Basal Mild Dehydration Increase Salivary Cortisol After a Friendly Match in Young Elite Soccer Players

Frontiers in Physiology

Camila Monje¹  Jorge Cancino¹  Luis Peñailillo¹  Mauricio Castro-Sepulveda¹  Hermann Zbinden-Foncea¹  Felipe Abad-Colil²  Rodrigo Ramirez-Campillo³ 

[1] Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Universidad Finis Terrae, Santiago, Chile;Facultad de Ciencias de la Educación, Universidad San Sebastián, Valdivia, Chile;Laboratory of Human Performance, Research Nucleus in Health, Physical Activity and Sport, Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile;

关键词: hydration;    hormone;    endocrine;    saliva;    catabolic;    football;   

DOI  :  10.3389/fphys.2018.01347

来源: DOAJ

【 摘 要 】

A soccer match induce changes in physiological stress biomarkers as testosterone (T), cortisol (C), and testosterone:cortisol (T:C) ration. Hydration state may also modulate these hormones, and therefore may alter the anabolic/catabolic balance in response to soccer match. The role of hydration status before the match in this biomarkers has not yet been reported. The aim of this study was to compare the salivary T, C, and the T:C ratio responses after two friendly matches in well-hydrated and mild-dehydrated (MD) elite young male soccer player. Seventeen players (age, 16.8 ± 0.4 years; VO2max 57.2 ± 3.6 ml/kg−1/min−1) were divided into two teams. Before the matches the athletes were assessed for hydration level by the urine specific gravity method and divided for the analysis into well-hydrated (WH; n = 9; USG < 1.010 g/mL−1) and mild-dehydrated (MD; n = 8; USG 1.010 to 1.020 g/mL−1) groups. Hormones were collected before and after each match by saliva samples. The mean (HRmean) and maximal (HRmax) heart rate were measured throughout the matches. A two-way ANOVA was used to compare T, C, and T:C between and within groups. Similar HRmean (WH, 83.1 ± 4.7%; MD, 87.0 ± 4.1; p = 0.12) and HRmax (WH, 93.2 ± 4.4%; MD, 94.7 ± 3.7%; p = 0.52) were found for both groups during the matches. No differences were found before the matches in the T (p = 0.38), C (p = 66), nor T:C (p = 0.38) between groups. No changes within groups were found after matches in neither group for T (WH, p = 0.20; MD, p = 0.36), and T:C (WH, p = 0.94; MD, p = 0.63). Regarding the C, only the MD group showed increases (28%) after the matches (MD, p = 0.03; WH, p = 0.13). In conclusion MD group exacerbate the C response to friendly matches in elite young male soccer players, suggesting that dehydration before match may be an added stress to be considered.

【 授权许可】

Unknown