McGhee Deirdre E, Power Bruce M, Steele Julie R
Biomechanics Research Laboratory, Faculty of Health and Behavioural Sciences, University of Wollongong, Northfields Avenue, Wollongong, New South Wales 2522, Australia.
Br J Sports Med. 2007 Dec;41(12):879-83; discussion 883. doi: 10.1136/bjsm.2007.036251. Epub 2007 May 29.
To establish whether exercise-induced vertical breast displacement and discomfort in women with large breasts were reduced during deep water running compared to treadmill running.
Sixteen women (mean age = 32 years, range 19-43 years; mean mass = 74.1 kg, range 61-114 kg; mean height = 1.7 m, range 1.61-1.74 m), who were professionally sized to wear a C+ bra cup, were recruited as representative of women with large breasts. After extensive familiarisation, vertical breast motion of the participants was quantified as they ran at a self-selected stride rate on a treadmill and in 2.4 m deep water. Immediately after running, the subjects rated their breast discomfort and breast pain (visual analogue scale) and their perceived exertion (Borg scale). Breast discomfort, breast pain, perceived exertion, vertical breast displacement and vertical breast velocity were compared between the two experimental conditions.
Exercise-induced breast discomfort was significantly less and perceived exertion was significantly greater during deep water running relative to treadmill running. Although there was no significant between-condition difference in vertical breast displacement, mean peak vertical breast velocity was significantly (p<0.05) less during deep water (upward mean (SD): 29.7 (14.0) cm x s(-1); downward: 31.1 (17.0) cm x s(-1)) compared to treadmill running (upward mean (SD): 81.4 (21.7) cm x s(-1); downward: 100.0 (25.0) cm x s(-1)).
Deep water running was perceived as a more strenuous but comfortable exercise mode for women with large breasts. Increased comfort was attributed to reduced vertical breast velocity rather than reduced vertical breast displacement.
确定与跑步机跑步相比，深水跑步是否能减少大胸女性运动引起的乳房垂直位移和不适。
招募了16名女性（平均年龄=32岁，范围19 - 43岁；平均体重=74.1千克，范围61 - 114千克；平均身高=1.7米，范围1.61 - 1.74米），她们经专业测量适合佩戴C +罩杯胸罩，作为大胸女性的代表。在进行大量熟悉训练后，当参与者以自我选择的步频在跑步机上和2.4米深的水中跑步时，对其乳房垂直运动进行量化。跑步后立即让受试者对乳房不适和乳房疼痛（视觉模拟量表）以及自觉运动强度（Borg量表）进行评分。比较两种实验条件下的乳房不适、乳房疼痛、自觉运动强度、乳房垂直位移和乳房垂直速度。
与跑步机跑步相比，深水跑步期间运动引起的乳房不适明显减轻，自觉运动强度明显更大。虽然乳房垂直位移在两种条件之间没有显著差异，但与跑步机跑步相比，深水跑步时平均垂直乳房峰值速度显著更低（p<0.05）（向上平均（标准差）：29.7（14.0）厘米×秒-1；向下：31.1（17.0）厘米×秒-1），而跑步机跑步时为（向上平均（标准差）：81.4（21.7）厘米×秒-1；向下：100.0（25.0）厘米×秒-1）。
对于大胸女性来说，深水跑步被认为是一种更费力但更舒适的运动方式。舒适度的提高归因于乳房垂直速度的降低而非乳房垂直位移的减少。
