Alternative to mouse for gaming?

[CK011885]

Hi all, I've been playing a lot of Path of Exile since it came out last week...so much so that I'm getting hand cramps and probably have a repetitive stress injury now. I'm forcing myself to take breaks more often, but the game is too good and that's proving to be a problem. I'm wondering if there are any alternatives to gaming input devices, that might work well specifically for action RPG's (Diablo-like games). I dislike trackballs, but I'm open to other suggestions.

Edit: In case anyone was wondering what mouse I'm currently using, it's a Logitech G500.

 

[95Viper]

Peregrine gaming glove

ION Wireless Air Mouse

PC Magazine reviews:
ION Wireless Air Mouse
Peregrine Glove

 

[Nordic]

I owned the OCZ neural impulse actuator.

It did work with some practice. I would not recommend for serious gaming.

Maybe the pen mouse?

http://www.techpowerup.com/179502/Genius-Redesigns-the-Pen-Mouse.html

I highly doubt it would be much good for gaming, but hey, its an option.