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Hydration status, fluid intake, and electrolyte losses in youth soccer players.
Int J Sports Physiol Perform 2012; 7(4):367-74IJ

Abstract

The purpose of the study was to determine the hydration status, fluid intake, and electrolyte losses of 21 male professional youth soccer players (age 17.1 ± 0.7 y) training in a cool environment. Pretraining and posttraining measurements of body mass, urine (freezing-point osmolality method), and sweat concentration (flame-emission spectroscopy) were collected. Fourteen players were found to be hypohydrated before training. The amount of fluid lost due to exercise equated to a 1.7% loss in body mass, which equated to a gross dehydration loss of 0.5%. Overall, the soccer players replaced 46% ± 88% of sweat loss during training, and only 4 remained hypohydrated after training. No significant correlations between sweat loss and sweat concentrations of Na+ (r = -.11, P = .67) or K+ (r = .14, P = .58) were found, but there was a significant correlation with Mg2+ (r = -.58, P < .009). This study found large variability in pretraining hydration status that the players were able to rehydrate during the training sessions. However, given the numbers starting training in a hypohydrated state, adequate hydration status before training should be considered by youth players, coaches, and sports-science support staff.

Authors+Show Affiliations

Children's Health and Exercise Research Centre, Sport and Health Sciences, University of Exeter, Exeter, UK.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22645198

Citation

Williams, Craig A., and Jamie Blackwell. "Hydration Status, Fluid Intake, and Electrolyte Losses in Youth Soccer Players." International Journal of Sports Physiology and Performance, vol. 7, no. 4, 2012, pp. 367-74.
Williams CA, Blackwell J. Hydration status, fluid intake, and electrolyte losses in youth soccer players. Int J Sports Physiol Perform. 2012;7(4):367-74.
Williams, C. A., & Blackwell, J. (2012). Hydration status, fluid intake, and electrolyte losses in youth soccer players. International Journal of Sports Physiology and Performance, 7(4), pp. 367-74.
Williams CA, Blackwell J. Hydration Status, Fluid Intake, and Electrolyte Losses in Youth Soccer Players. Int J Sports Physiol Perform. 2012;7(4):367-74. PubMed PMID: 22645198.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Hydration status, fluid intake, and electrolyte losses in youth soccer players. AU - Williams,Craig A, AU - Blackwell,Jamie, Y1 - 2012/05/29/ PY - 2012/5/31/entrez PY - 2012/5/31/pubmed PY - 2013/1/24/medline SP - 367 EP - 74 JF - International journal of sports physiology and performance JO - Int J Sports Physiol Perform VL - 7 IS - 4 N2 - The purpose of the study was to determine the hydration status, fluid intake, and electrolyte losses of 21 male professional youth soccer players (age 17.1 ± 0.7 y) training in a cool environment. Pretraining and posttraining measurements of body mass, urine (freezing-point osmolality method), and sweat concentration (flame-emission spectroscopy) were collected. Fourteen players were found to be hypohydrated before training. The amount of fluid lost due to exercise equated to a 1.7% loss in body mass, which equated to a gross dehydration loss of 0.5%. Overall, the soccer players replaced 46% ± 88% of sweat loss during training, and only 4 remained hypohydrated after training. No significant correlations between sweat loss and sweat concentrations of Na+ (r = -.11, P = .67) or K+ (r = .14, P = .58) were found, but there was a significant correlation with Mg2+ (r = -.58, P < .009). This study found large variability in pretraining hydration status that the players were able to rehydrate during the training sessions. However, given the numbers starting training in a hypohydrated state, adequate hydration status before training should be considered by youth players, coaches, and sports-science support staff. SN - 1555-0265 UR - https://www.unboundmedicine.com/medline/citation/22645198/Hydration_status_fluid_intake_and_electrolyte_losses_in_youth_soccer_players_ L2 - https://medlineplus.gov/dehydration.html DB - PRIME DP - Unbound Medicine ER -