@Cecile, no, no, no no… I have a rebounder. All it is is a small trampoline-like thing. It is sprung tighter than a trampoline. You jump on it, or walk on it. 10 minutes on it is as much cardio-vascular exercise as a 30 minute jog, without the knee problems and with the added bonus in that it really does help with lymph drainage.
the other thing is, they can help with elderly people and healing – if you can’t even walk and have circulation problems all you have to do is put your feet on it and get someone else to jump on it – the vibration helps boost blood supply. It has even helped 90 year olds regain the ability to walk and balance.
i have never done this nude, and wouldn’t recommend it, in fact one of my friends who has one wears 2 bras to try and negate the, er, rebounding action in her upper areas!