Hydration in sports on ice. Study of the child ice hockey player

Objectives- To study the water balance of the young ice hockey players (12 to 13 years old) during their training sessions and one match. Methods- Twenty one players of an ice hockey club are weighed before and after two training sessions and one match in order to evaluate their water balance in these different conditions. The exact amount of water ingested by each subject during the tests is measured. Results- Water intakes vary from 0.25 plus or minus 0.51 to 0.84 plus or minus 0.42 l h super(-1) (mean plus or minus standard deviation) in relation to the type of effort. The percentage of players who do not drink water falls from 65% at the first training session to 0% at the second one and the match. The highest loss is observed during the match. The average heart rate varies between 145 plus or minus 11 and 163 plus or minus 12 beats per minute during training and 171 plus or minus 8 beats per minute during the match. From 0 to 60% of the total time of the players is above the anaerobic threshold, which indicates a very high variability of energy expenditure. Conclusion- The water loss at the end of these tests is close to that observed by some authors for children during physical exercise. The tests show an increase in spontaneous drinking, as, after the second trial, a full rehydration of the players is observed.Original Abstract: Objectif- Etudier la balance hydrique de jeunes hockeyeurs sur glace (12-13 ans) pendant leurs entrainements et au cours d'un match. Methodes- Vingt et un joueurs benjamins (12-13 ans) d'un club de hockey sur glace, equipes d'un cardiofrequencemetre, sont peses avant et apres deux entrainements et un match de facon a evaluer leur deperdition hydrique dans des conditions differentes. Le volume exact d'eau ingeree par chaque sujet pendant les seances est mesure. Resultats- La prise d'eau varie entre 0,25 plus or minus 0,51 et 0,84 plus or minus 0,42 l h super(-1) (moyenne plus or minus ecart-type) selon Le type d'effort. Le pourcentage de joueurs ne buvant pas d'eau chute De 65 %, au premier entrainement, a 0 % au deuxieme et lors Du match. Les pertes les plus elevees sont observees lors Du match. La moyenne des frequences cardiaques varie entre 145 plus or minus 11 et 163 plus or minus 12 battements par minute pour les entrainements et s'etablit a 171 plus or minus 8 battements par minute lors Du match. Les joueurs evoluent De 0 a 60 % Du temps total au dessus Du seuil anaerobique theorique, ce qui traduit une tres grande var