Graduate Program

Kinesiology and Sports Studies

Degree Name

Master of Science (MS)

Semester of Degree Completion

2012

Thesis Director

Brian L. Pritschet

Thesis Committee Member

Phyllis T. Croisant

Thesis Committee Member

John D. (Jake) Emmett

Abstract

Research has suggested that orally rinsing with a carbohydrate solution can improve shorter-endurance exercise performance (Carter, Jeukendrup, & Jones, 2004; Chambers, Bridge, & Jones, 2009; Pottier, Bouckaert, Roels, & Derave, 2009; Rollo, Williams, & Nevill, 2011). The purpose of this study was to determine if a carbohydrate mouth rinse improves a 30 minute running distance compared to a non-carbohydrate mouth rinse in females ages 18 to 25 years. Eight female recreational runners performed two experimental rinse-trials the morning after an overnight fast. Participants performed each 30 minute treadmill run at a Borg rating of perceived exertion (RPE) of 14 and rinsed their mouths with either a 6.4% carbohydrate solution (CHO) or a placebo solution (PLA) for ten seconds every five minutes. RPE and heart rate (HR) were recorded every five minutes. Participants were instructed to manually adjust the treadmill speed to maintain an RPE of 14. There was no significant difference (p=0.20) in mean RPE between the CHO and PLA trials (13.44±2.98 versus 13.69±1.61). Distance ran in 30 minutes was not significantly different (p=0.55) between the CHO and PLA experimental trials (2.81±0.43 miles versus 2.84±0.43 miles). In accordance, no significant difference (p=0.06) in HR (157.56±19.31 bpm versus 164.43±20.56 bpm) was observed between the CHO and PLA trials. Orally rinsing with a 6.4% carbohydrate solution did not improve the level of perceived effort during a 30 minute treadmill running distance in females of ages 18 to 25 when running at a somewhat hard to hard intensity.

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