Knee tucks work the deep stabilizing muscles in your core and the lower abs without putting too much pressure on your spine.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images I ...

The dead bug exercise doesn’t look intense at first. You’re lying on your back, moving your arms and legs in slow motion—nothing flashy about it. But after a ...

I swapped dead bugs for knee tucks to build deep core strength, and I'm glad I did.

The dead bug exercise may have a funny name, but it's a seriously effective move. The slow and controlled core strengthening exercise involves lying on your back and moving your arms and legs in a way ...

Keeping the back flat, lie supine on the floor, knees up, holding a stability ball between your hands and knees. Extend opposite arm and leg (left leg, right arm and vice versa). Repeat 10 to 12 reps ...