Heavy-intensity priming exercise extends the VÌo2max plateau and increases peak-power output during ramp-incremental exercise.
Am J Physiol Regul Integr Comp Physiol
; 327(2): R164-R172, 2024 Aug 01.
Article
em En
| MEDLINE
| ID: mdl-38842514
ABSTRACT
This study investigated whether a heavy-intensity priming exercise precisely prescribed within the heavy-intensity domain would lead to a greater peak-power output (POpeak) and a longer maximal oxygen uptake (VÌo2max) plateau. Twelve recreationally active adults participated in this study. Two visits were required 1) a step-ramp-step test [ramp-incremental (RI) control], and 2) an RI test preceded by a priming exercise within the heavy-intensity domain (RI primed). A piecewise equation was used to quantify the VÌo2 plateau duration (VÌo2plateau-time). The mean response time (MRT) was computed during the RI control condition. The delta (Δ) VÌo2 slope (S; mL·min-1·W-1) and VÌo2-Y intercept (Y; mL·min-1) within the moderate-intensity domain between conditions (RI primed minus RI control) were also assessed using a novel graphical analysis. VÌo2plateau-time (P = 0.001; d = 1.27) and POpeak (P = 0.003; d = 1.08) were all greater in the RI primed. MRT (P < 0.001; d = 2.45) was shorter in the RI primed compared with the RI control. A larger ΔVÌo2plateau-time was correlated with a larger ΔMRT between conditions (r = -0.79; P = 0.002). This study demonstrated that heavy-intensity priming exercise lengthened the VÌo2plateau-time and increased POpeak. The overall faster RI-VÌo2 responses seem to be responsible for the longer VÌo2plateau-time. Specifically, a shorter MRT, but not changes in RI-VÌo2-slopes, was associated with a longer VÌo2plateau-time following priming exercise.NEW & NOTEWORTHY It remains unclear whether priming exercise extends the maximal oxygen uptake (VÌo2max) plateau and increases peak-power output (POpeak) during ramp-incremental (RI) tests. This study demonstrates that a priming exercise, precisely prescribed within the heavy-intensity domain, extends the plateau at VÌo2max and leads to a greater POpeak. Specifically, the extended VÌo2max plateau was associated with accelerated RI-VÌo2 responses.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Consumo de Oxigênio
/
Exercício Físico
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Am J Physiol Regul Integr Comp Physiol
Assunto da revista:
FISIOLOGIA
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Canadá