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.
And we call that a grade-two or partial tear of that strain. Those can take anywhere from three to six weeks to heal and to recover from and most often require that the athlete stop the sport that they are participating in, whether it's running or basketball or working out.ou no longer can use that muscle. If you examine that muscle or that injury, you'll actually feel a gap where the muscle has torn away from the tendon initially, above or below the joint. Soon, thereafter, it will fill with blood.