2009 Student Research Conference:
22nd Annual Student Research Conference

Effects of Glycerol Versus Standard Sport Drink on Hydration
Todd M. Turner*, Katie R. Mills, and Nick J. Valdez
Dr. Alex J. Koch, Faculty Mentor

Glycerol ingestion is meant to super-hydrate the body and offset water loss during exercise. We compared ingestion of liquids containing glycerol (SG), versus standard sports drink (SC) before exercise. Five healthy young men (age = ,height = ,body mass =, VO2max ) completed two exercise bouts of 5 x 10 minute sets of stationary cycling at 50% max workload. We separated each set by five minutes. Subjects drank 500ml of SG or SC 30 min. before exercise in a randomized, double-blind protocol. We recorded nude body mass, plasma volume, and salivary osmolality following each set. Salivary osmolality was constant (p=0.847) over the duration with no difference in the pattern of change in salivary osmolality between conditions (p=0.658). Body mass dropped more with SG than SC consumption (p=0.013). Plasma volume dropped significantly over time (p<0.001), but was not different between conditions (p=0.573). Glycerol was no more effective than a standard sports drink.

Keywords: hydration, glycerol, cycling, sport, drink, osmolality, hydrate, exercise

Topic(s):Exercise Science

Presentation Type: Oral Paper

Session: 24-1
Location: VH 1000
Time: 9:45

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