Want a strong core without spending hours at the gym or doing endless crunches? Fitness experts share 5 key moves you can do ...

Place the toes of one foot on a step, weight plate, or other slightly raised surface; your heel will hang off the back of it.

Leg raises hits the lower abs perfectly without putting stress on the neck or back like crunches do. Lie flat on your back ...

Engage core and press through heels and upper back to lift hips a couple of inches off floor. Bend knees and use hamstrings ...