Longevity
Biomarkers, healthy aging, preventative health, and lifespan research.
103 articles in Longevity · page 1 of 9
Essential Fat: How Low Is Too Low?
Essential body fat is the minimum the body needs to function: about 3% for men and 12% for women. What happens when you drop below it, and why.
Read →How to Lower Body Fat Without Losing Muscle
How to lose fat, not muscle: the evidence on modest deficits, high protein, and resistance training that lets you drop body fat while holding lean mass.
Read →Navy vs DEXA vs Calipers vs BIA: Accuracy
The most accurate body fat measurement, compared: how DEXA, calipers, BIA scales, and the Navy tape method stack up on accuracy, cost, and consistency.
Read →Healthy Body Fat Percentage by Age and Sex
What's a healthy body fat percentage by age and sex? Category ranges for men and women, why the healthy range widens with age, and how to read your number.
Read →Testing Strength After 50: 1RM for Older Lifters
Strength testing for older adults: how to assess 1RM safely after 50, why familiarization and submaximal estimates matter, and alternatives to maxing.
Read →How to Test Your 1RM Safely (Without Maxing Out)
How to test your 1RM safely: a step-by-step warm-up and attempt protocol, spotter and readiness rules, plus when to estimate your one-rep max instead.
Read →RPE vs Percentage-Based Training: Which Wins?
RPE vs percentage-based training: what autoregulation research shows about strength gains, day-to-day readiness, and which method fits your lifting.
Read →Strength Standards: Is Your Bench, Squat, Deadlift Good?
Strength standards by bodyweight: how good is your bench, squat, and deadlift? Compare your lifts to untrained-to-elite benchmarks as bodyweight multiples.
Read →Training Percentages: How to Program Off Your 1RM
A practical 1RM percentage chart: how to turn your one-rep max into training loads for strength, hypertrophy, and endurance, with rep targets per zone.
Read →How Accurate Are 1RM Formulas? Epley vs Brzycki
How accurate are 1RM formulas? Compare Epley vs Brzycki, see where rep-based estimates drift, and why staying under 10 reps gives the best 1RM accuracy.
Read →VO2 Max After 50: Can You Still Improve It?
Can you improve VO2 max after 50? Yes. Much age-related decline is driven by inactivity, and structured aerobic training still improves fitness at any age.
Read →VO2 Max vs Zone 2: How They Fit Together
VO2 max vs zone 2: how a low-intensity aerobic base and high-intensity intervals fit together, and why polarized training beats doing either alone.
Read →