1 Collagen is most commonly found within the body in the skin, bones and connective tissues. 2  The word collagen is derived from the Greek kolla, meaning glue. 3  Collagen gives the skin its strength and structure, and also plays a role in the replacement of dead skin cells. Collagen is most commonly found within the body in the skin, bones and connective tissues. 2  The word collagen is derived from the Greek kolla, meaning glue. 3  Collagen gives the skin its strength and structure, and also plays a role in the replacement of dead skin cells.
Healing time depends on the severity of the strain. Mild muscle strains usually heal within two weeks. Moderate muscle strains may take six to eight weeks to heal. Prevention of Recurring Back Strain. Many people who experience recurring back pain have weak core muscles - the muscles that support the back.
Treatment. Pulled muscles mostly heal independently without particular medical treatment. The pain may begin to dissipate within two or three weeks, yet the injury can be two months before it is thoroughly recovered. Within the first 48 hours of pulling your back muscle, apply ice to the injured area. It should be applied every four hours for 15 to 20 minutes each time. This helps decrease the pain and inflammation, which can contribute to the pain too.