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V sit-ups work the coveted six pack muscles, the deep-lying transverse abdominis, the hip flexors, and the obliques.
8 Sit Up Alternatives That Are Safe and Effective
8 Sit Up Alternatives That Are Safe and Effective
How many sit-ups to do in a day to carve out abs?
How to Do a Jack Knife Sit Up: 9 Steps (with Pictures) - wikiHow
7-Minute Ab Routine
How to Do an L-Sit (and Why You Should)
How to Do the Sit-Up
8 Sit Up Alternatives That Are Safe and Effective
You need strong core muscles to maintain good balance, prevent