Korean J Sports Med.  2016 Jun;34(1):48-56. 10.5763/kjsm.2016.34.1.48.

Norm-Referenced Criteria for Isokinetic Strength of the Lower Limbs for the Korean High School Baseball Players

  • 1Sunsoochon Hospital, Seoul, Korea. trainerksh@hanmail.net
  • 2Department of Kinesiologic Medical Science, Dankook University, Seoul, Korea.


This study concerns norm-referenced criteria for isokinetic strength of the lower limbs for the Korean high school baseball players. Two hundred one high school baseball players were participated in this study. They didn't have any medical problem at the lower limbs. Each test was conducted four times in the ankle plantar flexion/dorsiflexion test at 30°/sec speed, knee flexion/ extension test was conducted four times at 60°/sec speed. Humac Norm (CSMI, USA) system was used to obtained the value of peak torque, peak torque % body weight. The results were presented as a norm-referenced criterion value using 5-point scale of cajori, by 5 group (6.06%, 24.17%, 38.30%, 24.17%, and 6.06%) and a few suggestions from this study as follows. The provided criterion of peak torque and peak torque % body weight are very useful information for baseball palyers, baseball coach, athletic trainers and sports injury rehabilitation experts, to utilize as an objective clinical assessment data.


Baseball; Isokinetic strength; Peak torque; Lower extremity
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