Bellinger Phillip, Morris Will, Roberts Llion
Griffith Sport Science, Griffith University, Southport, QLD, 4215, Australia.
School of Allied Health, Sport and Social Work, Griffith University, Southport, QLD, 4215, Australia.
Eur J Appl Physiol. 2025 Jul 24. doi: 10.1007/s00421-025-05903-1.
The present study aimed to investigate which of two commonly performed running interval sessions elicited the greatest magnitude of and time spent with elevated muscle deoxygenation in trained middle-distance runners. Thirteen trained middle-distance runners (22.4 ± 3.2 y; 63.1 ± 10.9 kg; n = 9 males) participated in the study. Subjects completed a field-based incremental running test and two interval sessions. The interval sessions comprised a 6 × 1 km and a 15 × 400 m interval session, both with 1 min passive recovery periods. Both sessions were implemented with the aim of achieving the maximal sustainable pace for each repetition, while mean speed, heart rate, RPE, blood lactate concentration and muscle deoxygenation responses were monitored. Mean speed during the interval repetitions was significantly higher during the 400 m intervals (~ 5.63 ± 0.35 m·s vs ~ 5.30 ± 0.28 m·s; p < 0.001). Both the peak magnitude of muscle deoxygenation (absolute difference ± CI 3.42 ± 2.23%; p = 0.006) and the time spent with values > 60% peak muscle deoxygenation (83.5 ± 66.4 s; p = 0.02) were significantly greater during the 400 m intervals, while the time spent with a heart rate > 90% peak heart rate was significantly longer during the 1 km interval session (570 ± 143, p < 0.001). Despite this, there was no difference in RPE, blood lactate concentration or peak heart rate between sessions. These findings suggest that 1 km intervals may preferentially target central physiologic responses while 400 m intervals may elicit greater peripheral physiological responses in trained middle-distance runners.
本研究旨在调查在训练有素的中长跑运动员中，两种常见的跑步间歇训练课程中，哪一种会引发最大程度的肌肉脱氧以及肌肉脱氧时间延长。13名训练有素的中长跑运动员（22.4±3.2岁；63.1±10.9千克；n = 9名男性）参与了该研究。受试者完成了一项基于场地的递增跑步测试和两个间歇训练课程。间歇训练课程包括一个6×1千米和一个15×400米的间歇训练课程，两者均有1分钟的被动恢复期。两个课程的实施目的都是为了在每次重复中达到最大可持续配速，同时监测平均速度、心率、主观用力程度（RPE）、血乳酸浓度和肌肉脱氧反应。在400米间歇期间，间歇重复过程中的平均速度显著更高（5.63±0.35米·秒对5.30±0.28米·秒；p<0.001）。在400米间歇期间，肌肉脱氧的峰值幅度（绝对差值±可信区间3.42±2.23%；p = 0.006）和肌肉脱氧值>峰值60%的持续时间（83.5±66.4秒；p = 0.02）均显著更长，而在1千米间歇训练课程中，心率>峰值心率90%的持续时间显著更长（570±143，p<0.001）。尽管如此，两个课程之间的主观用力程度、血乳酸浓度或心率峰值并无差异。这些发现表明，在训练有素的中长跑运动员中，1千米间歇可能优先针对中枢生理反应，而400米间歇可能引发更大的外周生理反应。
