Oxygen Uptake, Heart Rate, and Lactate Responses for Continuous Forward Running and Stop-and-Go Running with and Without Directional Changes.
Journal of strength and conditioning research(2020)
摘要
Bekraoui, N, Boussaidi, L, Cazorla, G, and Leger, L. Oxygen uptake, heart rate, and lactate responses for continuous forward running and stop-and-go running with and without directional changes. J Strength Cond Res 34(3): 699-707, 2020-The purpose of this study is to measure and quantify the differences for the gross oxygen uptake (V?o(2)), heart rate (HR), and blood lactate ([LA]) responses to various modes of in-line running. Twelve healthy participants did an indirect continuous multistage field test to determine the maximal aerobic speed (MAS) before randomly performing in separate sessions 1 of the 3 running protocols at 3 intensities (60, 70, and 80% MAS) (a) in-line continuous running (IR), (b) fractioned running (FR) with stop and go every 20 m, and (c) 20-m shuttle run (SR). V?o(2) varied between 34.2 +/- 2.5 and 54.6 +/- 5.4 ml center dot kg(-1)center dot min(-1), HR between 141 +/- 14 and 184 +/- 9 b center dot min(-1), and [LA] between 4.2 +/- 0.8 and 6.6 +/- 0.9 mmol center dot L-1. In-line continuous running V?o(2) was lower than those of SR and FR at all intensities (p < 0.05). However, SR V?o(2) were higher than those of FR at 80% MAS only. Heart rate was similar in SR and FR but lower in IR at all intensities (p < 0.05). No significant differences were recorded in [LA]. Because only V?o(2) was affected by the introduction of a 180 degrees angle directional change (SR vs. FR) at 80% MAS, the use of HR to assess such activities at such intensities will result in underestimating workloads. This study offers new insights into V?o(2), HR, and [LA] associated with accelerations while running with and without directional changes at submaximal speeds.
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关键词
acceleration,soccer,quantification
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