الفهرس 
Effect of pulsed shortwave diathermy on peak torque of quadriceps muscle in normal subjects
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Abstract
Temperature is an important determinant of skeletal muscle function, the effect of a change in muscle temperature on the efficiency of muscle contraction in vivo has received little attention. Purpose: The first purpose of this study was to investigate the effect of using pulsed shortwave diathermy on isometric and isokinetic peak torque of quadriceps muscle in normal subject. The second purpose of this study was to investigate the effect of using pulsed shortwave diathermy prior to isometric and isokinetic exercises on isometric and isokinetic peak torque of quadriceps muscle in normal subjects. Methods: Ninety normal male and female subjects with age ranged from 20-35 years and body mass index ranged from 22-26.5 kg/cm2 participated in this study. Subjects were randomly assigned into six equal groups. The first group received pulsed shortwave diathermy for the quadriceps; the second group received isometric training of quadriceps while the third group received pulsed shortwave diathermy followed immediately by isometric training of the quadriceps muscle. For each one of these groups the isometric peak torque of quadriceps at 60{u00B0} of knee flexion before and after each procedure was done. The fourth group received pulsed shortwave diathermy for the quadriceps; the fifth group received isokinetic exercise training of quadriceps in the form of concentric-eccentric training at 60{u00B0}/sec while the sixth group received pulsed shortwave diathermy followed immediately by isokinetic training in the form of concentric-eccentric training of quadriceps muscle. For each one of this groups the isokinetic (concentric-eccentric) peak torque of quadriceps at 60{u00B0}/sec before and after each procedure was done. The Biodex system 3 isokinetic dynamometer was used for assessment and training procedures