Reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball players
Background: The aim of this study was to evaluate the efficacy of reciprocal inhibition for posterior shoulder tightness (PST), internal rotation at 90° abduction (ABIR) limitation, and subacromial impingement in elementary and junior high school baseball players. Methods: The present study included...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | JSES International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666638321001857 |
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| author | Tsuyoshi Ichinose, MD, PhD Hitoshi Shitara, MD, PhD Tsuyoshi Tajika, MD, PhD Takuro Kuboi, MD Daisuke Shimoyama, MD Tsuyoshi Sasaki, MD, PhD Noritaka Hamano, MD, PhD Masataka Kamiyama, MD Atsushi Yamamoto, MD, PhD Tsutomu Kobayashi, MD, PhD Kenji Takagishi, MD, PhD Hirotaka Chikuda, MD, PhD |
| author_facet | Tsuyoshi Ichinose, MD, PhD Hitoshi Shitara, MD, PhD Tsuyoshi Tajika, MD, PhD Takuro Kuboi, MD Daisuke Shimoyama, MD Tsuyoshi Sasaki, MD, PhD Noritaka Hamano, MD, PhD Masataka Kamiyama, MD Atsushi Yamamoto, MD, PhD Tsutomu Kobayashi, MD, PhD Kenji Takagishi, MD, PhD Hirotaka Chikuda, MD, PhD |
| author_sort | Tsuyoshi Ichinose, MD, PhD |
| collection | DOAJ |
| description | Background: The aim of this study was to evaluate the efficacy of reciprocal inhibition for posterior shoulder tightness (PST), internal rotation at 90° abduction (ABIR) limitation, and subacromial impingement in elementary and junior high school baseball players. Methods: The present study included 290 elementary school and junior high school baseball players who were members of an organized baseball team and attended a medical checkup in 2014. Seventeen participants were excluded because they were left-handed. We applied a sit-up exercise as a tool of reciprocal inhibition to all participants. Before and after the sit-up exercise, we evaluated the shoulder range of motion (ROM) in external rotation at 90° abduction (ABER), ABIR, and horizontal flexion (HF) in both shoulders and the prevalence of subacromial impingement in the dominant shoulder. We defined PST as a ≧15°decrease in the HF angle of the dominant shoulder in comparison to the nondominant shoulder before the sit-up exercise and divided participants into two groups (the PST group and the non-PST groups). An independent t-test was performed to compare the shoulder ROM, and a chi-squared test was performed to compare the prevalence of subacromial impingement between the two groups. A dependent t-test was performed to compare intragroup changes in the shoulder ROM. The McNemar test was performed to compare intragroup changes in the prevalence of subacromial impingement. Results: Fifty-six of 273 participants had PST in the initial examination. The initial examination revealed that the ROM of ABIR and HF in the dominant shoulder were significantly lower in the PST group than those in the non-PST group, whereas the ROM of ABER and total arc were significantly higher in the PST group. The prevalence of subacromial impingement in the PST group was significantly higher than that in the non-PST group. The sit-up exercise improved ABER, ABIR, total arc, HF, and the prevalence of subacromial impingement in both groups. However, the amount of ROM change did not differ between the two groups for any parameter with the exception of HF. Conclusion: The presence of PST affects the prevalence of subacromial impingement but was not related to the loss of ABIR or the prevalence of pathological glenohumeral internal rotation deficit. The sit-up exercise, as reciprocal inhibition, can transiently improve the prevalence of subacromial impingement via the improvement of PST. |
| first_indexed | 2024-12-18T02:05:30Z |
| format | Article |
| id | doaj.art-36781bc763da497cbde190ffdb41ab51 |
| institution | Directory Open Access Journal |
| issn | 2666-6383 |
| language | English |
| last_indexed | 2024-12-18T02:05:30Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | JSES International |
