Differences in the ventilatory thresholds in treadmill according to training status in 971 males and 301 females: a cross-sectional study.

IF 2.8 3区医学 Q2 PHYSIOLOGY

European Journal of Applied Physiology Pub Date : 2024-09-24 DOI:10.1007/s00421-024-05622-z

José Antonio Benítez-Muñoz, Pedro J Benito, Isabel Guisado-Cuadrado, Rocío Cupeiro, Ana Belén Peinado

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引用次数: 0

Abstract

Purpose: To analyze the influence of training status on the percentage of maximum oxygen consumption, heart rate and velocity (%VO_2max, %HR_max and %V_max) at which ventilatory threshold 1 and ventilatory threshold 2 occur (VT1 and VT2, respectively), in males and females separately considering age, during a ramp incremental treadmill test.

Methods: 791 males (36.8 ± 9.9 years) and 301 females (33.9 ± 11.0 years) performed a ramp incremental exercise test until fatigue where VT1 and VT2 were determined. Participants were classified as low, medium or high training status combining the oxygen consumption at VT1, VT2 and VO_2max by clustering analysis.

Results: VO_2max is poorly correlated with the %VO_2max, %HR_max and %V_max at which VT1 and VT2 occur (r < 0.3), in contrast, there is a positive correlation between oxygen consumption at VT1 and VT2 with the %VO_2max, %HR_max and %V_max at which VT1 and VT2, respectively, occur in males and females (r = 0.203-0.615). Furthermore, we observed the %VO_2max, %HR_max and %V_max at which thresholds occur were greater the higher the training status (all p < 0.003).

Conclusion: The physiological determinants of the percentage of maximum at which VT1 and VT2 occur are more related to oxygen consumption at VT1 and VT2, respectively, than to VO_2max. Moreover, due to the higher percentage of maximum at which VT1 and VT2 occur in individuals with a higher training status, the common strategy consisting of establishing exercise intensity as a fixed percentage of maximum might not be effective to match intensity across individuals with different training status.

Clinical trial registration: NCT06246760.

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971 名男性和 301 名女性在跑步机上的通气阈值因训练状况而异：一项横断面研究。

目的：分析在斜坡增量跑步机测试中，训练状态对男性和女性出现通气阈值1和通气阈值2（分别为VT1和VT2）时的最大耗氧量、心率和速度（%VO2max、%HRmax和%Vmax）百分比的影响。方法：791 名男性（36.8±9.9 岁）和 301 名女性（33.9±11.0 岁）进行了斜坡递增运动测试，直到疲劳为止，并测定了 VT1 和 VT2。通过聚类分析，结合 VT1、VT2 和 VO2max 的耗氧量，将参与者分为低、中、高训练状态：VO2max与VT1和VT2发生时的%VO2max、%HRmax和%Vmax相关性较差（男性和女性的VO2max、%HRmax和%Vmax分别与VT1和VT2发生时的%VO2max、%HRmax和%Vmax相关，r = 0.203-0.615）。此外，我们还观察到，训练状况越好，出现阈值的 VO2max%、HRmax%和 Vmax%越大（均为 p）：VT1 和 VT2 最大值百分比的生理决定因素分别与 VT1 和 VT2 的耗氧量有关，而不是与 VO2max 有关。此外，由于VT1和VT2在训练状态较好的个体中占最大值的百分比较高，因此将运动强度设定为最大值的固定百分比的通用策略可能无法有效匹配不同训练状态个体的运动强度：临床试验注册：NCT06246760。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Journal of Applied Physiology 医学-生理学

CiteScore

6.00

自引率

6.70%

发文量

227

审稿时长

3 months

期刊介绍： The European Journal of Applied Physiology (EJAP) aims to promote mechanistic advances in human integrative and translational physiology. Physiology is viewed broadly, having overlapping context with related disciplines such as biomechanics, biochemistry, endocrinology, ergonomics, immunology, motor control, and nutrition. EJAP welcomes studies dealing with physical exercise, training and performance. Studies addressing physiological mechanisms are preferred over descriptive studies. Papers dealing with animal models or pathophysiological conditions are not excluded from consideration, but must be clearly relevant to human physiology.