Foam rolling is in many ways like a deep massage—but you give it to yourself. By rolling the hard foam over your thighs, calves, and back, you’ll loosen tough connective tissue (like the fascia, which stretches over many of your muscles and can tighten up) and decrease the stiffness of your muscles. The result? Better flexibility and mobility, and muscles that can function properly. I recommend foam rolling before any workout, but in reality, you can do it anytime. The easiest time is to pull out the foam roller while you’re watching TV.
Via PAT NOVAK