The effects of low and normal dose ice slurry ingestion on endurance capacity and intestinal epithelial injury in the heat.
J Sci Med Sport
; 26(6): 278-284, 2023 Jun.
Article
em En
| MEDLINE
| ID: mdl-37179242
ABSTRACT
OBJECTIVES:
Compare the effects of ice slurry ingestion at low and normal doses on endurance capacity and exertional heat stress-induced gastrointestinal perturbations.DESIGN:
Randomised, cross-over design.METHODS:
Twelve physically active males completed four treadmill running trials, ingesting ice slurry (ICE) or ambient drink (AMB) at 2â¯g·kg-1 (Normal; N) or 1â¯g·kg-1 (Low; L) doses every 15-min during exercise and 8â¯g·kg-1 (N) or 4â¯g·kg-1 (L) pre- and post-exercise. Pre-, during and post-exercise serum intestinal fatty-acid binding protein ([I-FABP]) and lipopolysaccharide ([LPS]) concentrations were determined.RESULTS:
Pre-exercise gastrointestinal temperature (Tgi) was lower in Lâ¯+â¯ICE than Lâ¯+â¯AMB (pâ¯<â¯0.05), Nâ¯+â¯ICE than Nâ¯+â¯AMB (pâ¯<â¯0.001) and Nâ¯+â¯ICE than Lâ¯+â¯ICE (pâ¯<â¯0.001). Higher rate of Tgi rise (pâ¯<â¯0.05) and lower estimated sweat rate (pâ¯<â¯0.001) were observed in Nâ¯+â¯ICE than Nâ¯+â¯AMB. Rate of Tgi rise was similar at low dose (pâ¯=â¯0.113) despite a lower estimated sweat rate in Lâ¯+â¯ICE than L+AMB (pâ¯<â¯0.01). Time-to-exhaustion was longer in Lâ¯+â¯ICE than Lâ¯+â¯AMB (pâ¯<â¯0.05), but similar between Nâ¯+â¯ICE and Nâ¯+â¯AMB (pâ¯=â¯0.142) and Lâ¯+â¯ICE and Nâ¯+â¯ICE (pâ¯=â¯0.766). [I-FABP] and [LPS] were similar (pâ¯>â¯0.05).CONCLUSIONS:
Lâ¯+â¯ICE elicited a lower heat dissipation compensatory effect with similar endurance capacity as Nâ¯+â¯ICE. Ice slurry conferred no protection against exertional heat stress-induced gastrointestinal perturbations.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Temperatura Corporal
/
Transtornos de Estresse por Calor
Tipo de estudo:
Clinical_trials
Limite:
Humans
/
Male
Idioma:
En
Revista:
J Sci Med Sport
Assunto da revista:
MEDICINA ESPORTIVA
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Singapura