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.
The swelling and inflammation can build up for days after a workout, and that's why muscle soreness may be worse two, three, or even four days after a workout (it can take up to five days for muscles to heal completely depending on the intensity of the workout).actic acid is a normal byproduct of muscle metabolism, but it can irritate muscles and cause discomfort and soreness. Muscle soreness associated with exercise is known as delayed onset muscle soreness or DOMS.