Fix Your Form: How To Do The Perfect Shoulder Press

If you don't know your way around a weight room, heading to the gym can be intimidating -- and even dangerous. But paying attention to a few simple rules of proper technique can make you slimmer, stronger and healthier all over. We spent an afternoon at Equinox with trainer and manager Rebecca Woll, learning the ins and outs of some of the most popular strength-training machines. We've been sharing Woll's thoughts on the biggest mistakes we all make while building muscle, plus her tips and trick...