Start with this core workout, follow with exercises for legs and arms, then repeat the entire circuit twice.
Sit on a swiss ball
with the small of your back supporting your weight on the ball and legs bent at a 90 degree angle in front of you. Then, holding a five-pound weight with both hands, place it behind your head and perform 15-20 crunches.
Lie on your back and place feet shoulder-width apart on the swiss ball. Keep your back flat and arms at your sides. Slowly lift your hips, making a straight line from your chest to your knees and return. Repeat 15-20 times.
On your stomach, keeping your core muscles tight and engaged, hold plank
for 60 seconds, relax and repeat 10 times.More Fitness! Get a Star-Worthy Middle in 3 Weeks