The effect of whey protein supplementation with and without creatine monohydrate combined with resistance training on lean tissue mass and muscle strength
Dg. Burke et al., The effect of whey protein supplementation with and without creatine monohydrate combined with resistance training on lean tissue mass and muscle strength, INT J SP N, 11(3), 2001, pp. 349-364
Citations number
35
Categorie Soggetti
Ortopedics, Rehabilitation & Sport Medicine
Journal title
INTERNATIONAL JOURNAL OF SPORT NUTRITION AND EXERCISE METABOLISM
Our purpose was to assess muscular adaptations during 6 weeks of resistance
training in 36 males randomly assigned to supplementation with whey protei
n (W; 1.2 g/kg/day), whey protein and creatine monohydrate (WC, 0.1 g/kg/da
y), or placebo (P; 1.2 g/kg/day maltodextrin). Measures included lean tissu
e mass by dual energy x-ray absorptiometry, bench press and squat strength
(1-repetition maximum), and knee extension/flexion peak torque. Lean tissue
mass increased to a greater extent with training in WC compared to the oth
er groups, and in the W compared to the P group (p < .05). Bench press stre
ngth increased to a greater extent for WC compared to W and P (p < .05). Kn
ee extension peak torque increased with training for WC and W (p < .05), bu
t not for P. All other measures increased to a similar extent across groups
. Continued training without supplementation for an additional 6 weeks resu
lted in maintenance of strength and lean tissue mass in all groups. Males t
hat supplemented with whey protein while resistance training demonstrated g
reater improvement in knee extension peak torque and lean tissue mass than
males engaged in training alone. Males that supplemented with a combination
of whey protein and creatine had greater increases in lean tissue mass and
bench press than those who supplemented with only whey protein or placebo.
However, not all strength measures were improved with supplementation, sin
ce subjects who supplemented with creatine and/or whey protein had similar
increases in squat strength and knee flexion peak torque compared to subjec
ts who received placebo.