Rehydration with drinks differing in sodium concentration and recovery from moderate exercise-induced hypohydration in man.

Stuart J Merson, Ronald J Maughan, Susan M Shirreffs

Journal: European journal of applied physiology 2008;103(5):585-94

PMID: 18463891

Abstract

To investigate how differing moderate sodium chloride concentrations affect rehydration after exercise and subsequent exercise capacity, eight males lost 1.98 +/- 0.1% body mass exercising in the heat, then consumed one of four drinks in a volume equivalent to 150% of mass loss. Drinks were identical except for sodium chloride content (1 +/- 1, 31 +/- 1, 40 +/- 1, 50 +/- 1 mmol/l). After 4 h recovery subjects cycled for 5 min at 70% VO(2peak) then at 95% VO(2peak) until volitional fatigue. Urine output was inversely related to sodium intake: more was produced with the 1 than the 40 and 50 mmol/l drinks (P < 0.01). Time to exhaustion in the exercise capacity test was not different between treatments (P = 0.883). The addition of 40 or 50 mmol/l of sodium chloride to a rehydration beverage reduced subsequent urine output, thereby providing more effective rehydration than a sodium-free drink. This did not, however, result in improved performance 4 h after the end of the rehydration period.

Address: School of Sport and Exercise Sciences, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK.

DOI: 10.1007/s00421-008-0748-0

Link outs

Free resources

Medical:

Other Literature Sources:

https://www.lens.org/lens/search/patent/list?q=ref...

Subscription / membership required

Full Text Sources:

https://dx.doi.org/10.1007/s00421-008-0748-0

MeSH Terms: Adult, Anaerobic Threshold, Beverages, Bicycling, Body Weight, Chlorides, Dehydration, Electrolytes, Exercise, Fluid Therapy, Heart Rate, Humans, Male, Osmolar Concentration, Potassium, Sodium, Water-Electrolyte Balance