If you're a runner, then a foam roller should be your new best friend. The repetitive stress of running can cause tight muscles. Left untreated, tight, overactive muscles can cause muscle imbalances, poor posture, improper movement and ultimately injury. 

Foam rolling, known as self-myofascial release, is a technique that uses gentle pressure to break up the knots within the muscle and helps release muscular tension or tightness. Foam rolling is a form of self massage.

Why do runners need to foam roll?