Influence of ROM Exercise on the Joint Components during
Immobilization |
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| Authors: | Taro Matsuzaki Shinya Yoshida Satoshi Kojima Masanori Watanabe Masahiro Hoso |
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| Institution: | 1) Division of Health Science, Kanazawa University Graduate School of Medical Science, Japan;2) Kanazawa University Hospital, Japan;3) Department of Medical Health Science, Kinjo University, Japan;4) Department of Rehabilitation Science, Nagoya Gakuin University, Japan |
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| Abstract: | Purpose] The aim of this study was to clarify the effects of the ROM exercise on joint
components according to histopathological analysis. Subjects and Methods] In total,
twenty-six 9-week-old adult male Wistar rats were used in this study. The rats were
randomly divided into three groups, the immobilization group (n=10), exercise group
(n=10), and control group (n=6). The immobilization group and exercise group were
anaesthetized and operated on under sterile conditions. The right knee joints in the
immobilization group and exercise group were immobilized with external fixation at 120
degrees of flexion. Range of motion exercise was started from the day after
immobilization. ROM exercise was performed in the exercise group once a day for 3 minutes,
6 days a week, for 2 weeks. Result] The joint capsule in the immobilization group and
exercise group showed narrowing of the collagen bundles in interstitial spaces but was
less dense in the control group. In the immobilized group, a hyperplastic reaction was
associated with infiltration into the articular cavity and adhesion to the surface of the
articular cartilage. Conversely, in the exercise group, hyperplasia of tissue was
localized to the synovial membrane. Conclusion] This finding may suggest that ROM
exercise induces some changes within the joint components and tissue metabolism.Key words: Joint immobilization, Contracture, ROM exercise |
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