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Shifting the Energy Toward Los Angeles: Comparing the Energetic Contribution and Pacing Approach Between 2000- and 1500-m Maximal Ergometer Rowing

自感劳累评分 无氧运动 心率 赛艇 呼吸交换率 医学 计时审判 血乳酸 最大VO2 物理疗法 呼吸补偿 劳累 自感劳累 动物科学 内科学 心脏病学 血压 考古 生物 历史
作者
Daniel J. Astridge,Peter Peeling,Paul S.R. Goods,Olivier Girard,Sophie P. Watts,Myles C. Dennis,Martyn J. Binnie
出处
期刊:International Journal of Sports Physiology and Performance [Human Kinetics]
卷期号:19 (2): 133-141
标识
DOI:10.1123/ijspp.2023-0216
摘要

Purpose : To compare the energetic contribution and pacing in 2000- and 1500-m maximal rowing-ergometer performances. Methods : On separate visits (>48 h apart, random order), 18 trained junior (16.7 [0.4] y) male rowers completed 3 trials: a 7 × 4-minute graded exercise test, a 2000-m time trial (TT 2000 ), and a 1500-m TT (TT 1500 ). Respiratory gases were continuously measured throughout each trial. The submaximal power-to-oxygen-consumption relationship from the graded exercise test was used to determine the accumulated oxygen deficit for each TT. Differences in mean power output (MPO), relative anaerobic contribution, percentage of peak oxygen uptake, pacing index, maximum heart rate, rating of perceived exertion, and blood lactate concentration were assessed using linear mixed modeling. Results : Compared to TT 2000 (324 [24] W), MPO was 5.2% (3.3%) higher in TT 1500 (341 [29 W]; P < .001, ). There was a 4.9% (3.3%) increase ( P < .001, ) in anaerobic contribution from 17.3% (3.3%) (TT 2000 ) to 22.2% (4.3%) (TT 1500 ). Compared to TT 1500 , maximum heart rate, rating of perceived exertion, and blood lactate concentration were all greater ( P < .05) in TT 2000 . The pacing index was not different between trials. Percentage increase in MPO from TT 2000 to TT 1500 was negatively associated with pacing variance in TT 1500 ( R 2 = .269, P = .027). Conclusions : Maximal ergometer performance over 1500 m requires a significantly greater anaerobic contribution compared with 2000 m. Junior male athletes adopt a consistent pacing strategy across both distances. However, those who experienced greater percentage increases in MPO over the shorter test adopted a more even pacing strategy. To prepare for 1500-m performance, greater emphasis should be placed on developing capacity for work in the severe domain and completing race simulations with a more even pacing strategy.
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