0:33

Muscle mass starts declining around 30 at about 0.5–1% per year, then accelerates after 50 with losses of 10–14% per decade. Strength drops faster than muscle after 50. Physical activity and enough protein are what actually matter for keeping muscle as you age.

Questions this video answers

About 0.5–1% per year.

Approximately 10–14% per decade.

Strength declines faster than muscle mass (i.e., more strength loss per year than muscle mass loss).

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