I ditched sit-ups for this standing ab exercise for a week — here's what happened to my core
Place your hands by your temples, with your elbows pointing out to the side. Lift your left knee, and at the same time, bend ...
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Sit ups are falling out of favor — what does the research show?
Sit-ups often come to mind when you think about working your abs or strengthening your core. It’s one of the most old-school, well-known exercises for ab-shredding, but recently, it’s become ...