* Circuit through the following exercises and take a 30-second break between exercises * Complete 2-3 sets in total * Take three minutes between sets Med-Ball V-Sits 1. Start by lying on your back with your arms over your head and a med-ball between your feet. 2. Lift the med-ball by bending at the waist. Keep your legs straight. At the same time, lift your arms toward the med-ball. 3. Touch the med-ball with your hands and return to the stating position. Plank with Leg Lifts 1. Start by lying on your stomach with your hands together and forearms in contact with the ground. 2. Push yourself onto your forearms and toes. Keep your body in a straight line from your head to your heels with your core braced. 3. Hold for this position for 30 seconds. 4. Left your left foot from the ground and hold for another 15 seconds. 5. Return your left foot to the floor and lift your right foot for 15 seconds. Eccentric Bicycle Crunches 1. Start by lying on your back with your feet in the air and knees bent at about 90 degrees. 2. Slowly straighten one of your legs while keeping your back flat against the ground. It should take 4-5 seconds to completely straighten your leg. 3. When your heel is an inch over the ground, hold for a second and then return to the starting position. 4. Repeat on the other side and complete 10 reps on each side. Russian Twisters 1. Sit with your feet off the ground and hold a weight plate, med-ball, or other heavy object. 2. Keep your arms straight and tap the weight to the floor on your left. 3. Tap the weight to the floor on your right side. 4. Repeat 10 times on each side.