Strength After 40
Resistance training, recovery, and cardio base-building. Mobility and injury-prevention content is planned; tools are landing first, same as every other pillar here.
One-Rep Max Calculator
Estimate your 1RM from any working set, with a %1RM training table for programming.
Heart Rate Zone Calculator
Karvonen-method training zones, including Zone 2, from age and resting heart rate.
Related
Creatine — the best-studied supplement for strength and muscle performance — has an evidence-rated profile in the Supplement Database. The Protein Calculator in Metabolic Health is also relevant if you’re training seriously.
Why strength training matters more after 40
From around midlife, adults gradually lose muscle mass and strength — a process called sarcopenia — and the decline speeds up with age. Strength predicts far more than how much you can lift: grip and leg strength are consistently linked with independence, fall risk, and mortality in older adults. Resistance training is the most effective tool for slowing that decline at any age.
Cardio matters too. Most of the aerobic benefit for health comes from steady, easy-to-moderate work (Zone 2), with a smaller amount of hard interval training on top. The calculators here help with both sides: setting working weights from an estimated one-rep max, and finding the heart rate ranges for each training zone.