Electrolyte supplementation during severe energy restriction increases exercise capacity in the heat

European Journal of Applied Physiology
Lewis J JamesSusan M Shirreffs

Abstract

This study examined the effects of sodium chloride and potassium chloride supplementation during 48-h severe energy restriction on exercise capacity in the heat. Nine males completed three 48-h trials: adequate energy intake (100 % requirement), adequate electrolyte intake (CON); restricted energy intake (33 % requirement), adequate electrolyte intake (ER-E); and restricted energy intake (33 % requirement), restricted electrolyte intake (ER-P). At 48 h, cycling exercise capacity at 60 % VO2 peak was determined in the heat (35.2 °C; 61.5 % relative humidity). Body mass loss during the 48 h was greater during ER-P [2.16 (0.36) kg] than ER-E [1.43 (0.47) kg; P < 0.01] and CON [0.39 (0.68) kg; P < 0.001], as well as greater during ER-E than CON (P < 0.01). Plasma volume decreased during ER-P (P < 0.001), but not ER-E or CON. Exercise capacity was greater during CON [73.6 (13.5) min] and ER-E [67.0 (17.2) min] than ER-P [56.5 (13.1) min; P < 0.01], but was not different between CON and ER-E (P = 0.237). Heart rate during exercise was lower during CON and ER-E than ER-P (P < 0.05). These results demonstrate that supplementation of sodium chloride and potassium chloride during energy restriction attenuated the reduction in exercise ca...Continue Reading

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Citations

Feb 28, 2018·European Journal of Sport Science·Mohamed Nashrudin Bin Naharudin, Ashril Yusof
Mar 21, 2018·Journal of the International Society of Sports Nutrition·Victoria PonsAntoni Pons
May 31, 2019·International Journal of Sport Nutrition and Exercise Metabolism·Mathew HillierKaren Hind
May 27, 2020·International Journal of Sport Nutrition and Exercise Metabolism·Anita M Rivera-Brown, José R Quiñones-González
Jul 14, 2017·International Heart Journal·Yanfang WanJun Zhang
Mar 29, 2021·Resuscitation·David A ZidemanKurtis Poole
Dec 3, 2021·European Journal of Sport Science·Heloiana FaroDaniel Gomes da Silva Machado

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