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Article type: Research Article
Authors: Lee, Dong-Rour | Jong-Soon Kim, Laurentius*
Affiliations: Department of Physical Therapy, Graduate School, Catholic University of Pusan, Geumjung-gu, Busan, Korea
Correspondence: [*] Corresponding author: Laurentius Jong-Soon Kim, Department of Physical Therapy, Graduate School, Catholic University of Pusan, 9, Bugok 3-dong, Geumjung-gu, Busan 609-757, Korea. Tel.: +82 51 510 0573; Fax: +82 51 510 0578; E-mail:ptjskim@cup.ac.kr
Abstract: BACKGROUND AND OBJECTIVES: The goal of this study is to analyze the effects of hand grip training on shoulder joint internal rotation (IR)/external rotation (ER) peak torque for healthy people. METHODS: The research was conducted on 23 healthy adults in their 20 s-30 s who volunteered to participate in the experiment. Hand grip power test was performed on both hands of the research subjects before/after the test to study changes in hand grip power. Isokinetic machine was used to measure the concentric IRPT (internal rotation peak torque) and concentric ERPT (external rotation peak torque) at the velocity of 60°/sec, 90°/sec, and 180°/sec before/after the test. Hand grip training was performed daily on the subject's right hand only for four weeks according to exercise program. Finally, hand grip power of both hands and the maximum torque values of shoulder joint IR/ER were measured before/after the test and analyzed. RESULTS: There was a statistically significant difference in the hand grip power of the right hand, which was subject to hand grip training, after the experiment. Also, statistically significant difference for shoulder ERPT was found at 60°/sec. CONCLUSION: Hand grip training has a positive effect on shoulder joint IRPT/ERPT and therefore can help strengthen muscles around the shoulder without using weight on the shoulder. Consequently, hand grip training would help maintain strengthen the muscles around the shoulder in the early phase of rehabilitation process after shoulder surgery.
Keywords: Hand grip training, grip power, shoulder joint internal rotation peak torque, shoulder joint external rotation peak torque
DOI: 10.3233/BMR-150652
Journal: Journal of Back and Musculoskeletal Rehabilitation, vol. 29, no. 3, pp. 521-525, 2016
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