Different categories of VO2 kinetics in the 'extreme' exercise intensity domain

被引:3
作者
Ozkaya, Ozgur [1 ,5 ]
Jones, Andrew M. [2 ]
Burnley, Mark [3 ]
As, Hakan [4 ]
Balci, Gorkem A. [1 ]
机构
[1] Ege Univ, Fac Sports Sci, Dept Coaching Educ, Izmir, Turkiye
[2] Univ Exeter, Fac Hlth & Life Sci, Med Sch, Exeter, England
[3] Loughborough Univ, Sch Sport Exercise & Hlth Sci, Loughborough, England
[4] Ege Univ, Inst Hlth Sci, Dept Sports Hlth Sci, Izmir, Turkiye
[5] Ege Univ, Fac Sports Sci, Dept Coaching Educ, Ege Univ Main Campus, TR-35050 Bornova, Izmir, Turkiye
关键词
All-out; maximal sprint; oxygen uptake kinetics; supramaximal exercise zone; OXYGEN-UPTAKE KINETICS; O-2 UPTAKE KINETICS; CRITICAL POWER; PARAMETERS;
D O I
10.1080/02640414.2024.2316504
中图分类号
G8 [体育];
学科分类号
04 ; 0403 ;
摘要
The aim of this study was to classify potential sub-zones within the extreme exercise domain. Eight well-trained male cyclists participated in this study. The upper boundary of the severe exercise domain (Pupper-bound) was estimated by constant-work-rate tests. Then three further extreme-work-rate tests were performed in discrete regions within the extreme domain: extreme-1) at a work-rate greater than the Pupper-bound providing an 80-110-s time to task failure; extreme-2) a 30-s maximal sprint; and extreme-3) a 4-s maximal sprint. Different functions were used to describe the behaviour of the (V) over dot O-2 kinetics over time. (V) over dot O-2 on-kinetics during extreme-1 exercise was best described by a single-exponential model (R-2 >= 0.97; SEE <= 0.10; p < 0.001), and recovery (V) over dot O-2 decreased immediately after the termination of exercise. In contrast, (V) over dot O-2 on-kinetics during extreme-2 exercise was best fitted by a linear function (R-2 >= 0.96; SEE <= 0.16; p < 0.001), and (V) over dot O-2 responses continued to increase during the first 10-20 s of recovery. During the extreme-3 exercise, (V) over dot O-2 could not be modelled due to inadequate data, and there was an M-shape recovery (V) over dot O-2 response with an exponential decay at the end. The (V) over dot O-2 response to exercise across the extreme exercise domain has distinct features and must therefore be characterised with different fitting strategies in order to describe the responses accurately.
引用
收藏
页码:2144 / 2152
页数:9
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