Affiliations: Department of Physical Therapy, Graduate School, Catholic University of Pusan, Geumjung-gu, Busan, Korea
Correspondence:
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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:[email protected]
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.
