Date of Award
Spring 2019
Document Type
Thesis Restricted
Degree Name
Master of Science (MS)
Department
Athletic Training – Post Professional Concentration
Committee Chairperson
Dr. Sandra Fowkes-Godek PhD, LAT, ATC
Committee Member
Dr. Katherine Morrison PhD, LAT, ATC
Committee Member
Kathryn Courtney, ABD, ATC, CSCS
Abstract
Context: Sweat rate (SwR) and sweat electrolyte (SwTE) composition are traditionally calculated/collected once in an exercise bout. The purpose of this study was to determine whether sweat collected at 30-min could accurately predict SwTE concentration at 120-min of continuous running; and if SwR at Hr1 accurately predicted SwR at Hr2, while subjects drank to thirst (Thirst) versus a generic schedule (Scheduled). Methods: Seventeen subjects (10M/7F) completed 2, 2-hr running trials at 60% of their max heart rate in a thermoneutral chamber. Scheduled followed 2000 NATA fluid replacement guidelines and Thirst drank water when they felt a deep-seated desire. SwR was calculated after each hr. Sweat samples by absorbent patch method were collected at 30-min and 90-min. 2x2 ANOVAs were used for hour, trial, and sex differences. P< .05. Results: Differences in SwR were observed between sexes (Thirst Males= 1.17+/- 0.39, Thirst Females= 0.75+/-0.21, Scheduled Males= 1.17+/-0.32, Scheduled Females= 0.86+/- 0.21, P= .01). SwTNa+ was different between Hr1(47.4+/-22.0mmol/l) and Hr2(51.9+/-22.7mmol/l) (P=0.004). SwtCl- was different between Hr1(38.60+/-20.50mmol/l) and Hr2(43.24+/-43.24mmol/l) (P=0.02). Body weight changes were observed between sexes (Thirst Males= -1.84+/-0.80, Thirst Females = -1.18+/-0.33, Scheduled Males= 0.45+/-0.75, Scheduled Females= 0.77+/-0.47, P=
Recommended Citation
Hunt, Danielle, "A Comparison of Sweat Rate and Sweat Electrolyte Concentrations Between the First and Second Hours of Running While Using Two Different Hydration Methods." (2019). West Chester University Master’s Theses. 1.
https://digitalcommons.wcupa.edu/all_theses/1