Document Type

Thesis - University Access Only

Award Date


Degree Name

Master of Science (MS)

Department / School

Health, Physical Education, and Recreation

First Advisor

Matthew Vukovich


The purpose of this study was to determine the effects of high protein intake on strength adaptations, maximal oxygen consumption, and body composition during a 6- month strength and conditioning program. Fifty-one subjects [ males (n=28) and females (n=23)] 18-25 years of age were randomly assigned to receive a protein supplementation (PRO; 42g protein, 24g carbohydrate, 2g fat; Myoplex, EAS, Inc.) or a carbohydrate drink (PL; 70g carbohydrate) of equal caloric and micronutrient value twice daily. Subjects were active, healthy, but untrained individuals (/wk of exercise). Exercise training consisted of alternating days of resistance training and running. Resistance training involved 2 sets of 10 reps followed by 1 set to failure at 60% of their 1 RM on ten difference exercises. Running consisted of 45 minutes at 65% - 85% HRmax. Three-day diet records, without supplements, indicated no difference in caloric intake between groups over time (PL: OM, 2105 ± 146; 3M, 2289 ± 144; 6M, 2129 ± 158 kcals; PRO: OM, 2103 ± 137; 3M, 1946 ± 137, 6M, 2198 ± 123 kcals). Protein intake including supplements was twice as great for the PRO group (2.2 g/kg body weight) vs. the PL group ( 1.1 g/kg body weight). There was a significant time effect for all body composition variables. From baseline to 6M, PL experienced an increase in body weight (P=0.09) and FFM (P=0.03) and a decrease in percent body fat (P

Library of Congress Subject Headings

Proteins in human nutrition.
Dietary supplements.
Isometric exercise -- Physiological aspects.
Physical education and training.


South Dakota State University



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