Im a trampoliner for enjoyment, and i usually use it at least 45 to an hour each day. I have been doing it for about 8 years now but im still slighty over weight. I dont understand why and i can never notice any difference in my body shape. Is there anything i can do to make a difference to make it work. p.s. the type of jumping I do is tricks and they are quite hard, so why dont they work?