How can i heal a pulled muscle in my lower back without rest / heat?

Modify activity: Muscle strain or "pulls" occur when the muscle fibers are stretched and tear. These will eventually heal with time and the less trauma you can do to these muscles, the more likely they will heal. In the acute setting, ice and rest is beneficial and as the pain subsides you can use heat. There is no secret recipe other than time and protecting your back from additional stress.