I just wanted to jump in here and let you know about rebounders. It is the best exercise there is. Way better than a tread mill. You can walk, run or jog on it too. Rebounding cleans lymph system. Check out the link below. NEEDAK is the best rebounder there is.Their web site provides tons of information on the benefits of rebounding. I cannot afford that one so I got a cheap one from Walmart for about $20. Between using my cheap rebounder, liver flushing, bowel cleaning and changing my diet I have lost over fifty pounds. I still have more to lose, but it is a good start. When I first got the rebounder I was in such bad shape that I actually had to start off doing ten bounces and work my way up ! *LOL*