that's funny. our gym also recently upgraded to similar treadmills (the new Life Fitness models with LCD touch screens) and I had the same thing happen. it's most likely static build-up from the spinning rubber belt and every so often when your head phone cord hits the metal frame...zapp.....i found it to be more of an annoying zapp than a nasty shock.


run your headphone cord through your shirt or holding it so that it doesn't touch the metal should prevent this.

actually I'm surprised the machines don't have better grounding.


cheers,jim