Jennifer Rigby, Blackpool

I'll admit this tune is not the height of cool. But if its throbbing disco beats don't get your muscles pumping along with it, the video will. It shows legions of gym bunnies, clad head-to-toe in Lycra, doing undignified things at the behest of a harridan-like instructor. It will either inspire, shame or disgust you into action. Especially good for the treadmill. Email your treadmill track to fitness@theguardian.com