The Relationship between Inspiratory Muscle Strength and Cycling Performance: Insights from Hypoxia and Inspiratory Muscle Warm-Up.
J Funct Morphol Kinesiol
; 9(2)2024 May 31.
Article
em En
| MEDLINE
| ID: mdl-38921633
ABSTRACT
Hypoxia increases inspiratory muscle work and consequently contributes to a reduction in exercise performance. We evaluate the effects of inspiratory muscle warm-up (IMW) on a 10 km cycling time trial in normoxia (NOR) and hypoxia (HYP). Eight cyclists performed four time trial sessions, two in HYP (FiO2 0.145) and two in NOR (FiO2 0.209), of which one was with IMW (set at 40% of maximal inspiratory pressure-MIP) and the other was with the placebo effect (PLA set at 15% MIP). Time trials were unchanged by IMW (NORIMW 893.8 ± 31.5 vs. NORPLA 925.5 ± 51.0 s; HYPIMW 976.8 ± 34.2 vs. HYPPLA 1008.3 ± 56.0 s; p > 0.05), while ventilation was higher in HYPIMW (107.7 ± 18.3) than HYPPLA (100.1 ± 18.9 L.min-1; p ≤ 0.05), and SpO2 was lower (HYPIMW 73 ± 6 vs. HYPPLA 76 ± 6%; p ≤ 0.05). A post-exercise-induced reduction in inspiratory strength was correlated with exercise elapsed time during IMW sessions (HYPIMW r = -0.79; p ≤ 0.05; NORIMW r = -0.70; p ≤ 0.05). IMW did not improve the 10 km time trial performance under normoxia and hypoxia.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Funct Morphol Kinesiol
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Suíça