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.
How long does it take for a muscle strain to heal? It can take anywhere from 1 week to six weeks for a grade I (mild) or grade II (more severe, only partial muscle/tendon tear) muscle strain to heal completely.A grade III strain (one that causes a complete tearing of the muscle or tendon) can take months to heal. personally don't think its too severe, but it's been going down for about a week and I'm getting annoyed. im 18. Depends entirely on your age, your physical condition, the severity of the strain, etc. I'd guess as little as 24 hours and as long as another week.