4. Lunges:
Works your quadriceps, hips, inner and outer thighs
Balance yourself on your left leg and place your right leg on the ball, keeping it close to your left leg. Now extend the left leg to the side rolling the ball out and simultaneously bending your left knee, pushing your hip backwards. Straighten the leg and bring the ball back in towards the left leg.
16 reps, rest and repeat. Then change legs and do 2 sets.
Also read: Weight loss plan for the excessively overweight