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Journal of the Korean Academy of Rehabilitation Medicine 1990;14(1):15.
The Variation of Isokinetic Strength in the Wrist Flexors and Extensors as the Change of Elbow Joint Angle
Sae Yoon Kang, M.D., Jin Hong Bae, M.D. , Hye Won Kim, M.D.
Department of Rehabilitation Medicine, Catholic University Medical College
건강한 한국 청년의 주관절 각도에 따른 완관절 굴근 및 신전근의 등속성 근력 평가
강세윤, 배진홍, 김혜원
가톨릭대학교 의학부 재활의학교실

Since isokinetic exercise equipment can give an evaluation of muscle strength with great accuracy and objectivity, it is more widely using as the one of the important methods in rehabilitation and sports medicine.

The aim of this paper is to determine the normative strength values for wrist flexor and extensor and to set up the accurate measuring criterion of the strength in case of manual muscle test of wrist comparing variation of strength as the change of elbow joint angle.

This test is carried out for the strength of wrist flexor and extensor on the condition that the subjects are 30 healthy men from 3rd to 4th decade at the speed of 60o/sec and the elbow were flexed at 90o and 45o and were extened at 0o.

The results were as follows:

1) The mean peak torque of elbow flexor were 9.12±2.08 ft-lbs at 90o of elbow angle, 7.17±1.67 ft-lbs at 45o, 5.02±2.78 ft-lbs at 0o.

2) The mean peak torque of elbow extensor were 4.52±1.76 ft-bls at 90o of elbow angle, 3.52±1.85 ft-lbs at 45o, 2.17±1.45 and 43.2% at 0o.

3) The ratio between the peak torque of two muscle group at 90o of elbow angle were 49.5% at 90o at 90o at elbow angle, 46.9% at 45o and 43.2% at 0o.

According to above data, the peak torque of two muscle group at 90o of elbow angle were significant higher than at 45o and 0o of elbow angle, therefore we concluded that the manual muscle test of wrist flexor and extensor had better be performed at 90o of elbow angle.

Key Words: Wrist muscle strength, Isokinetic test, Normative data


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