I jumped on my first rebounder in the 80's and broke two of the $39/49 cheapies from the sports store and gave it up for ten years. When deciding to get back to rebounding in Chicago because the winters were too cold for daily outdoor walking, I paid up to get the best at the time a Reboundair. And I loved it, jumping pretty regularly but maybe only 10 or 15 minutes per day. On my 68th birthday, I decided it was time to increase my time to keep from losing bone mass, balance, and lung power. A broken spring took me on an internet search and bellicon kept bouncing to the top of search results. I was hooked, and took possession of my 44" blue mat, lime green bungees in early winter. I bounce six minutes every hour for a total of 60 minutes per day. I look great, feel great and give thanks to bellicon for giving me so much enjoyment and healthful exercise.