LAUSR

Abstract Introduction The main objective of the present study is to compute muscle strength in terms of muscle force and fatigue for biceps brachii, using trained and untrained subjects in static contraction (isometric contraction). Methods There are two groups of 14 subjects each as trained subjects and untrained subjects. An isometric contraction is performed by two groups at three submaximal contraction levels L1 (50% MVC), L2 (75% MVC) and L3 (100% MVC) for 60 s each or until task failure, whichever comes first. The study compared the strength of the two groups based on maximal isometric muscle force and state of muscle fatigue using the slope of median frequency (MDF). Results It was found that there was an 18.39% increase in the biceps brachii muscle strength for trained subjects as compared with untrained (P  Clinical implementation The proposed method is clinically validated on total knee replaced patients with their consent. Conclusions The method is used to monitor the muscle strength and for prognosis of muscle fatigue in isometric contraction.