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Water and salt balance in young male football players in training during the holy month of Ramadan.
J Sports Sci 2008; 26 Suppl 3:S47-54JS

Abstract

The aim of this study was to assess water and salt balance in young football players in training during Ramadan. Measurements were made in 92 young male football players before and during the month of Ramadan. Fifty-five participants were observing Ramadan fasting, while the other 37 participants were eating and drinking without restriction. In week 3 of Ramadan, water and salt balance measures were made during a training session of 60-70 min duration that was performed at an ambient temperature of 25-28 degrees C and relative humidity of 50-53%. Body mass was recorded before and after training. Fluid intake was assessed in non-fasting players by weighing drink bottles before and after training, and the volume of any urine output was recorded. Sweat composition was estimated from absorbent patches applied to four skin sites for the duration of training. Mean sweat loss of players amounted to 1.41 litres (s = 0.36) in fasting players and 1.61 litres (s = 0.51) in non-fasting players (P = 0.038). Mean fluid intake during training in non-fasting players was 1.92 litres (s = 0.66). Sweat sodium concentration was 20 mmol . l(-1) (s = 8) in fasting players and 17 mmol . l(-1) (s = 7) in non-fasting players, and total sweat sodium loss during training was 0.67 g (s = 0.41) and 0.65 g (s = 0.37) [corresponding to a salt loss of 1.7 g (s = 1.1) and 1.7 g (s = 0.9)] respectively, with no difference between fasting and non-fasting players. Sweat sodium loss was not related to estimated dietary sodium intake (r = -0.07). These descriptive data show large individual variations in all measured parameters with relatively little difference in sweat parameters between fasting and non-fasting individuals.

Authors+Show Affiliations

School of Sport and Exercise Sciences, Loughborough University, Loughborough, UK.No affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

19085452

Citation

Shirreffs, Susan M., and Ronald J. Maughan. "Water and Salt Balance in Young Male Football Players in Training During the Holy Month of Ramadan." Journal of Sports Sciences, vol. 26 Suppl 3, 2008, pp. S47-54.
Shirreffs SM, Maughan RJ. Water and salt balance in young male football players in training during the holy month of Ramadan. J Sports Sci. 2008;26 Suppl 3:S47-54.
Shirreffs, S. M., & Maughan, R. J. (2008). Water and salt balance in young male football players in training during the holy month of Ramadan. Journal of Sports Sciences, 26 Suppl 3, pp. S47-54. doi:10.1080/02640410802428097.
Shirreffs SM, Maughan RJ. Water and Salt Balance in Young Male Football Players in Training During the Holy Month of Ramadan. J Sports Sci. 2008;26 Suppl 3:S47-54. PubMed PMID: 19085452.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Water and salt balance in young male football players in training during the holy month of Ramadan. AU - Shirreffs,Susan M, AU - Maughan,Ronald J, PY - 2008/12/17/entrez PY - 2009/3/28/pubmed PY - 2009/4/29/medline SP - S47 EP - 54 JF - Journal of sports sciences JO - J Sports Sci VL - 26 Suppl 3 N2 - The aim of this study was to assess water and salt balance in young football players in training during Ramadan. Measurements were made in 92 young male football players before and during the month of Ramadan. Fifty-five participants were observing Ramadan fasting, while the other 37 participants were eating and drinking without restriction. In week 3 of Ramadan, water and salt balance measures were made during a training session of 60-70 min duration that was performed at an ambient temperature of 25-28 degrees C and relative humidity of 50-53%. Body mass was recorded before and after training. Fluid intake was assessed in non-fasting players by weighing drink bottles before and after training, and the volume of any urine output was recorded. Sweat composition was estimated from absorbent patches applied to four skin sites for the duration of training. Mean sweat loss of players amounted to 1.41 litres (s = 0.36) in fasting players and 1.61 litres (s = 0.51) in non-fasting players (P = 0.038). Mean fluid intake during training in non-fasting players was 1.92 litres (s = 0.66). Sweat sodium concentration was 20 mmol . l(-1) (s = 8) in fasting players and 17 mmol . l(-1) (s = 7) in non-fasting players, and total sweat sodium loss during training was 0.67 g (s = 0.41) and 0.65 g (s = 0.37) [corresponding to a salt loss of 1.7 g (s = 1.1) and 1.7 g (s = 0.9)] respectively, with no difference between fasting and non-fasting players. Sweat sodium loss was not related to estimated dietary sodium intake (r = -0.07). These descriptive data show large individual variations in all measured parameters with relatively little difference in sweat parameters between fasting and non-fasting individuals. SN - 0264-0414 UR - https://www.unboundmedicine.com/medline/citation/19085452/Water_and_salt_balance_in_young_male_football_players_in_training_during_the_holy_month_of_Ramadan_ L2 - http://www.tandfonline.com/doi/full/10.1080/02640410802428097 DB - PRIME DP - Unbound Medicine ER -