Lie on your back and lift head slightly off the floor. Pull thighs up to chest. Then slowly straighten legs back to the floor until a few inches from the floor. Hold them for a second then repeat bringing them up. Remember not to lift head too far up or arch your back.
Lie on the floor with feet flat and knees bent. Raise one leg off the ground and pull the knee to the chest. With one foot on the floor, lift the hip upward and raise glutes off the ground. Try to extend as far as possible, hold it there and then lower back to the start position.
Lie flat on your back and hands behind your head. Bent your knees and turn them down flat on the floor. Raise the upper body up until shoulder blades off the ground and hold it for a second. Then slowly lower to start position. Repeat.