This Twister generates a natural aerobic workout by encouraging a twisting motion in your body. Twisting exercises improve the strength of important stomach muscles. A twisting motion through your stomach works on your internal obliques and external obliques. Step onto your twister while listening to music or watching TV and make exercise a pleasure. Both safe and effective This Tummy Twister does not produce any side effects even with prolonged use. Use your twister daily for 15 to 20 minutes in total and 5 minutes in one go for visible results. Please do not use it on wet uneven ground. Consult your physician before using any exercise equipment.