Vitally important! Foam rolling is an essential part of training. It ranks right up there with core work. It may not be as sexy as a glute workout, but your glutes and every other part of your body will thank you later. Muscles can become bruised and tight, the foam roller massages these muscles. This is part of your active recovery. Rolling out can be pretty intense, so take your time, listen to your body and go at your own pace.