Building muscle depends on several factors and isn't something that'll happen overnight after just one workout.

Over the last year, NPR graphics reporter Daniel Wood — a busy dad of three — says he’s been able to maintain “a workout cadence I’ve never, ever had before.” The secret to his good exercise regime?

Muscle cramps are the worst. Whether it's a side stitch during a run or a rogue "charley horse" that wakes you up at 3 in the morning, cramps can be incredibly painful and annoying. Cramps seem to ...