Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? For most of my life I’ve worked out fairly consistently, running outside, ...

Sit-ups and crunches both target your core muscles, but work differently. You can use both exercises to build strength, endurance, and control.

While many workout regimens flame out as quickly as it took them to start trending, others stand the test of time. Exercises like tai chi, running, swimming, hiking and yoga, for instance, have been ...