title: The effect of acute fluid consumption following exercise-induced fluid loss on hydration status, percent body fat, and minimum wrestling weight in wrestlers.
abstract: Acute fluid consumption (approximately 1 L) has been shown to reduce urine specific gravity (Usg) among subjects after an overnight fast, yet it is unknown if Usg may be reduced among subjects who have experienced exercise-induced fluid loss. The purpose of this study was to examine the effect of acute fluid consumption on Usg, body mass, percent body fat (%BF), and minimum wrestling weight (MWW) following an exercise-induced fluid loss protocol. National Collegiate Athletic Association coaches' perceptions of the weight certification program (WCP) were also evaluated. Twelve men wrestlers (19.8 ± 1.14 years) were tested prepractice (PRE), postpractice (POST), and 1 hour after consuming 1 L of water (PFC). Percent body fat was measured by skinfolds (SF), air displacement plethysmography (ADP), and multifrequency and leg-to-leg bioelectrical impedance analysis to calculate MWW. Urine specific gravity measurements significantly increased above PRE (1.013 ± 0.006) at the POST (1.019 ± 0.007; p = 0.017) and PFC (1.022 ± 0.008; p = 0.025) assessments; however, POST and PFC were not significantly different (p = 0.978) from one another. The %BF values were similar (p > 0.05) at each assessment point when using SF and ADP. When compared with PRE, MWW significantly reduced at the POST assessment when using SF (67.2 ± 8.4 vs. 65.7 ± 8.2 kg; p < 0.001) and ADP (66.6 ± 9.1 vs. 64.8 ± 9.0 kg; p = 0.001), reflecting the reduction in body mass observed after exercise. Forty-seven National Collegiate Athletic Association coaches completed the questionnaire and 2 central themes emerged: (a) concerns with the 1.5% weight loss plan and (b) wrestlers using strategies in an attempt to circumvent the WCP. Exercise-induced fluid loss followed by acute fluid consumption equal to 1 L was ineffective in reducing Usg.
authors.affiliation: 1Department of Exercise Science and Sport, The University of Scranton, Scranton, Pennsylvania; and 2Health Science Department, Lock Haven University, Lock Haven, Pennsylvania.
authors.forename: Paul T
authors.initials: PT
authors.lastname: Cutrufello
authors.forename: Curt B
authors.initials: CB
authors.lastname: Dixon
mesh_terms: D050154:Adiposity / Q000502:physiology*; D000293:Adolescent; D001835:Body Weight / Q000502:physiology*; D004326:Drinking / Q000502:physiology; D017097:Electric Impedance; D015444:Exercise / Q000502:physiology*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D010991:Plethysmography; D012885:Skinfold Thickness; D013046:Specific Gravity; D011795:Surveys and Questionnaires; D016482:Urinalysis; D014867:Water / Q000502:physiology*; D014952:Wrestling / Q000145:classification / Q000502:physiology*; D055815:Young Adult
chemical_list: D014867:Water