Fluid Intake and Sweat Rate During Hot Yoga Participation
Document Type
Oral Presentation
Campus where you would like to present
SURC Ballroom B/C/D
Start Date
21-5-2015
End Date
21-5-2015
Keywords
Hydration, Sweat Rate, Hot Yoga
Abstract
Purpose: To investigate the pre-exercise hydration status, fluid balance, perception of sweat loss, and sweat sodium loss in hot yoga participants. Methods: Male and female participants, n = 21, 33 ± 10.5 yr, 173.1 cm, mass: 70.7 ± 11.0 kg, were examined during a one-hour hot hatha yoga class, 38.7 ± 2.6°C, 36 ± 13 percent relative humidity. Urine specific gravity (USG) was measured to assess pre-exercise hydration status. Sweat rate was calculated using pre and post-session weight and fluid intake. Sweat sodium concentration was analyzed via a sweat patch sample. After the hot yoga session, participants were asked to fill an empty one liter container with the amount of water with which they perceived they lost as sweat during the class. A paired t test was used to identify significance between measured sweat loss and perceived sweat loss and Pearson’s correlation analyses were used to assess any relationship between selected variables, p≤0.05. Results: Seventy-six percent of participants began hot yoga euhydrated, USG<1.020. Sweat rate was 0.9 ± 0.6 L·h-1, and despite free access to fluids during class, consumption was low (0.2 ± 0.2 L·h-1), and 33 percent did not consume any fluids. Consequently, mean percent body mass loss was 0.9 ± 0.6 percent from pre-exercise body mass, and about half of the participants lost at least one percent of body mass. There was a significant difference between perception of sweat loss and measured loss, p=0.01. Mean sweat sodium concentration was 49.1 ± 19.2 mmol·L-1. Conclusion: These findings highlight the individual variability in hydration management among hot yoga participants. Therefore, a need for personalized hydration guidelines and individual education is warranted to prevent hypohydration.
Recommended Citation
Stalder, Amanda; Campbell, Stephanie; and Pritchett, Kelly, "Fluid Intake and Sweat Rate During Hot Yoga Participation" (2015). Symposium Of University Research and Creative Expression (SOURCE). 82.
https://digitalcommons.cwu.edu/source/2015/posters/82
Poster Number
28
Department/Program
Nutrition, Exercise & Health Science
Additional Mentoring Department
Nutrition, Exercise & Health Science
Fluid Intake and Sweat Rate During Hot Yoga Participation
SURC Ballroom B/C/D
Purpose: To investigate the pre-exercise hydration status, fluid balance, perception of sweat loss, and sweat sodium loss in hot yoga participants. Methods: Male and female participants, n = 21, 33 ± 10.5 yr, 173.1 cm, mass: 70.7 ± 11.0 kg, were examined during a one-hour hot hatha yoga class, 38.7 ± 2.6°C, 36 ± 13 percent relative humidity. Urine specific gravity (USG) was measured to assess pre-exercise hydration status. Sweat rate was calculated using pre and post-session weight and fluid intake. Sweat sodium concentration was analyzed via a sweat patch sample. After the hot yoga session, participants were asked to fill an empty one liter container with the amount of water with which they perceived they lost as sweat during the class. A paired t test was used to identify significance between measured sweat loss and perceived sweat loss and Pearson’s correlation analyses were used to assess any relationship between selected variables, p≤0.05. Results: Seventy-six percent of participants began hot yoga euhydrated, USG<1.020. Sweat rate was 0.9 ± 0.6 L·h-1, and despite free access to fluids during class, consumption was low (0.2 ± 0.2 L·h-1), and 33 percent did not consume any fluids. Consequently, mean percent body mass loss was 0.9 ± 0.6 percent from pre-exercise body mass, and about half of the participants lost at least one percent of body mass. There was a significant difference between perception of sweat loss and measured loss, p=0.01. Mean sweat sodium concentration was 49.1 ± 19.2 mmol·L-1. Conclusion: These findings highlight the individual variability in hydration management among hot yoga participants. Therefore, a need for personalized hydration guidelines and individual education is warranted to prevent hypohydration.
Faculty Mentor(s)
Robert Pritchett