Personal trainers spend all day watching people work out, so they are well versed in the biggest mistakes we make when we're sweating it out at the gym. We asked trainers from Crunch, Equinox, and Sports Club/LA to tell us the worst things they see people doing over and over when exercising in the gym. Here are the 10 biggest mistakes people make at the gym — and how to avoid them!
More mistakes after the break!