According to a Pilates pro, the proper form for crunches doesn't involve crunching up with your hands behind your head because it can lead to neck pain. If someone tells you to drop down and knock out ...

Once, I was featured in a TV news story where there was video of me running. When I saw the video, I was dismayed. Proper running form? Notsomuch. The video revealed that I was a heel striker — which ...