Ozkaya Ozgur, Balci Gorkem Aybars, As Hakan, Cabuk Refik, Norouzi Mahdi
Coaching Education Department, Faculty of Sport Sciences, Ege University, Bornova, Turkey.
Department of Sport and Health Sciences, Faculty of Sport Sciences, Ege University, Bornova, Turkey ; and.
J Strength Cond Res. 2022 Jan 1;36(1):113-120. doi: 10.1519/JSC.0000000000003427.
Ozkaya, O, Balci, GA, As, H, Cabuk, R, and Norouzi, M. Grey zone: A gap between heavy and severe exercise domain. J Strength Cond Res 36(1): 113-120, 2022-The aim of this study was to determine a critical threshold (CT) interpreted as "the highest exercise intensity where V̇o2 can be stabilized before reaching 95% of V̇o2max (V̇o2peak)" and compare it with commonly used anaerobic threshold indices. Ten well-trained male cyclists volunteered for this study. Ventilatory threshold (VT) was determined from incremental tests. Multisession constant-load trials were performed to reveal V̇o2max. Mathematically modeled critical power (CP) was estimated through the best individual fit parameter method. Maximal lactate steady state (MLSS) was detected by 30-minute constant-load exercises. The individual CT load of each cyclist was tested by constant-load exercises to exhaustion with +15 W intervals until minimal power output to elicit V̇o2peak. The results showed that work rate corresponding to CT (329.5 ± 41.5 W) was significantly greater than that of the MLSS (269.5 ± 38.5 W; p = 0.000), VT (279.6 ± 33 W; p = 0.000), and CP (306.3 ± 39.4 W; p = 0.000), and CP overestimated both VT and MLSS (p = 0.000). There was no significant V̇o2 difference between the 10th and 30th minute of MLSS and MLSS + 15 W exercise (0.36-0.13 ml·min-1·kg-1; p = 0.621). Exercising V̇o2 response of MLSS + 15 W could not exceed the level of 95% V̇o2max (57.02 ± 3.87 ml·min-1·kg-1 and 87.2 ± 3.1% of V̇o2max; p = 0.000), whereas V̇o2 responses greater than 95% of V̇o2max were always attained during exercises performed at CT + 15 W (64.52 ± 4.37 ml·min-1·kg-1 and 98.6 ± 1% of V̇o2max; p > 0.05). In conclusion, this study indicates that there is a "grey zone" between heavy and severe exercise domain. This information may play a key role in enhancing athletic performance by improving the quality of training programs.
奥兹卡亚、O、巴尔奇、GA、阿斯、H、卡布克、R和诺鲁齐、M。灰色区域：重度与极重度运动区间的差距。《力量与体能研究杂志》36(1): 113 - 120, 2022年——本研究的目的是确定一个临界阈值（CT），解释为“在达到最大摄氧量（V̇o2峰值）的95%之前V̇o2能够稳定的最高运动强度”，并将其与常用的无氧阈值指标进行比较。十名训练有素的男性自行车运动员自愿参加本研究。通过递增测试确定通气阈值（VT）。进行多节次恒定负荷试验以揭示V̇o2峰值。通过最佳个体拟合参数法估计数学建模的临界功率（CP）。通过30分钟的恒定负荷运动检测最大乳酸稳态（MLSS）。通过以+15瓦间隔进行恒定负荷运动直至力竭来测试每位自行车运动员的个体CT负荷，直到引出V̇o2峰值的最小功率输出。结果表明，对应于CT的工作率（329.5±41.5瓦）显著高于MLSS（269.5±38.5瓦；p = 0.000）、VT（279.6±33瓦；p = 0.000）和CP（306.3±39.4瓦；p = 0.000），并且CP高估了VT和MLSS（p = 0.000）。MLSS和MLSS + 15瓦运动的第10分钟和第30分钟之间的V̇o2没有显著差异（0.36 - 0.1（此处原文有误，推测应为0.13）毫升·分钟-1·千克-1；p = 0.621）。MLSS + 15瓦运动的V̇o2反应不能超过95% V̇o2峰值水平（57.02±3.87毫升·分钟-1·千克-1和V̇o2峰值的87.2±3.1%；p = 0.000），而在CT + 15瓦运动期间总是能达到大于95% V̇o2峰值的V̇o2反应（64.52±4.37毫升·分钟-