| spelling | doaj.art-36781bc763da497cbde190ffdb41ab512022-12-21T21:24:36ZengElsevierJSES International2666-63832021-11-0156978982Reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball playersTsuyoshi Ichinose, MD, PhD0Hitoshi Shitara, MD, PhD1Tsuyoshi Tajika, MD, PhD2Takuro Kuboi, MD3Daisuke Shimoyama, MD4Tsuyoshi Sasaki, MD, PhD5Noritaka Hamano, MD, PhD6Masataka Kamiyama, MD7Atsushi Yamamoto, MD, PhD8Tsutomu Kobayashi, MD, PhD9Kenji Takagishi, MD, PhD10Hirotaka Chikuda, MD, PhD11Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan; Corresponding author: Hitoshi Shitara, MD, PhD, 3-39-15 Showamachi, Maebashi, Gunma 371-8511, Japan.Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Physical Therapy, Takasaki University of Health and Welfare, Takasaki, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, JapanBackground: The aim of this study was to evaluate the efficacy of reciprocal inhibition for posterior shoulder tightness (PST), internal rotation at 90° abduction (ABIR) limitation, and subacromial impingement in elementary and junior high school baseball players. Methods: The present study included 290 elementary school and junior high school baseball players who were members of an organized baseball team and attended a medical checkup in 2014. Seventeen participants were excluded because they were left-handed. We applied a sit-up exercise as a tool of reciprocal inhibition to all participants. Before and after the sit-up exercise, we evaluated the shoulder range of motion (ROM) in external rotation at 90° abduction (ABER), ABIR, and horizontal flexion (HF) in both shoulders and the prevalence of subacromial impingement in the dominant shoulder. We defined PST as a ≧15°decrease in the HF angle of the dominant shoulder in comparison to the nondominant shoulder before the sit-up exercise and divided participants into two groups (the PST group and the non-PST groups). An independent t-test was performed to compare the shoulder ROM, and a chi-squared test was performed to compare the prevalence of subacromial impingement between the two groups. A dependent t-test was performed to compare intragroup changes in the shoulder ROM. The McNemar test was performed to compare intragroup changes in the prevalence of subacromial impingement. Results: Fifty-six of 273 participants had PST in the initial examination. The initial examination revealed that the ROM of ABIR and HF in the dominant shoulder were significantly lower in the PST group than those in the non-PST group, whereas the ROM of ABER and total arc were significantly higher in the PST group. The prevalence of subacromial impingement in the PST group was significantly higher than that in the non-PST group. The sit-up exercise improved ABER, ABIR, total arc, HF, and the prevalence of subacromial impingement in both groups. However, the amount of ROM change did not differ between the two groups for any parameter with the exception of HF. Conclusion: The presence of PST affects the prevalence of subacromial impingement but was not related to the loss of ABIR or the prevalence of pathological glenohumeral internal rotation deficit. The sit-up exercise, as reciprocal inhibition, can transiently improve the prevalence of subacromial impingement via the improvement of PST.http://www.sciencedirect.com/science/article/pii/S2666638321001857Reciprocal inhibitionposterior shoulder tightnessglenohumeral internal rotation deficit |
| spellingShingle | Tsuyoshi Ichinose, MD, PhD Hitoshi Shitara, MD, PhD Tsuyoshi Tajika, MD, PhD Takuro Kuboi, MD Daisuke Shimoyama, MD Tsuyoshi Sasaki, MD, PhD Noritaka Hamano, MD, PhD Masataka Kamiyama, MD Atsushi Yamamoto, MD, PhD Tsutomu Kobayashi, MD, PhD Kenji Takagishi, MD, PhD Hirotaka Chikuda, MD, PhD Reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball players JSES International Reciprocal inhibition posterior shoulder tightness glenohumeral internal rotation deficit |
| title | Reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball players |
| title_full | Reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball players |
| title_fullStr | Reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball players |
| title_full_unstemmed | Reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball players |
| title_short | Reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball players |
| title_sort | reciprocal inhibition improves posterior shoulder tightness and shoulder range of motion in youth baseball players |
| topic | Reciprocal inhibition posterior shoulder tightness glenohumeral internal rotation deficit |
| url | http://www.sciencedirect.com/science/article/pii/S2666638321001857 |
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