The “zone zero” fitness trend promotes very low-intensity movement, like walking and housework. Here’s what it can — and can’t — do for you.

Even beginners can do this simple, low-impact ab workout every day to strengthen their deep core and reduce back pain.

Most people think running is the best way to fire up your furnace and sizzle calories, but a new study from Harvard Medical School says you should cool off in the pool instead. Swimming works nearly ...