Pedalling Cadence Affects VÌ o2 Kinetics in Severe-Intensity Exercise.
J Strength Cond Res
; 37(6): 1211-1217, 2023 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-36730543
ABSTRACT
ABSTRACT Hill, DW and Vingren, JL. Pedalling cadence affects VÌ o2 kinetics in severe-intensity exercise. J Strength Cond Res 37(6) 1211-1217, 2023-The purpose was to investigate the effects of pedalling cadence on VÌ o2 kinetics in severe-intensity cycling exercise. This question is pertinent to exercise testing, where cadence is an important (and often confounding) variable, and to performance, where VÌ o2 kinetics determines the initial reliance upon anaerobic reserves. Eighteen university students performed tests to exhaustion at 241 ± 31 W, using cadences of 60, 80, and 100 rev·min -1 . VÌ o2 data were fitted to a 2-component model (primary phase + slow component). Responses during the 3 tests were compared using a repeated-measures analysis of variance, with significance at p < 0.05. The mean response time of the primary phase of the VÌ o2 response (time to reach 63% of the response) was progressively smaller (response was faster) at higher cadences (37 ± 4 seconds at 60 rev·min -1 , 32 ± 5 seconds at 80 rev·min -1 , 27 ± 4 seconds at 100 rev·min -1 ), and there was a concomitantly faster heart rate response. In addition, the time delay before the slow component was shorter, the amplitude of the primary phase was greater, and the amplitude of the slow component was smaller at the higher cadence. The results suggest that pedalling cadence itself-and not just the higher metabolic demand associated with higher cadences-may be responsible for differences in temporal characteristics (time delays, time constants) of the primary and slow phases of the VÌ o2 response. Exercise scientists must consider, and coaches might apply, the relationship between VÌ o2 kinetics and pedalling cadence during exercise testing.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Consumo de Oxigênio
/
Exercício Físico
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article