Benefits from using a Powerball?

[Pilkie]

Hello everyone - 'long time reader, first time poster'. Anyway, has anyone ever used a Powerball to improve their badminton? Did you see any noticeable changes or effects from using it? I've recently started using one, and I believe it's helping me, giving me more power from less backswing / more strength in the 'flick'. However this might be coincidence as I've been practicing my technique recently as well. Theoretically, it should strengthen the wrist and forearm giving more power in the flick, making it possible to smash and clear more easily. It might also help with a backhand. Does anyone have any decent 'techniques' to train with it? I've been using some of the ones from here: http://www.actionball.co.nz/exercise.html But I don't have a proper routine, so if anyone has one that they'd like to share it'd be appreciated. For those who don't know, this is a Powerball: http://www.powerballs.com/

[Pilkie]

I'd also like to reassure everyone that I did put formatting in the original text - paragraphs etc, but apparently they were deleted.. Also I can't seem to see an edit button anywhere..

[scuttler]

I love my powerball, it definatly helps strengthen the wrist but dont expect any quick noticable improvments. Movment is similar to badminton shots so there is hope. Perhaps a good routin would help.

[Andy05]

I use a powerball only when I have Tennis elbow and it helps restrengthen it and lowers my recovery time. I only use it lightly to recover on my right arm, and hard on my left to try and build it up.
Just my personal opinion, others may find it doesn't help too much.

[sarath_031]

Does it help in building the slow muscles or fast-twitch muscles?