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Sit-ups and the plank ... As a personal trainer who holds chair workout classes for seniors, I've seen for myself how seated exercises can strengthen the abs and deep core, too.

Grab a chair, have a seat and start exercising for stronger abs. That's what fitness trainer Rhonda Murphy has us doing in this week's "Workout!" ...

Start by sitting tall with hands on knees. Inhale deeply as you arch your back, lifting your chest up (cow pose). Exhale as ...

You may like You'll never do sit-ups again after trying these 5 dumbbell ab exercises — according to a personal trainer Ditch sit-ups — strengthen and define your core with 1 dumbbell and this ...