李上校,任景萍,周兴龙.不同步频下运动文胸对乳房运动特征及步态参数的影响[J].北京体育大学学报,2018,41(1):82-88.
不同步频下运动文胸对乳房运动特征及步态参数的影响
Influence of Sports Bra on Breast Kinematic Characteristics and the Gait Parameters Under Different Stride Frequencies
投稿时间:2017-03-16  
DOI:10.19582/j.cnki.11-3785/g8.2018.01.012
中文关键词:  关键词:运动文胸  乳房  步频  躯干  运动学
英文关键词:Keywords: sports bra  breast  step frequency  trunk  kinematics
基金项目:基金项目:北京市教育委员会科技计划一般项目。
作者单位
李上校 北京体育大学北京 100084 
任景萍 首都体育学院北京 100091 
周兴龙 北京体育大学北京 100084 
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中文摘要:
      摘要:目的:比较以同一步速3种步频行走时乳房不同支撑状态对人体姿态和乳房运动学参数的影响,为女性运动及运动文胸设计与选择提供建议参考。方法:12名C罩杯女性分别在穿着运动文胸或裸胸状态以3种步频在跑步机上行走,使用红外光点运动捕捉系统(200 HZ)采集躯干姿态和乳房的运动学参数。结果:穿着运动文胸状态躯干屈曲角幅度(P=0.042)、躯干扭转角(P=0.015)幅度和乳房各点位移(P<0.001)、速度(P<0.001)显著小于裸胸状态。步频显著影响躯干屈曲角及扭转角的运动范围(P<0.05),慢步频的乳房各点位移幅度较正常步频及快步频大(P<0.05),快步频的垂直方向速度变化明显较其他两步频大(P<0.05)。回归分析表明躯干扭转角与乳房下点左右方向位移幅度正相关,躯干屈曲角运动幅度与乳房内点垂直方向位移幅度正相关。结论:乳房不同支撑状态影响乳房运动位移,乳房位移幅度会影响躯干运动范围。相同速度不同步频运动时,慢步频的躯干运动幅度和乳房位移幅度最大,快步频乳房各点垂直方向速度较大。
英文摘要:
      Abstract:Objective: Purpose: This study compared the influence of different breast supporting conditions on body posture and kinematics parameters of breasts under three stride frequencies, for providing theoretical reference for women's movement, and the design and selection of women’s sports bra. Methods: 12 C cup women with sports bra or without bra, walked on a treadmill with three stride frequencies. The body posture and kinematics parameters of breast were collected by Qualisys Track Manager high-speed infrared motion capture system with 10 cameras (200 HZ). Results: The range of angles of trunk flexion (P = 0.042) and trunk torsion (P = 0.015), breast displacement (P < 0.001) and moving speed (P < 0.001) were smaller when wearing sports bra compared with bare-breasted condition. The stride frequency significantly influences the range of trunk flexion angle and twist angle (P < 0.05), the breast displacement was larger in low stride frequency than in normal and quick ones (P < 0.05), the breast moving speed was larges in quick stride frequency than in other stride frequencies (P < 0.05). Regression analysis showed a positive correlation between the trunk twist angle and the horizontal displacement of the lower breast point, and a positive correlation between the trunk flexion angle and vertical displacement of the medial breast point. Conclusions: Different breast supporting conditions influence the displacement of breasts, and the displacement of breasts can influence the range of trunk motion. When people doing the same speed exercise, the amplitude of their trunk movement and breast displacement is the largest in slow stride frequency, and the vertical displacement amplitude of breasts is the largest in quick stride frequency.
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