Study on ralationship between muscle strain and arm positions

ABSTRACT

Study was conducted in laboratory condition for investagating the relationship between muscle strain and arm positions. Rerults showed that the bio-potential of brachioradialis, deltoid and trapezius muscles were significant higher when the arms were elevated at haft-arm length. The trapezius had highest bio-potential than the other left. The subjective shoulder pain occurred after 15-17 mimutes of experiment. When was higher hio-potential, that the muscle pain was more obvious. The accumulation of pain can be considered as reason of that called Neck-Shoulder Disorders.