“Sit-ups also engage the hip flexors, leg and abdominal muscles, chest, neck, and low back,” she says. This is why, after a few sets of sit-ups, you may feel like you’ve just finished a full ...

Answer: Full sit-ups are not the type of abdominal exercise I’d recommend. They can injure your back and aren’t truly effective, because you use muscles other than the abdominals to do most of ...

BeWOW: The Fast Full-Body Workout You Need to Try By Audrey McKenna Hasse · 4/21/2014, 1:30 p.m. Get wellness tips, workout trends, healthy eating, and more delivered right to your inbox with our ...

Sit-ups are a classic ab exercise that requires a lot of core strength. Here are 6 variations of sit-ups to do for a flat belly.