Effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over study
Abstract Background Hydration status affects endurance performance. Pre-exercise hydration recommendations target the consumption of high carbohydrate and sodium beverages. Milk, due to its carbohydrate and sodium content, may be considered an effective pre-exercise hydration beverage. Purpose In a...
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doaj-a7b40ce91c564e8f9d8fcb959e9bec872020-11-25T02:54:28ZengBMCJournal of the International Society of Sports Nutrition1550-27832020-03-011711510.1186/s12970-020-00346-9Effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over studyDanniela García-Berger0Karen Mackay1Matias Monsalves-Alvarez2Carlos Jorquera3Rodrigo Ramirez-Campillo4Hermann Zbinden-Foncea5Mauricio Castro-Sepulveda6Nutrition and Exercise laboratory, Faculty of Medicine, Universidad MayorSchool of Exercise and Nutrition, Faculty of Health, Queensland University of TechnologyHuman Performance Laboratory, Motion Health & Performance CenterNutrition and Exercise laboratory, Faculty of Medicine, Universidad MayorLaboratory of Human Performance. Quality of Life and Wellness Research Group. Department of Physical Activity Sciences, Universidad de Los LagosExercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Universidad Finis TerraeExercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Universidad Finis TerraeAbstract Background Hydration status affects endurance performance. Pre-exercise hydration recommendations target the consumption of high carbohydrate and sodium beverages. Milk, due to its carbohydrate and sodium content, may be considered an effective pre-exercise hydration beverage. Purpose In a randomized cross-over trial, we compared the effects of an isotonic sport drink (SPD) with skim milk (SM) consumption before a race, on fluid homeostasis and time-trial performance in road cyclists. Methods Male road cyclists (n = 9; age, 26.8 ± 4.78 years) with 10.8 ± 8.56 years of experience in national competitions, consumed either SPD or SM in doses of 350 mL at 3 h and 350 mL at 1.5 h before a 18.6 km time-trial race. Measurements of body mass, urine specific gravity (USG), urine color and time-trial were compared between drinks (group; g) before and after the race (time; t). Results The two-way ANOVA showed no differences between SPD and SM in body mass (t, p < 0.0001; g, p = 0.89; t × g, p = 0.54), USG (t, p = 0.01; g, p = 0.63; t × g, p = 0.29) and urine color (t, p = 0.01; g, p = 0.54; t × g, p = 0.28) before or after race. Furthermore, no differences on water consumption during the race (p = 0.55) or time-trial performance (p = 0.84) were observed between trials. Conclusion Current results may help athletes with different beverages preferences to increase their options of hydration strategies.http://link.springer.com/article/10.1186/s12970-020-00346-9HydrationSport drinkMilkCyclistsEndurance sportUrine specific gravity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Danniela García-Berger Karen Mackay Matias Monsalves-Alvarez Carlos Jorquera Rodrigo Ramirez-Campillo Hermann Zbinden-Foncea Mauricio Castro-Sepulveda |
spellingShingle |
Danniela García-Berger Karen Mackay Matias Monsalves-Alvarez Carlos Jorquera Rodrigo Ramirez-Campillo Hermann Zbinden-Foncea Mauricio Castro-Sepulveda Effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over study Journal of the International Society of Sports Nutrition Hydration Sport drink Milk Cyclists Endurance sport Urine specific gravity |
author_facet |
Danniela García-Berger Karen Mackay Matias Monsalves-Alvarez Carlos Jorquera Rodrigo Ramirez-Campillo Hermann Zbinden-Foncea Mauricio Castro-Sepulveda |
author_sort |
Danniela García-Berger |
title |
Effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over study |
title_short |
Effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over study |
title_full |
Effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over study |
title_fullStr |
Effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over study |
title_full_unstemmed |
Effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over study |
title_sort |
effects of skim milk and isotonic drink consumption before exercise on fluid homeostasis and time-trial performance in cyclists: a randomized cross-over study |
publisher |
BMC |
series |
Journal of the International Society of Sports Nutrition |
issn |
1550-2783 |
publishDate |
2020-03-01 |
description |
Abstract Background Hydration status affects endurance performance. Pre-exercise hydration recommendations target the consumption of high carbohydrate and sodium beverages. Milk, due to its carbohydrate and sodium content, may be considered an effective pre-exercise hydration beverage. Purpose In a randomized cross-over trial, we compared the effects of an isotonic sport drink (SPD) with skim milk (SM) consumption before a race, on fluid homeostasis and time-trial performance in road cyclists. Methods Male road cyclists (n = 9; age, 26.8 ± 4.78 years) with 10.8 ± 8.56 years of experience in national competitions, consumed either SPD or SM in doses of 350 mL at 3 h and 350 mL at 1.5 h before a 18.6 km time-trial race. Measurements of body mass, urine specific gravity (USG), urine color and time-trial were compared between drinks (group; g) before and after the race (time; t). Results The two-way ANOVA showed no differences between SPD and SM in body mass (t, p < 0.0001; g, p = 0.89; t × g, p = 0.54), USG (t, p = 0.01; g, p = 0.63; t × g, p = 0.29) and urine color (t, p = 0.01; g, p = 0.54; t × g, p = 0.28) before or after race. Furthermore, no differences on water consumption during the race (p = 0.55) or time-trial performance (p = 0.84) were observed between trials. Conclusion Current results may help athletes with different beverages preferences to increase their options of hydration strategies. |
topic |
Hydration Sport drink Milk Cyclists Endurance sport Urine specific gravity |
url |
http://link.springer.com/article/10.1186/s12970-020-00346-9 |
work_keys_str_mv |
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