Japanese

Title	ジュニア競泳選手の筋柔軟性および関節弛緩性の年代差および性差
Subtitle	原著
Authors	鈴木雄太*1, 奥田鉄人*2, 三瀬貴生*3, 國分裕一*4, 栗木明裕*5, 高山弘幹*6, 前田慶明*7, 浦辺幸夫*7
Authors (kana)
Organization	*1九州栄養福祉大学リハビリテーション学部理学療法学科, *2金沢星稜大学人間科学部スポーツ学科, *3新潟医療福祉大学健康科学部健康スポーツ学科, *4医療福祉専門学校緑生館理学療法学科, *5筑紫女学園大学現代社会学部現代社会学科, *6阪奈中央リハビリテーション専門学校理学療法学科, *7広島大学大学院医系科学研究科
Journal	日本臨床スポーツ医学会誌
Volume	31
Number	1
Page	122-130
Year/Month	2023 /
Article	原著
Publisher	日本臨床スポーツ医学会
Abstract	〔要旨〕本研究の目的は, 地方ジュニア競泳選手の全身の筋柔軟性や関節弛緩性の年代差および性差を確認することである. 6府県のスイミングクラブの選手コースまたは中学・高校の水泳部に所属する小学5年生から高校3年生までの競泳選手452名(男性256名, 女性196名)を対象とし, 上肢5項目, 下肢7項目の筋柔軟性および関節弛緩性を測定した. 年代(小5-6年, 中1-2年, 中3-高1年, 高2-3年)および性別(男性, 女性)の比較に二元配置分散分析を行った. 年代の主効果が得られた項目では, 事後検定としてTukey-Kramer法による多重比較を実施した. 全ての測定項目で有意な交互作用が認められたものはなかった(p>0.05). 年代の主効果が得られた項目のうち, 筋柔軟性を優位に反映すると考えられるHBD, 膝関節伸展位での足関節背屈角度は高学年で柔軟性の低下を示し(p<0.05), 関節弛緩性を優位に反映すると考えられる膝関節伸展角度は高学年で関節弛緩性の増大を認めた(p<0.05). 筋柔軟性および関節弛緩性の双方を反映すると考えられる肩関節内旋角度, 股関節内旋角度は高学年で可動性の低下を示し(p<0.05), TFDは可動性の増大を認めた(p<0.05). また, 肩回旋幅, 中指間距離, 第2肢位での肩関節内旋・外旋角度, 肘関節伸展角度, 股関節内旋角度, SLR, HBD, TFDでは性差が認められた(p<0.05).
Practice	臨床医学：外科系
Keywords	swimming, muscle flexibility, joint laxity, 競泳, 筋柔軟性, 関節弛緩性

English

Title	Age- and sex-specific differences in muscle flexibility and joint laxity in junior competitive swimmers
Subtitle
Authors	Suzuki, Y.*1, Okuda, T.*2, Mise, T.*3, Kokubu, H.*4, Kuriki, A.*5, Takayama, H.*6, Maeda, N.*7, Urabe, Y.*7
Authors (kana)
Organization	*1Department of Physical Therapy, Faculty of Rehabilitation, Kyusyu Nutrition Welfare University, *2Department of Sport Science, Faculty of Human Sciences, Kanazawa Seiryo University, *3Department of Health and Sports, Faculty of Health Sciences, Niigata University of Health and Welfare, *4Department of Physical Therapy, Technical School of Medical and Welfare Ryokuseikan, *5Department of Contemporary Social Studies, Faculty of Contemporary Social Studies, Chikushi Jogakuen University, *6Department of Physical Therapy, Hanna Central College of Rehabilitation, *7Graduate School of Biomedical and Health Sciences, Hiroshima University
Journal	Japanese Journal of Clinical Sports Medicine
Volume	31
Number	1
Page	122-130
Year/Month	2023 /
Article	Original article
Publisher	Japanese Society of Clinical Sports Medicine
Abstract	[Abstract] This study assessed age- and sex-specific differences in muscle flexibility and joint laxity in junior competitive swimmers. Of the 452 recruited swimmers aged 10-18 years, 256 were male and 196 were female. Muscle flexibility and joint laxity of the upper and lower extremities were measured using five and seven tests, respectively. Two-way analysis of variance (age group and sex) was performed. When interaction effects or the main effect by age group was detected, post hoc comparisons were used to test differences between variables by the Tukey-Kramer method. The results showed no significant interaction effects between the tests. Heel Buttock Distance (HBD), predominantly reflecting muscle flexibility, and ankle dorsiflexion angle during knee extension indicated decreased flexibility in older swimmers (p<0.05). Knee extension angle reflecting joint laxity, indicated increased laxity in older swimmers (p<0.05). Shoulder and hip joint internal rotation angles reflecting muscle flexibility and joint laxity, were decreased in older swimmers (p<0.05), while toe floor distance (TFD) showed increased mobility (p<0.05). Sex differences were observed in shoulder rotation width, distance between middle fingers, shoulder joint internal and external rotation angles, elbow joint extension angle, hip joint internal rotation angle, straight leg raising angle, HBD, and TFD (p<0.05).
Practice	Clinical surgery
Keywords	swimming, muscle flexibility, joint laxity

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