Fluid-electrolyte balance associated with tennis match play in a hot environment

M. F. Bergeron, C. M. Maresh, L. E. Armstrong, J. F. Signorile, J. W. Castellani, R. W. Kenefick, K. E. LaGasse, D. A. Riebe

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


Twenty (12 male and 8 female) tennis players from two Division I university tennis teams performed three days of round-robin tournament play (i.e., two singles tennis matches followed by one doubles match per day) in a hot environment (32.2 ± 1.5°C and 53.9 ± 2.4% rh at 1200 hr), so that fluid-electrolyte balance could be evaluated. During singles play, body weight percentage changes were minimal and were similar for males and females (males -1.3 ± 0.8%, females -0.7 ± 0.8%). Estimated daily losses (mmol · day-1) of sweat sodium (Na+) and potassium (K+) (males, Na+ 158.7, K+ 31.3: females, Na+ 86.5, K+ 18.9) were met by the players' daily dietary intakes (mmol · day-1) of these electrolytes (males, Na+ 279.1 ± 109.4, K+ 173.5 ± 57.7; females, Na+ 178.9 ± 68.9, K+ 116.1 ± 37.5). Daily plasma volume and electrolyte (Na+, K+) levels were genera1ly conserved, although, plasma [Na+] was lower (p < .05) on the morning of Day 4. This study indicated that these athletes generally maintained overall fluid-electrolyte balance, in response to playing multiple tennis matches on 3 successive days in a hot environment, without the occurrence of heat illness.

Original languageEnglish (US)
Pages (from-to)180-193
Number of pages14
JournalInternational Journal of Sport Nutrition
Issue number3
StatePublished - 1995
Externally publishedYes


  • aldosterone
  • heat
  • plasma osmolality
  • potassium
  • sodium
  • sweat
  • urine specific gravity

ASJC Scopus subject areas

  • Food Science
  • Endocrinology
  • Medicine (miscellaneous)
  • Public Health, Environmental and Occupational Health


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