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| 題 名 | 自行車豎管長度和角度設定對自行車騎乘的影響=The Effect of Bicycle Stem Length and Angle Settings on Cycling Performance |
|---|---|
| 作 者 | 邱文信; 張妃婷; 楊承旺; | 書刊名 | 運動表現期刊 |
| 卷 期 | 12:S1 2025.06[民114.06] |
| 頁 次 | 頁211-226 |
| 專 輯 | 特刊:自行車運動表現 |
| 分類號 | 528.9012 |
| 關鍵詞 | 客製化; 把手; 軀幹長度比例; 關節角度; 肌肉活化; Bike fitting; Handlebar; Limb length ratio; Joint angle; Muscle activation; |
| 語 文 | 中文(Chinese) |
| DOI | 10.53106/2409965120250612S1006 |
| 中文摘要 | 目的:以人體軀幹長度依比例調整自行車豎管長度為依據,比對不同比例之豎管長度和角度下,上肢關節角度與肌肉活化差異,藉此供騎乘者作為上肢騎乘姿勢調整的參考依據。方法:招募12名成年男性,以豎管長度與軀幹長度之比例設定為5%、8%與11%三種比例,並搭配-5°、0°與5°三種角度,透過高速攝影機與表面肌電儀收取上肢運動學與肌肉活化參數,以重複量數二因子變異數分析,比較上肢慣用側肩、肘、髖關節角度與伸腕肌、屈腕肌、前三角肌與闊背肌活化程度之差異。結果:在關節角度上,肘關節無顯著作用;肩關節在豎管長度為11%時顯著大於8%、5%,且8%顯著大於5%;髖關節在豎管長度和角度中有交互作用,當豎管長度為5%與11%時相同,皆為0°和5°顯著大於-5°。在肌肉活化上,伸腕肌在豎管長度為11%顯著大於5%;豎管角度為-5°顯著大於0°和5°;而屈腕肌和前三角肌無顯著差異;闊背肌在豎管長度和角度中有交互作用,當豎管長度為11%時,豎管角度0°和5°顯著大於-5°,而5%與8%時則無顯著差異。結論:自行車豎管調整可提供固定車架下更符合客製化需求的自行車配置。豎管長度與角度顯著影響關節角度與肌肉活化,速度型騎乘者適合長且低角度豎管以減少風阻並降低非必要之肌肉活化,休閒騎乘者則宜採用短且高角度設置以提升舒適性並減少傷害風險。 |
| 英文摘要 | Purposes: Based on the ratio of upper limb length to bicycle stem length, compare the differences in upper limb joint angles and muscle activation between different ratios of stem length and angle to provide riders with a reference for adjusting upper limb riding posture. Methods: 12 males were recruited to investigate the upper limb kinematics and muscle activation difference between three ratios of stem length to upper limb length (5%, 8%, and 11%), and three stem angles (-5°, 0°, and 5°). Using High-speed cameras and surface electromyography to collect data during the riding test. Two-way repeated measures ANOVA was conducted (α = .05) to determine if there were significant differences in the parameters about the angles of the upper limbs on the customary side of the shoulders, elbows, and hips, and the differences in the extensor carpi radialis (ECR), flexor carpi ulnaris (FCU), deltoideus (DEL), and latissimus dorsi (LD). Results: In terms of the main effect of body joint angles, no significant differences in the elbow, but the shoulder joint has a significant effect on the stem length (11% > 8%, 5%; 8% > 5%). Additionally, an interaction effect was observed for the hip joint between stem length and angle. When the stem length was 5% or 11%, the joint angles at stem lengths of 0° and 5° were significantly greater than at -5°. In terms of muscle activation, the ECR had a significant difference in stem length (11% > 5%) and stem angle (-5° > 0°, 5°), whereas the FCU and DEL had no significant difference. In LD maximal voluntary contraction the stem length interacted with the stem angle. Post hoc analysis revealed that at a stem length of 11%, muscle activation at 0° and 5° was significantly greater than at -5°. Conclusions: Adjusting stem length and angle allows for a customized bike setup. Longer, lower-angle stems suit speed cyclists by reducing air resistance and muscle activation, while shorter, higher-angle stems enhance comfort and reduce injury risk for leisure riders. |
本系統中英文摘要資訊取自各篇刊載內容。