2002•Annals of Rehabilitation MedicineOpen access

Effect of Forearm Position on the Supination and Pronation Strengths and EMG Activities of Related Muscles

Min Kyun Sohn, Byung-Hee Ahn, Yong‐Soon Yoon

Abstract

Objective: This study was designed to investigate the effect of forearm position on the maximal isometric voluntary supination and pronation strengths and EMG activities in the related muscles. Method: The maximal isometric supination and pronation strengths were measured in 14 normal male subjects using Work simulator at 4 different forearm rotation position. EMG activities were simultaneously measured in supinator and biceps brachii during supination and pronator quadratus and pronator teres during pronation. Results: The maximal isometric supination strength and EMG activities of biceps brachii and supinator were significantly higher as the forearm was more pronated (p

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Key concepts: Isometric exercise, Biceps, Forearm, Medicine, Physical medicine and rehabilitation, Electromyography, Anatomy, Elbow flexion