Exercise can be an antidote for a variety  of ills, but you need to know how to invest your sweat, For example, a new Univeristy of Alberta study found that strenght training is better than cardio work at releaving lower-back pain.

People who hit the weights for four months experienced a 63% reduction in pain, while those who did only aerobic exercise felt no improvement. The difference may be due to the total body benifits of lifting. “By adding mascular strenght to your whole body, you reduce the fatigue that builds up during the day,” explains study author Rob Kell,  Phd, “and you’re better able to maintain good posture, which maximizes stress on your lowerback.”