Lie on your back, arms by your sides and legs flat on the floor. Engage your abs and lift your legs until they are directly above your hips. Keeping your lower back pressed firmly into floor, lower your legs to the starting position.

Muscle group: Abdominal

Steps

3 sets of 15 reps

Tips

The key is to prevent your pelvis from moving," says Brookes. "Resistance targets the rectus abdominus muscles (your inner six-pack) better than crunching."

Make it easier Remember GCSE physics? Lighten the load by bending your legs and shortening the lever.
Make it harder Take 5 seconds to lower your legs with each rep.

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