3A Single-Leg Bridge
Sets: 2 Reps: 12 Rest: 30 sec.
Lie on your back on the floor and bend one knee so that your foot is flat on the floor . Keeping your opposite leg straight, push your foot into the floor, raising your hips until both thighs are in line with each other . Reverse the motion to return to the starting position. That's one rep. Complete all your reps on one leg, and then switch legs and repeat.