Award Date


Degree Type


Degree Name

Master of Science (MS)



First Committee Member

John C. Young

Number of Pages



The purpose of this study was to evaluate the efficacy of adding leucine to pre and post-exercise carbohydrate beverages on blood markers of muscle damage, muscle soreness, and squat performance. Eighteen resistance-trained subjects performed 6 sets of squats to fatigue using 75% of the 1-RM with 3 minutes rest between sets. Subjects consumed a carbohydrate beverage (.25 g/kg) 30 minutes before and immediately after exercise with or without the addition of leucine (45 mg/kg) in randomized, double-blind fashion. Creatine kinase (CK), lactate dehydrogenase (LDH), and subjective surveys of muscle soreness, were analyzed before, 24 hrs, 48 hrs, and 72 hrs after exercise. Subjects repeated the squat protocol 72 hrs after the initial bout to test short-term recovery. The addition of leucine did not significantly decrease CK and LDH activity or soreness at 24, 48, or 72 hrs post-exercise. No differences were noted in repetitions performed between groups during the initial bout or 72 hrs post-exercise. This study suggests that the addition of leucine to carbohydrate beverages does not enhance recovery in resistance-trained subjects.


Alone; Carbohydrate; Damage; Delayed; Leucine; Muscle; Onset; Performance; Resistance; Skeletal; Soreness; Training

Controlled Subject

Physical therapy; Nutrition; Kinesiology

File Format


File Size

1802.24 KB

Degree Grantor

University of Nevada, Las Vegas




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