Different categories of VO2 kinetics in the 'extreme' exercise intensity domain
Küçük Resim Yok
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
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.
Açıklama
Anahtar Kelimeler
All-Out, Maximal Sprint, Oxygen Uptake Kinetics, Supramaximal Exercise Zone
Kaynak
Journal of Sports Sciences
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
41
Sayı
23
