Statistics

Average TDEE reference data: Dietary Guidelines calorie estimates by age, sex and activity, plus what measured energy-expenditure studies show.

Body composition statistics: body fat at each BMI by sex and age, muscle mass by sex, how accurate each measurement method is, and the FFMI 25 line.

Calorie deficit statistics: average loss rates, adherence, metabolic adaptation and long-term maintenance, each figure with the study it comes from.

Creatine statistics: strength and power gains, dosing, safety and the evidence on cognition, each figure with the peer-reviewed study it comes from.

Fitness app statistics: adoption, effects on activity, retention and results from clinical trials, each figure with the study or survey it comes from.

Flexibility statistics: range-of-motion norms, stretching methods compared, changes with age and links to injury, each figure with its source.

Gym membership statistics from the Health & Fitness Association (formerly IHRSA): US member counts, growth and demographics, each with its source.

Home gym statistics: how band, bodyweight and home-based training compare with gym training, home rehabilitation results and what keeps people training.

Hydration statistics: IOM water requirements, sweat rates and sodium losses, how dehydration affects performance, and hyponatremia risk, each with its source.

Intermittent fasting statistics: weight loss, metabolic effects, adherence and head-to-head trials against daily calorie restriction, each with a source.

Marathon statistics: average finishing times, world records, age trends, training mileage and DNF rates, each figure with the source it comes from.

Meal prep statistics: home cooking, portion size, meal planning and food-tracking accuracy, each figure with the study it comes from.

Mobility and injury statistics: how common injuries are, risk factors, what interventions achieve and recovery times, each figure with its source.

Obesity statistics: US prevalence from CDC data, global trends, health costs, mortality risk and treatment outcomes, each figure with its source.

One-rep max statistics: squat, bench and deadlift norms from 809,986 drug-tested powerlifting entries, 1RM formula accuracy and strength loss with age.

Overtraining statistics: how common it is in athletes, recovery times, hormonal markers and screening tools, each figure with the study behind it.

Periodization statistics from meta-analyses: periodized vs non-periodized, linear vs undulating and block models, volume, frequency, deloads and tapering.

Protein intake statistics: the RDA, intakes that maximise muscle gain, satiety and plant vs animal protein, each figure with the study behind it.

Running statistics: mortality reduction, weekly mileage, injury rates, VO2 max norms and finishing-time benchmarks, each figure with its source.

Sleep statistics: how many people sleep too little, effects on testosterone, muscle protein synthesis and performance, each figure with its source.

Strength training statistics: participation, mortality reduction, volume, frequency and failure research, and health effects, each with its source.

Supplement industry statistics: US use by age and sex, the evidence for each major supplement, emergency-visit and safety findings, and FDA rules.

Weight loss statistics: how many people keep weight off, real-world deficit outcomes, predictors of success and treatment results, each with a source.