For the last couple of months, everytime I go to Amazon I get adverts for those bloomin' PowerBalls. So I gave up and got one (arrived yesterday). I've watched a few saddo-videos on YouTube (not the best selling medium for this type of thing) and read a bit about what they are supposed to promise. According to the "blurb" they're great for hand/grip/forearm/upper arm rehabillitation. And they are good for those sports that need good forearm strength (citing things like golf and tennis), they also supposed to be good for musicians (building forearm/finger strength).
So anyway mine arrived yesterday and Ive had a couple of goes yesterday and one just now. I have to say it's clearly a skill (amongst other things) as my left hand/arm co-ordination has been shown to be incredably poor!
When you do get it working, it really does pack a punch. Something to do with physics and centrapetal/pedal forces but get the thing spinning at a reasonable velocity (I am yet to hit any dizzy heights) and you can really feel your lower arm working.
I read a long time back that those little hand-grip-squeezie things are good for building/strengthening your lower arms. And on one swimming site they recommended this as just another handy exercise to do, the rational being that you use your hand/wrist/forearm as your main anchor point whilst swimming, so perhaps strengthening it wouldn't be such a bad idea.
Anyhow we'll see how it goes...
