* Circuit through each exercise with a 30-second break between between them * Perform 2-3 sets in total * Take a three minute break between sets Side Plank 1. Start by lying on your right side with your elbow directly over your shoulder and your forearm pointing away from you. Stack your left foot over your right foot. 2. Lift your hips from the mat so that your body makes a straight line from your feet to your head. 3. Hold this position for 30 seconds to a minute. 4. Repeat on the other side. Crunches 1. Lie on your back with your feet in the air and knees bent at 90 degrees. Put your hands behind your head. 2. Crunch your upper body until your elbows touch your knees. 3. Return to the starting position and repeat for 20 reps. Plank 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 30 seconds to a minute Flutter Kicks 1. Lie face-up on a mat with your back flat against the mat and your feet off the ground. 2. Keep your legs straight and lift one foot about a foot off the ground without lifting your back from the mat. Keep your other heel about an inch from the ground. 3. Switch your feet and pause for a second. 4. Repeat for 10-20 reps on each side. Bicycle Crunches 1. Start in a crunch position. 2. Straighten one leg so that your heel is an inch off the ground. Touch your elbow on that side to your opposite knee. 3. Repeat on the other side.