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Journal of the Korean Academy of Rehabilitation Medicine 1996;20(3):31.
Isokinetic Values and Cardiovascular Responses of Hip Abductors andAdductors According to Different Positions of Exercise
Tae-Sik Yoon, M.D. , Myung-Shin Kim, M.D.
Department of Rehabilitation Medicine, Ewha Womens University College of Medicine
고관절 내전근 및 외전근의 자세에 따른 등속성 우력, 심박수 및 혈압의 비교
윤태식, 김명신
이화여자대학교 의과대학 재활의학과
Abstract

The purpose of this study was to investigate isokinetic values and cardiovascular responses of hip abductors and adductors in 34 normal untrained subjects(age 26,7±3.1; female 17, male 17) at rest and during separate session of upright and side-lying isokinetic exercises at angular velocity of 30°/sec using isokinetic dynamometer, Cybex 6000.

The results were as follows;

1) The peak isokinetic torque ratio of hip adductors to abductors in upright exercise was 122.8±14.2%, and 85.3±12.6% in side-lying exercise which showed a significant difference in torque values according to positions(p<0.01).

2) Angle of peak torque occurred in upright and side-lying exercises for hip adductors were 29.0±5.3° and 27.9±6.5° respectively , and for hip abductors -0.2±3.1° and -1.7±3.6° respectively which did not show any significant difference between upright and side-lying positions of isokinetic exercise.

3) Heart rate and diastolic blood pressure measured at rest showed a difference between upright and side-lying positions at rest(p<0.01).

However, systolic pressure at rest did not show any significant difference between upright and side-lying positions of isokinetic exercise(p<0.01).

4) In the upright exercise, the increment ratio of heart rate, systolic, and diastolic blood pressures obtained were found to be higher than in the side-lying exercise(p<0.01).

These findings indicate that upright isokinetic exercise of hip abductors and adductors produces a higher afterload than the side-lying maneuver and different positions of exercise may affect isokinetic peak torque values as well.

Therefore, these variables must be considered when prescribing a isokinetic exercise of hip abductor and adductor muscles.

Key Words: Isokinetic values, Hip abductors and adductors, Heart rate, Blood pressure, Supine and side-lying positions
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