Millet G, Chollet D, Chatard J C
Department of Sports, University of Bath, UK.
Eur J Appl Physiol. 2000 Aug;82(5-6):465-71. doi: 10.1007/s004210000232.
The metabolic and drag responses, together with the distance between the draftee and the leader, were studied in six female triathletes swimming behind a lead swimmer who used either a two- or a six-beat kick, at an average velocity of 1.24 m x s(-1) (range 1.20-1.31). Drag was measured by passive towing. Oxygen consumption [49.1 (3.8) versus 50.4 (5.0) ml x min(-1) x kg(-1)], blood lactate [6.7 (2.3) versus 6.8 (1.9) mM], heart rate [172 (13.6) versus 173.5 (12.5) beats x min(-1)), rating of perceived exertion [13.7 (1.2) versus 13.5 (1.0)], stroke rate [38.3 (1.5) versus 39.5 (1.4) cycle x min(-1)], stroke length [1.95 (0.09) versus 1.89 (0.15) m x cycle(-1)] were not statistically different between the two-beat and the six-beat kick situations. The energy cost of swimming per unit of distance [0.65 (0.06) versus 0.67 (0.08) ml O2 x m(-1)] and the passive drag were similar for both kicks. The distance separating the draftee from the lead swimmer was between 14 cm and 85 cm and was inversely correlated with passive drag: r=-0.82, P < 0.05, for the two-beat kick and r=-0.82, P < 0.05, for the six-beat kick. The higher the passive drag, the closer the hand of the draftee to the feet of the lead swimmer. It was of no more benefit to triathletes to draft behind a two-beat kick swimmer than behind a six-beat kick swimmer.
对六名女子铁人三项运动员在一名采用双节拍或六节拍蹬腿的领泳者后方游泳时的代谢和阻力反应，以及被跟泳者与领泳者之间的距离进行了研究，平均速度为1.24米/秒（范围为1.20 - 1.31）。通过被动拖曳测量阻力。在双节拍和六节拍蹬腿情况下，耗氧量[49.1（3.8）对50.4（5.0）毫升·分钟⁻¹·千克⁻¹]、血乳酸[6.7（2.3）对6.8（1.9）毫摩尔]、心率[172（13.6）对173.5（12.5）次·分钟⁻¹]、主观用力程度评分[13.7（1.2）对13.5（1.0）]、划水频率[38.3（1.5）对39.5（1.4）次·分钟⁻¹]、划水长度[1.95（0.09）对1.89（0.15）米·次⁻¹]在统计学上无显著差异。两种蹬腿方式下每单位距离的游泳能量消耗[0.65（0.06）对0.67（0.08）毫升氧气·米⁻¹]和被动阻力相似。被跟泳者与领泳者之间的距离在14厘米至85厘米之间，且与被动阻力呈负相关：双节拍蹬腿时r = -0.82，P < 0.05；六节拍蹬腿时r = -0.82，P < 0.05。被动阻力越高，被跟泳者的手离领泳者的脚越近。对于铁人三项运动员来说，跟在双节拍蹬腿的游泳者后方并不比跟在六节拍蹬腿的游泳者后方更有益。
