【摘要】：研究目的:研究不同肩帶結(jié)構(gòu)的運動文胸在跑步時對乳房支撐效果和肌肉活動的影響;結(jié)合壓強值和主觀問卷分析三款肩帶結(jié)構(gòu)運動文胸產(chǎn)生差異的原因。為今后運動文胸產(chǎn)品的開發(fā)和設(shè)計提出建議。為女性跑步者提出運動文胸的選擇意見,以獲得更好的運動體驗。研究方法:選取14名乳房罩杯為B-C的女性,裸胸及穿著三款不同肩帶的運動文胸在跑步機上以9km/h的速度跑10min。應(yīng)用Motion 8鏡頭的紅外高速運動捕捉系統(tǒng)采集運動過程中乳房的運動學(xué)數(shù)據(jù),采集頻率為200Hz;使用DELSYS無線便攜式表面肌電測試儀收集肌肉電信號,采集頻率設(shè)置為2000Hz;使用NOVEL壓力感受器測量受試者靜態(tài)站立時運動文胸對軀干的壓力。研究結(jié)果:1.H型肩帶在肩帶與肩胛骨下方的交點的壓強顯著小于X型肩帶和O型肩帶。2.H型運動文胸的前后方向位移振幅顯著大于X型和O型,并且與裸胸狀態(tài)沒有差異;H型運動文胸在前后方向的位移變化率顯著小于X型和O型;H型運動文胸在左右方向的位移變化率顯著小于O型;H型運動文胸在上下方向的位移變化率顯著大于X型和O型。3.在1.5km時,裸胸狀態(tài)下胸大肌的RMS和IEMG與O型有顯著性差異,裸胸時三角肌前束的RMS和IEMG與H型有顯著性差異,X型運動文胸的斜方肌下束的RMS和IEMG與O型有顯著性差異。研究結(jié)論:1.三款運動文胸,除肩帶外其它部位的結(jié)構(gòu)及壓強相似,不同肩帶之間的差異主要為背部結(jié)構(gòu)的不同,從而造成背部壓強的不同,H型運動文胸在肩胛骨處的壓強較小,X型和O型運動文胸在肩胛骨處的壓強較大。2.H型結(jié)構(gòu)設(shè)計對乳房上下方向的支撐承托作用較好,X型和O型結(jié)構(gòu)設(shè)計對乳房左右和前后方向的限制較好。3.裸胸與穿著運動文胸跑步時相關(guān)肌肉的活動有顯著性差異,均為裸胸的肌肉活動顯著大于穿著運動文胸。三款運動文胸之間的肌肉活動差異較小。運動的時間越長,運動文胸對肌肉活動的影響越明顯。
[Abstract]:Objective: to study the effect of different shoulder band structure sports bra on breast support effect and muscle activity during running, and to analyze the reasons for the difference of three shoulder band structure exercise bras with pressure value and subjective questionnaire. Suggestions are made for the development and design of sports bra products in the future. Suggest bra options for female runners for a better exercise experience. Methods: fourteen women with B-C breast cup were selected to run on the treadmill at 9km/h speed for 10 mins with bare breasts and three sports bras with different shoulder straps. The high speed infrared motion capture system of Motion 8 lens is used to collect the kinematics data of the breast in the process of motion, the frequency is 200Hz, the DELSYS portable surface electromyograph is used to collect the electromyography signals, and the frequency is set to 2000Hz. A NOVEL baroreceptor was used to measure the pressure of the exercise bra on the torso during static standing. Results: 1. The pressure of H type shoulder strap at the point below shoulder strap and scapula is significantly lower than that of X type shoulder band and O type shoulder band. 2. The amplitude of displacement in front and back direction of H type sports bra is significantly larger than that of X type and O type. And there was no difference between bare chest state and bare chest state. The displacement change rate of H type exercise bra was significantly lower than that of X type and O type, and that of H type exercise bra in left and right directions was significantly lower than that of O type. The displacement change rate of H type sports bra in the upper and lower directions was significantly higher than that of X type and O type. At 1.5km, the RMS and IEMG of pectoralis major muscle were significantly different from those of O type in bare chest, the RMS and IEMG of deltoid anterior bundle were significantly different from those of H type in bare chest, and the RMS and IEMG of the inferior trapezius bundle of type X exercise bra were significantly different from those of O type. Conclusion: 1. The structure and pressure of the three sports bras are similar except the shoulder straps. The differences between the shoulder straps are mainly the differences of the back structures, which result in the difference of the back pressure, and the pressure of the H-type exercise bras at the scapular bone is smaller. The pressure of X type and O type exercise bra is larger at the scapula. 2. H type structure design has better support effect on the upper and lower direction of breast, and X and O type structure design has better restriction on breast left and right direction and front and rear direction. 3. There was significant difference in the muscle activity between running with bare chest and wearing sports bra. The muscle activity of bare chest was significantly higher than that of wearing sports bra. There is a small difference in muscle activity between the three sports bras. The longer the exercise lasts, the more significant the effect of the bra on muscle activity.
【學(xué)位授予單位】：北京體育大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：G804.6

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