EFFECTS OF A CARBOHYDRATE-, PROTEIN-, AND RIBOSE-CONTAINING REPLETION DRINK DURING 8 WEEKS OF ENDURANCE TRAINING ON AEROBIC CAPACITY, ENDURANCE PERFORMANCE, AND BODY COMPOSITION
Abbreviated Journal Title
J. Strength Cond. Res.
carbohydrate-protein drink; recovery; glycogen resynthesis; nutritional; supplement; athletic performance; MYOADENYLATE DEAMINASE DEFICIENCY; MUSCLE GLYCOGEN; SKELETAL-MUSCLE; DIFFERENCE SCORES; EXERCISE; RECOVERY; METABOLISM; HUMANS; SUPPLEMENTATION; INCREASE; Sport Sciences
Cramer, JT, Housh, TJ, Johnson, GO, Coburn, JW, and Stout, JR. Effects of a carbohydrate-, protein-, and ribose-containing repletion drink during 8 weeks of endurance training on aerobic capacity, endurance performance, and body composition. J Strength Cond Res 26(8): 2234-2242, 2012-This study compared a carbohydrate-, protein-, and ribose-containing repletion drink vs. carbohydrates alone during 8 weeks of aerobic training. Thirty-two men (age, mean +/- SD = 23 +/- 3 years) performed tests for aerobic capacity ((V) over dotO(2)peak), time to exhaustion (TTE) at 90% (V) over dotO(2)peak, and percent body fat (%fat), and fat-free mass (FFM). Testing was conducted at pre-training (PRE), mid-training at 3 weeks (MID3), mid-training at 6 weeks (MID6), and post-training (POST). Cycle ergometry training was performed at 70% (V) over dotO(2)peak for 1 hours per day, 5 days per week for 8 weeks. Participants were assigned to a test drink (TEST; 370 kcal, 76 g carbohydrate, 14 g protein, 2.2 g d-ribose; n = 15) or control drink (CON; 370 kcal, 93 g carbohydrate; n = 17) ingested immediately after training. Body weight (BW; 1.8% decrease CON; 1.3% decrease TEST from PRE to POST), %fat (5.5% decrease CON; 3.9% decrease TEST), and FFM (0.1% decrease CON; 0.6% decrease TEST) decreased (p <= 0.05), whereas (V) over dotO(2)peak (19.1% increase CON; 15.8% increase TEST) and TTE (239.1% increase CON; 377.3% increase TEST) increased (p <= 0.05) throughout the 8 weeks of training. Percent decreases in %fat from PRE to MID3 and percent increases in FFM from PRE to MID3 and MID6 were greater (p <= 0.05) for TEST than CON. Overall, even though the TEST drink did not augment BW, (V) over dotO(2)peak, or TTE beyond carbohydrates alone, it did improve body composition (%fat and FFM) within the first 3-6 weeks of supplementation, which may be helpful for practitioners to understand how carbohydrate-protein recovery drinks can and cannot improve performance in their athletes.
Journal of Strength and Conditioning Research
"EFFECTS OF A CARBOHYDRATE-, PROTEIN-, AND RIBOSE-CONTAINING REPLETION DRINK DURING 8 WEEKS OF ENDURANCE TRAINING ON AEROBIC CAPACITY, ENDURANCE PERFORMANCE, AND BODY COMPOSITION" (2012). Faculty Bibliography 2010s. 2449.