A study suggests that only an hour of strength training a week can build muscle. Here's what to know—and how to craft your own muscle-boosting routine.

A new study in trained lifters suggests one hard set per exercise, twice a week, may deliver more muscle than most people expect. Volume is the gold standard in muscle building. Bodybuilders chase it, ...

The answer depends on whether you're looking to build muscle or to focus on running or longevity.