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- Title
The effect of rotator cuff physical exercise combined with electrically stimulated antagonist on shoulder rotator cuff strength.
- Authors
Hara, Koji; Matsuse, Hiroo; Hashida, Ryuki; Iwanaga, Sohei; Bekki, Masafumi; Hara, Masafumi; Aramaki, Kei; Tsutsumi, Koji; Tagawa, Yoshihiko; Shiba, Naoto
- Abstract
<bold>Background: </bold>An elastic band (EB) is generally used with a low load for rotator cuff physical exercise, but the resulting increase in muscle strength is insufficient. We assessed the efficacy on external rotator muscle strength of the shoulder joint; of a hybrid training system (HTS) that resists the motion of a volitionally contracting agonist muscle using the force generated by its electrically stimulated antagonist vs. general rotator cuff exercise with EB.<bold>Methods: </bold>Twenty healthy men with no shoulder joint disorders were randomized to 6 weeks of triweekly 10-min rotator cuff exercise with HTS or EB in a clinical research laboratory. Isokinetic concentric external rotator muscle strength at angular velocities of 60°/s and 180°/s (CON60, CON180, respectively) and isokinetic eccentric external rotator muscle strength at an angular velocity of 60°/s (ECC60) were measured as rotator cuff function before and after 6 weeks of intervention.<bold>Results: </bold>There were no significant intergroup differences in baseline characteristics. There were statistically significant differences (p = 0.0358, p = 0.0213, respectively) in the increase in CON180 (mean ± SD) and ECC60 between the HTS group (Δ6.0 ± 6.0Nm, p = 0.015; Δ7.5 ± 4.7Nm p = 0.0007, respectively) and the EB group (Δ0.3 ± 5.2Nm, p = 0.8589; Δ1.8 ± 5.3 Nm p = 0.3133, respectively). There was a trend toward CON60 increasing in the HTS group (Δ4.7 ± 6.5Nm, p = 0.0494) which was greater than in the control group (Δ-0.9 ± 6.3Nm, p = 0.6637) (inter-group, p = 0.0677).<bold>Conclusions: </bold>The results of this study support the conclusion that HTS is more effective for increasing external rotator muscle strength more effectively than EB. HTS would be useful for rotator cuff physical exercise.
- Subjects
ROTATOR cuff; SHOULDER joint; JOINT diseases; MUSCLE strength; ANGULAR velocity; RESEARCH; RANGE of motion of joints; RESEARCH methodology; EVALUATION research; COMPARATIVE studies; RANDOMIZED controlled trials; EXERCISE; SHOULDER
- Publication
Journal of Orthopaedic Science, 2022, Vol 27, Issue 1, p126
- ISSN
0949-2658
- Publication type
journal article
- DOI
10.1016/j.jos.2020.11.015