There's nothing magical about this piece of equipment- its a big, sturdy rubber ball, and what you see in the picture is exactly what you get. So why would you even want to bother messing with it?
Well, despite its simplicity, its a really FUN piece of exercise equipment and an absolutely GREAT way to change things up. For instance, if you're tired of doing sit-ups on the floor, well, try them on the ball (you'll see what I mean when you do). If you're tired of doing push-ups on the floor, just try them with your feet on the ball- then see how many push-ups you can do!
But be careful and use your judgement. While there's a lot of stuff you can do with this big ball, you COULD also get hurt if you're clowning around or trying something you're simply not in shape to do yet.
All-in-all, though, its especially nice for a change of pace or for an added challenge. Additionally, many therapists use balls like these for rehabilitation purposes, particularly back rehab, so there's really a lot you can do with it. If nothing else, pull it out after a long day at the office and stretch your back out over it- wow- does that ever feel good! Those who suffer with back pain might also be interested in Treat Your Own Spinal Stenosis
. Have fun!