Our Handstand Trainer has been designed to have "flex" within the steel unit itself. Then the unit is "strung" with special bungie (you cannot buy this in any hardware store). The combined effect is almost a miracle. The system works in harmony to produce a soft bounce which will not "bottom out". This bounce is at the correct speeds for the little ones through the cheerleaders and even the men's program. No bottoming out problems which destroy timing and rhythm. It will fit in even the smallest gyms. it can be stored easily against the wall taking up only inches of valuable floor space in seconds by revolving the legs to lie flat against the frame!