The standing twist is an exercise you don’t often see in today’s classes, says Brooke Siler, Pilates expert and author of Women’s Health Big Book of Pilates. But the move is one of the best Pilates exercises you can do. It helps release and rotate the spine while challenging your core, back, and inner thigh muscles.  You’ll also notice your balance being challenged, which helps boost core strength and just doing one rep on each side is an amazing way to unwind at the end of a stressful day.  Watch as Siler demonstrates how to properly perform this exercise, and find more toning Pilates moves at Prevention.com.