Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Italy.
Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Italy; Department of Clinical and Biological Sciences, University of Turin, Italy.
J Sci Med Sport. 2022 Jan;25(1):70-74. doi: 10.1016/j.jsams.2021.07.013. Epub 2021 Aug 5.
To investigate the impact of fast-start, steady or slow-start strategies of the running fraction in sprint triathlon on oxygen consumption, perception of fatigue and blood lactate.
Thirteen male triathletes (age; 36.4 ± 10.8 yy, height 174.8 ± 7.9 cm, body mass 70.6 ± 11.1 kg; V'O 62.4 ± 8.9 ml min kg; mean ± SD) attended the laboratory five times in order to complete two incremental tests and three subsequent cycle-run sessions.
Three experimental randomized sessions with different effort distribution were compared. The intensities of the 1st running kilometer were set at 95%, 100% and 105% of the second ventilatory threshold for slow, continuous and fast start protocol respectively. Measurement of ventilatory variables, blood lactate and ratings of perceived exertion were collected throughout all sessions.
A meaningful difference was found between the slow versus fast start protocol in V'O (SE = 0.58, P = 0.0005), BLa (SE = 0.21, P = 0.0097), HR (SE = 1.23, P = 0.0011) and RPE (SE = 2.83, P = 0.0047) values. No differences in-between protocols were found at the end of the running bout whatever the condition.
Differences in physiological parameters were found between protocols during the first kilometer, not at the end of exercise. The fast start appears to be more correct and useful for performance in racing setting and may be used as a strategy without impacting the remaining running bout in ecological setting.
探讨 sprint 三项全能运动中跑步分段的快速启动、稳定启动和缓慢启动策略对耗氧量、疲劳感和血乳酸的影响。
13 名男性三项全能运动员（年龄 36.4±10.8 岁，身高 174.8±7.9cm，体重 70.6±11.1kg；V'O62.4±8.9ml/min/kg；均值±标准差）参加了实验室 5 次，以完成 2 次递增测试和 3 次随后的自行车跑步测试。
比较了 3 种不同用力分布的实验随机分组。第 1 公里跑步的强度分别设定为慢启动、连续启动和快速启动协议中第 2 个呼吸阈的 95%、100%和 105%。在所有测试中，收集了呼吸变量、血乳酸和主观感觉用力的测量值。
在 V'O（SE=0.58，P=0.0005）、BLa（SE=0.21，P=0.0097）、HR（SE=1.23，P=0.0011）和 RPE（SE=2.83，P=0.0047）值方面，缓慢启动与快速启动方案之间存在显著差异。无论条件如何，在跑步结束时，3 种方案之间没有差异。
在第 1 公里跑步期间，在生理参数方面，3 种方案之间存在差异，但在跑步结束时没有差异。快速启动似乎更适合比赛环境下的表现，并且可以作为一种策略而不影响生态环境中的剩余跑步阶段。
