Medicarn Push up Twister. Strengthens and tones chest, arms, back, abdominals and shoulder muscles. Whether you are 8 or 80 you can use the PushUp Twister with guaranteed results that you'll see and feel an amazing difference in your body within 10 days. Medicarn fitness only chose the highest quality materails to produce fitness equipment. Any medicarn fitness product should be putchsed by Amazons only distributor internetukshop. If you receive anything other than the medicarn branded product please report the seller to amazon.