The Influence of Heat Acclimation and Hypohydration on Post-Weight-Loss Exercise Performance.
Int J Sports Physiol Perform
; 15(2): 213-221, 2020 02 01.
Article
en En
| MEDLINE
| ID: mdl-31094260
ABSTRACT
PURPOSE:
To examine the influence of fluid intake on heat acclimation and the subsequent effects on exercise performance following acute hypohydration.METHODS:
Participants were randomly assigned to 1 of 2 groups, either able to consume water ad libitum (n = 10; age 23 [3] y, height 1.81 [0.09] m, body mass 87 [13] kg; HAW) or not allowed fluid (n = 10; age 26 [5] y, height 1.76 [0.05] m, body mass 79 [10] kg; HANW) throughout 12 × 1.5-h passive heat-acclimation sessions. Experimental trials were completed on 2 occasions before (2 baseline trials) and 1 following the heat-acclimation sessions. These sessions involved 3 h of passive heating (45°C, 38% relative humidity) to induce hypohydration followed by 3 h of ad libitum food and fluid intake after which participants performed a repeat sled-push test to assess physical performance. Urine and blood samples were collected before, immediately, and 3 h following hypohydration to assess hydration status. Mood was also assessed at the same time points.RESULTS:
No meaningful differences in physiological or performance variables were observed between HANW and HAW at any time point. Using pooled data, mean sprint speed was significantly (P < .001) faster following heat acclimation (4.6 [0.7] s compared with 5.1 [0.8] s). Furthermore, heat acclimation appeared to improve mood following hypohydration.CONCLUSIONS:
Results suggest that passive heat-acclimation protocols may be effective at improving short-duration repeat-effort performance following acute hypohydration.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Pérdida de Peso
/
Deshidratación
/
Ingestión de Líquidos
/
Rendimiento Atlético
/
Calor
/
Aclimatación
Tipo de estudio:
Clinical_trials
Límite:
Humans
/
Male
Idioma:
En
Revista:
Int J Sports Physiol Perform
Asunto de la revista:
FISIOLOGIA
/
MEDICINA ESPORTIVA
Año:
2020
Tipo del documento:
Article