Sit-Ups are Stupid, Crunches are Crap, What Works?
The Flipping 50 Show - Un pódcast de Debra Atkinson
80 percent of US adults experiences back pain. Eighty percent of those individuals have recurring pain throughout the year. Are you one of them? What can you do to prevent back pain? Sit-ups and crunches are not a girl’s (or guy’s best friend). So, what does work?
