Tone your lower abdominal muscles with the abdominal hold. Start out sitting on the edge of a firm chair. Slowly lift your feet about 2 to 4 inches off the floor and hold for a few seconds. Release and continue to repeat this exercise for a minute.Another exercise to alternate with jumping jacks is the squat with twist. This will tone the sides of your abdominal muscles. Start in a standing position, feet about shoulder width apart. Lower into a squat position with both arms extended to shoulder height. At the bottom of the squat, rotate the upper body to the right. Return to standing. Repeat the exercise eight to 12 times on each side of your body.