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Grey Zone: A Gap Between Heavy and Severe Exercise Domain.

Abstract：

: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 XX(X): 000-000, 2020-The aim of this study was to determine a critical threshold (CT) interpreted as "the highest exercise intensity where V[Combining Dot Above]O2 can be stabilized before reaching 95% of V[Combining Dot Above]O2max (V[Combining Dot Above]O2peak)" 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 V[Combining Dot Above]O2max. 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 V[Combining Dot Above]O2peak. 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 V[Combining Dot Above]O2 difference between the 10th and 30th minute of MLSS and MLSS + 15 W exercise (0.36-0.13 ml·min·kg; p = 0.621). Exercising V[Combining Dot Above]O2 response of MLSS + 15 W could not exceed the level of 95% V[Combining Dot Above]O2max (57.02 ± 3.87 ml·min·kg and 87.2 ± 3.1% of V[Combining Dot Above]O2max; p = 0.000), whereas V[Combining Dot Above]O2 responses greater than 95% of V[Combining Dot Above]O2max were always attained during exercises performed at CT + 15 W (64.52 ± 4.37 ml·min·kg and 98.6 ± 1% of V[Combining Dot Above]O2max; 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.

journal_name

J Strength Cond Res

journal_title

Journal of strength and conditioning research

authors

Ozkaya O,Balci GA,As H,Cabuk R,Norouzi M

doi

10.1519/JSC.0000000000003427

subject

Has Abstract

pub_date

2020-03-04 00:00:00

eissn

1064-8011

issn

1533-4287

pub_type

杂志文章

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Grey Zone: A Gap Between Heavy and Severe Exercise Domain.