Table 1. Muscles investigated using electromyography and their actions. Muscle Gastrocnemius Biceps Femoris Rectus Femoris Upper Trapezius Anterior Deltoid Biceps Brachii Flexor Carpi Radialis Triceps BrachiiCode Muscle action in punch delivery.G Plantar flexion of foot and knee flexion.BF Hip extension and knee flexion.RF Hip flexion and knee extension.T Elevation of the scapulaAD Arm flexion and horizontal adduction.BB Elbow flexion and supination of the forearm. FCR Wrist flexion and wrist abduction.TB Elbow extension.