garmin Forerunner 165 and 170 (2026)
COROS PACE 4 vs Garmin Forerunner 165, its successor the 170, and the 70: verified price, GPS and battery. The PACE 4 has dual-band GPS and maps.
7-minute read, 7 sources
- Ultrahuman Ring PRO vs Oura Ring 5 2026: Subscription, Battery
Ultrahuman Ring PRO vs Oura Ring 5 in 2026: verified price and battery. The Ring PRO drops the subscription and lasts 15 days; Oura has the validation.
7-minute read, 7 sources
- WHOOP 5.0 vs Garmin CIRQA 2026: Price, Battery, Plans
WHOOP 5.0 vs Garmin CIRQA in 2026: verified prices and battery. The CIRQA is $199.99 with no subscription; WHOOP bundles the band into a $199-$359 yearly plan.
7-minute read, 6 sources
- 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.
7-minute read, 4 sources
- 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.
7-minute read, 4 sources
- 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.
6-minute read, 3 sources
- 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.
8-minute read, 6 sources
- Best Smart Rings 2026: Oura vs Ultrahuman and the Picks
Best smart rings 2026: the Oura Ring 5 wins overall on validated sleep data; the Ultrahuman Ring PRO is the best subscription-free pick. Verified prices.
7-minute read, 5 sources
- Best Recovery Trackers 2026: WHOOP vs Oura vs Garmin
Best recovery trackers 2026: WHOOP for daily coaching, the Oura Ring 5 for validated sleep and HRV, Garmin's CIRQA band or a watch with no subscription.
7-minute read, 5 sources
- Garmin Edge 1050 vs 550 2026: Screen, Battery, Price
Garmin Edge 1050 vs 550 in 2026: verified price, battery and display. The 550 is $200 cheaper; the 1050 adds a big touchscreen, a speaker and longer battery.
6-minute read, 5 sources
- 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.
7-minute read, 5 sources
- 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.
7-minute read, 4 sources
- Garmin fēnix 9 vs Enduro 4 2026: Battery, Price, Specs
Garmin fēnix 9 vs Enduro 4 in 2026: verified price and battery. The Enduro 4 wins on battery, weight and price; the fēnix 9 adds AMOLED, a speaker and diving.
7-minute read, 7 sources
- COROS APEX 4 vs Garmin fenix 8 2026
COROS APEX 4 vs Garmin fenix 8 in 2026: verified price, battery and display. The APEX 4 costs about half and lasts longer; the fenix 8 adds AMOLED and dive.
8-minute read, 6 sources
- 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.
7-minute read, 4 sources
- Eight Sleep Pod 6 vs Oura Ring 5 2026: Sleep Compared
Eight Sleep Pod 6 vs Oura Ring 5 in 2026: verified prices and plans. The Pod 6 changes your sleep with bed temperature; the Oura Ring 5 measures it best.
7-minute read, 6 sources
- 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.
7-minute read, 3 sources
- 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.
7-minute read, 3 sources
- RingConn vs Oura Ring: Accuracy, Battery and Price Compared
RingConn vs Oura Ring compared on validation studies, battery and price: RingConn lasts up to 14 days with no subscription; Oura has stronger accuracy data.
4-minute read, 11 sources
- Whoop vs Apple Watch: HRV, Sleep and Heart Rate Accuracy
Whoop vs Apple Watch on accuracy: WHOOP led for overnight HRV in a head-to-head study, Apple Watch for lifting heart rate and sleep. Prices and battery too.
5-minute read, 9 sources
Method and analysis 5
How the formulas compare, and where they break
- How Many Sets Per Week for Hypertrophy? 10-20 Per Muscle
How many sets per week for hypertrophy: 10-20 hard sets per muscle. Pelland 2026 (67 studies) shows growth keeps rising past that, with diminishing returns.
9-minute read, 5 sources
- 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.
8-minute read, 4 sources
- 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.
8-minute read, 4 sources
- 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.
8-minute read, 4 sources
- Schoenfeld Sets Per Week: 2017 Dose-Response and Junk Sets
Schoenfeld sets per week: the 2017 meta-analysis found 0.37% more growth per weekly set, 10+ sets highest; his 2019 trial grew more on 15 sets, not stronger.
9-minute read, 6 sources