Deltoid contracture is a disorder which may result from repeated intramuscular injections. The clinical manifestations consist of restriction of shoulder adduction, shoulder pain, and wing scapula. Surgical intervention is a most utilized way to resolve the problem of limited range of motions, which includes proximal transverse incision, proximal longitudunal incision, and distal release technique developed by Dr. Chen, one of the authors. Objective isokinetic muscle testing proved the distal release of deltoid contracture did not affect the shoulder muscle strength.