To see if you're bending correctly, try a simple experiment. "Stand up and put your hands on your waist," says Jean Couch, who has been helping people get out of back pain for 25 years at her studio ...

Static, on the other hand, involves held poses: leaning over an outstretched leg or bending toward the ground for 30 seconds or so. Until February, triathlete Brett Skyllingstad began his workouts ...