Blog
Walking step length by age: normal ranges and what short steps mean
Find normal walking step length values by age and gender with charts. Learn what short steps indicate and when to take action for better mobility.
Best exercise after 40: a science-based guide by sport
Discover the best exercise after 40 backed by science. Sport-by-sport breakdown covering strength, cardio, flexibility, and how to slow biological aging.
Best sports for longevity: what the science actually says
Best sports for longevity, ranked by Copenhagen data, social connection, cognitive challenge, variable intensity, and Apple Watch metrics to track.
Climbing and grip strength: the longevity biomarker you train without knowing
Learn why grip strength predicts longevity, how climbing trains it, and how to start safely with recovery, balance, and biological-age tracking.
CrossFit after 40: when high intensity ages you faster
CrossFit after 40 can build strength, VO2 max, and community, but only when intensity matches recovery, joints, HRV, and sleep. Learn how to dose it.
Cycling and immune aging: the King's College study that changed everything
Cycling may help preserve immune function with age. Learn what the King's College cyclist study found about thymic output, T cells, IL-6, and training.
Exercise and joint health after 40: what helps, what hurts
Learn which exercises protect joints after 40, which habits raise osteoarthritis risk, and how strength, recovery, weight, and mobility support cartilage.
The complete exercise guide for longevity: what science recommends
Science-backed exercise plan for longevity: weekly cardio, strength, zone 2, VO2 max, mobility, recovery, and how to adapt training by decade.
Heart rate zones by sport: how to train smarter
Learn how heart rate zones differ across running, cycling, swimming, tennis, rowing, and more. Sport-specific zone targets, Apple Watch tips, and training strategies backed by science.