Date of Award
Master of Science (MS)
Dan Benardot, PhD, RD, LD, FACSM
Mildred Cody, PhD, RD, LD
Walter Thompson, PhD, FACSM
Purpose: To investigate the differential effects of solutions providing varying concentrations of carbohydrate and/or protein ingested between 200-meter sprints on sprint time. Subjects: Recruitment was from the Georgia State University track and field team. Methods: The study protocol was approved by the Georgia State University IRB. Ten subjects, 18 to 21 years of age, consented to be included in the study. Nine subjects (7 females; 2 males) completed trial 1, six subjects (5 females; 1 male) completed trial 2, and three subjects (2 females; 1 male) completed the final trial. Each trial consisted of a 200-meter sprint followed by the immediate ingestion of a post-exercise recovery beverage within the first fifteen minutes of a one-hour recovery period. Following the one-hour of recovery, subjects sprinted a second 200-meter sprint. Beverage solutions were formulated to contain 1.2 g of protein (PRO), 1.2 g carbohydrate (CHO), or 1.2 g carbohydrate with protein (CHO/PRO) per kg of subject body weight. Using a single blind, non-randomized design, subjects received the same recovery beverage in each trial. Each trial consisted of either PRO (trial 1), CHO (trial 2), or CHO/PRO (trial 3), with one week separating trials. Sprint times were recorded in seconds and ten hundredths of a second using a manual, digital stopwatch. Results: During PRO, two subjects sprinted faster (x= -.25 sec), three subjects saw no change in sprint time, and four subjects sprinted slower (x= +.98 sec). During CHO, two female subjects sprinted faster between sprints (x= -.85 sec); and all other subjects (n=4) sprinted slower (x= +.73 sec). During CHO/PRO, no subjects sprinted faster from sprint 1 to sprint 2 (x= +.33 sec) Conclusions: Post-exercise nutritional supplementation effects varied among subjects, with some subjects performing better following PRO, while others experiencing improvements with CHO. In general, subjects performed better following consumption of the CHO beverage. Of those who ran faster between sprints, the CHO beverage resulted in an average improvement of -.85 sec, while the PRO beverage resulted in an average improvement of -.25 sec. On average, CHO resulted in faster 2nd sprints (x= +.20 sec) than the PRO beverage (x= +.47 sec) or the CHO/PRO beverage (x= +.33 sec). Continued research in this population is necessary for elucidation of study results. This investigation may serve as the foundation for future, related studies.
Vance, Denice A., "The Effects of Carbohydrate, Protein, and Carbohydrate with Protein Solutions on 200-Meter Sprint Speed." Thesis, Georgia State University, 2010.