Locally applied heat stress during exercise training may promote adaptations to mitochondrial enzyme activities in skeletal muscle.
Pflugers Arch
; 476(6): 939-948, 2024 Jun.
Article
en En
| MEDLINE
| ID: mdl-38446167
ABSTRACT
There is some evidence for temperature-dependent stimulation of mitochondrial biogenesis; however, the role of elevated muscle temperature during exercise in mitochondrial adaptation to training has not been studied in humans in vivo. The purpose of this study was to determine the role of elevating muscle temperature during exercise in temperate conditions through the application of mild, local heat stress on mitochondrial adaptations to endurance training. Eight endurance-trained males undertook 3 weeks of supervised cycling training, during which mild (~ 40 °C) heat stress was applied locally to the upper-leg musculature of one leg during all training sessions (HEAT), with the contralateral leg serving as the non-heated, exercising control (CON). Vastus lateralis microbiopsies were obtained from both legs before and after the training period. Training-induced increases in complex I (fold-change, 1.24 ± 0.33 vs. 1.01 ± 0.49, P = 0.029) and II (fold-change, 1.24 ± 0.33 vs. 1.01 ± 0.49, P = 0.029) activities were significantly larger in HEAT than CON. No significant effects of training, or interactions between local heat stress application and training, were observed for complex I-V or HSP70 protein expressions. Our data provides partial evidence to support the hypothesis that elevating local muscle temperature during exercise augments training-induced adaptations to mitochondrial enzyme activity.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Adaptación Fisiológica
/
Ejercicio Físico
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Músculo Esquelético
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Respuesta al Choque Térmico
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Mitocondrias Musculares
Límite:
Adult
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Humans
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Male
Idioma:
En
Revista:
Pflugers Arch
Año:
2024
Tipo del documento:
Article
País de afiliación:
Nueva Zelanda
Pais de publicación:
Alemania