White Jennifer, Scurr Joanna, Hedger Wendy
Department of Sport and Exercise Science, University of Portsmouth, Portsmouth, U.K.
J Appl Biomech. 2011 Feb;27(1):47-53. doi: 10.1123/jab.27.1.47.
Comparisons of breast support requirements during overground and treadmill running have yet to be explored. The purpose of this study was to investigate 3D breast displacement and breast comfort during overground and treadmill running. Six female D cup participants had retro-reflective markers placed on the nipples, anterior superior iliac spines and clavicles. Five ProReflex infrared cameras (100 Hz) measured 3D marker displacement in four breast support conditions. For overground running, participants completed 5 running trials (3.1 m/s ± 0.1 m/s) over a 10 m indoor runway; for treadmill running, speed was steadily increased to 3.1 m/s and 5 gait cycles were analyzed. Subjective feedback on breast discomfort was collected using a visual analog scale. Running modality had no significant effect on breast displacement (p > .05). Moderate correlations (r = .45 to .68, p < .05) were found between breast discomfort and displacement. Stride length (m) and frequency (Hz) did not differ (p < .05) between breast support conditions or running modalities. Findings suggest that breast motion studies that examine treadmill running are applicable to overground running.
尚未对地面跑步和跑步机跑步过程中乳房支撑需求进行比较。本研究的目的是调查地面跑步和跑步机跑步过程中乳房的三维位移及乳房舒适度。六名女性D罩杯参与者在乳头、前上棘和锁骨处放置了反光标记。五台ProReflex红外摄像机（100赫兹）在四种乳房支撑条件下测量标记的三维位移。对于地面跑步，参与者在10米室内跑道上完成5次跑步试验（速度为3.1米/秒±0.1米/秒）；对于跑步机跑步，速度稳步增加至3.1米/秒，并分析5个步态周期。使用视觉模拟量表收集关于乳房不适的主观反馈。跑步方式对乳房位移无显著影响（p>.05）。发现乳房不适与位移之间存在中度相关性（r=.45至.68，p<.05）。在不同乳房支撑条件或跑步方式之间，步长（米）和步频（赫兹）没有差异（p<.05）。研究结果表明，研究跑步机跑步的乳房运动研究适用于地面跑步。
