posted on Mar, 2 2004 @ 10:01 PM
The effects of 8 weeks of creatine monohydrate and glutamine supplementation on body composition and performance measures.
Lehmkuhl M, Malone M, Justice B, Trone G, Pistilli E, Vinci D, Haff EE, Kilgore JL, Haff GG.
Department of Nutrition and Food Science, Auburn University, Auburn, AL 36849, USA.
Twenty-nine (17 men, 12 women) collegiate track and field athletes were randomly divided into a creatine monohydrate (CM, n = 10) group, creatine
monohydrate and glutamine (CG, n = 10) group, or placebo (P, n = 9) group. The CM group received 0.3 g creatine.kg body mass per day for 1 week,
followed by 0.03 g creatine.kg body mass per day for 7 weeks. The CG group received the same creatine dosage scheme as the CM group plus 4 g
glutamine.day(-1). All 3 treatment groups participated in an identical periodized strength and conditioning program during preseason training. Body
composition, vertical jump, and cycle performances were tested before (T1) and after (T2) the 8-week supplementation period. Body mass and lean body
mass (LBM) increased at a greater rate for the CM and CG groups, compared with the P treatment. Additionally, the CM and CG groups exhibited
significantly greater improvement in initial rate of power production, compared with the placebo treatment. These results suggest CM and CG
significantly increase body mass, LBM, and initial rate of power production during multiple cycle ergometer bouts.
Effects of in-season (5 weeks) creatine and pyruvate supplementation on anaerobic performance and body composition in American football players.
Stone MH, Sanborn K, Smith LL, O'Bryant HS, Hoke T, Utter AC, Johnson RL, Boros R, Hruby J, Pierce KC, Stone ME, Garner B.
Exercise Science Department, Appalachian State University, Boone, NC 28608, USA.
The purpose of this investigation was to study the efficacy of two dietary supplements on measures of body mass, body composition, and performance in
42 American football players. Group CM (n = 9) received creatine monohydrate, Group P (n = 11) received calcium pyruvate, Group COM (n = 11) received
a combination of calcium pyruvate (60%) and creatine (40%), and Group PL received a placebo. Tests were performed before (T1) and after (T2) the 50
week supplementation period, during which the subjects continued their normal training schedules. Compared to P and PL, CM and COM showed
significantly greater increases for body mass, lean body mass, 1 repetition maximum (RM) bench press, combined 1 RM squat and bench press, and static
vertical jump (SVJ) power output. Peak rate of force development for SVJ was significantly greater for CM compared to P and PL. Creatine and the
combination supplement enhanced training adaptations associated with body mass/composition, maximum strength, and SVJ; however, pyruvate
supplementation alone was ineffective.
[Edited on 2-3-2004 by Shoktek]