The intercostal muscles consists of several groups of muscles ((internal and external intercostals and subcostal and transverse thoracic muscles) which are located between the ribs and function to move and stabilize the chest wall.
These muscles can become strained often as a result of rapid twisting of the torso and are common in sports such as basket ball and tennis, water-skiing etc.
Muscle strains have three gradings:
Grade I Strain: This is a mild strain and only some muscle fibers have been damaged. Healing occurs within two to three weeks.
Grade II Strain: This is a moderate strain with more extensive damage to muscle fibers, but the muscle is not completely ruptured. Healing occurs within three to six weeks.
Grade III Strain: This is a severe injury with a complete rupture of a muscle. This typically requires a surgical repair of the muscle; the healing period can be up to three months.
Symptoms commonly reported are either a sharp, stabbing pains when breathing to a ever-present, painful ache or soreness located around the ribcage. The pain is aggravated by deep breathing, side bending and twisting.
The degree of disability along with the rate of recovery will depend on the grade of the muscle strain. Given above is a general guideline as to the rate of recovery from a muscle strain per se however, the healing time may be longer due to our constant need to breathe and therefore low grade irritation to the healing site