2026-05-24T06:06:38Zhttps://keep.lib.asu.edu/oai/requestoai:keep.lib.asu.edu:node-1580092024-12-20T18:25:12Zoai_pmh:alloai_pmh:repo_items158009
https://hdl.handle.net/2286/R.I.56957
http://rightsstatements.org/vocab/InC/1.0/
2020
84 pages
Masters Thesis
Academic theses
Text
eng
Pelham, Emily Claire
Wardenaar, Floris
Whisner, Corrie
Levinson, Simin
Arizona State University
Masters Thesis Nutrition 2020
More than 200 hikers are rescued annually in the greater Phoenix area. This study<br/><br/>examined the impact of hiking in hot (HOT), dry temperatures versus moderate (MOD)<br/><br/>temperatures on dietary intake behaviors as well as markers of heat stress. Twelve<br/><br/>recreational mountain hikers climbed “A” Mountain four consecutive times (4-miles) on<br/><br/>a HOT day (WBGT=31.6 °C) and again on a MOD day (WBGT= 19.0 °C). Simulated<br/><br/>food and fluid behavior allowed participants to bring what they normally would for a 4-<br/><br/>mile hike and to consume both ad libitum. The following heat stress indicators (mean<br/><br/>difference; p-value), were all significantly higher on the HOT hike compared to the MOD<br/><br/>hike: average core temperature (0.6 °C; p=0.002), average rating of perceived exertion<br/><br/>(2.6; p=0.005), sweat rate (0.54; p=0.01), and fluid consumption (753; p<0.001). On the<br/><br/>HOT hike, 42% of the participants brought enough fluids to meet their individual<br/><br/>calculated fluid needs, however less than 20% actually consumed enough to meet those<br/><br/>needs. On the MOD hike, 56% of participants brought enough fluids to meet their needs,<br/><br/>but only 33% actually consumed enough to meet them. Morning-after USG samples<br/><br/>≥1.020 indicating dehydration on an individual level showed 75% of hikers after the<br/><br/>HOT hike and 67% after the MOD hike were unable to compensate for fluids lost during<br/><br/>the previous day’s hike. Furthermore, participant food intake was low with only three<br/><br/>hikers consuming food on the hot hike, an average of 33.2g of food. No food was<br/><br/>consumed on the MOD hike. These results demonstrate that hikers did not consume<br/><br/>enough fluids to meet their needs while hiking, especially in the heat. They also show<br/><br/>heat stress negatively affected hiker’s physiological and performance measures. Future<br/><br/>recommendations should address food and fluid consumption while hiking in the heat.
Nutrition
Heat
Hikers
hiking
Hot
Hydration
Sport
Dietary Intake Behaviors of Recreational Mountain Hikers Climbing "A" Mountain in Summer and Fall