Interesting study that was recently published:
ABSTRACT
Background: Acute consumption of fat-free fluid milk after resistance
exercise promotes a greater positive protein balance than does
soy protein.
Objective: We aimed to determine the long-term consequences of
milk or soy protein or equivalent energy consumption on traininginduced
lean mass accretion.
Design: We recruited 56 healthy young men who trained 5 d/wk for
12 wk on a rotating split-body resistance exercise program in a
parallel 3-group longitudinal design. Subjects were randomly assigned
to consume drinks immediately and again 1 h after exercise:
fat-free milk (Milk; n 18); fat-free soy protein (Soy; n 19) that
was isoenergetic, isonitrogenous, and macronutrient ratio matched
to Milk; or maltodextrin that was isoenergetic with Milk and Soy
(control group; n 19).
Results: Muscle fiber size, maximal strength, and body composition
by dual-energy X-ray absorptiometry (DXA) were measured before
and after training. No between-group differences were seen in
strength. Type II muscle fiber area increased in all groups with
training, but with greater increases in the Milk group than in both the
Soy and control groups (P 0.05). Type I muscle fiber area increased
after training only in the Milk and Soy groups, with the
increase in the Milk group being greater than that in the control group
(P0.05). DXA-measured fat- and bone-free mass increased in all
groups, with a greater increase in the Milk group than in both the Soy
and control groups (P 0.05).
Conclusion:Weconclude that chronic postexercise consumption of
milk promotes greater hypertrophy during the early stages of resistance
training in novice weightlifters when compared with isoenergetic
soy or carbohydrate consumption. Am J Clin Nutr 2007;
86:373- 81.
ABSTRACT
Background: Acute consumption of fat-free fluid milk after resistance
exercise promotes a greater positive protein balance than does
soy protein.
Objective: We aimed to determine the long-term consequences of
milk or soy protein or equivalent energy consumption on traininginduced
lean mass accretion.
Design: We recruited 56 healthy young men who trained 5 d/wk for
12 wk on a rotating split-body resistance exercise program in a
parallel 3-group longitudinal design. Subjects were randomly assigned
to consume drinks immediately and again 1 h after exercise:
fat-free milk (Milk; n 18); fat-free soy protein (Soy; n 19) that
was isoenergetic, isonitrogenous, and macronutrient ratio matched
to Milk; or maltodextrin that was isoenergetic with Milk and Soy
(control group; n 19).
Results: Muscle fiber size, maximal strength, and body composition
by dual-energy X-ray absorptiometry (DXA) were measured before
and after training. No between-group differences were seen in
strength. Type II muscle fiber area increased in all groups with
training, but with greater increases in the Milk group than in both the
Soy and control groups (P 0.05). Type I muscle fiber area increased
after training only in the Milk and Soy groups, with the
increase in the Milk group being greater than that in the control group
(P0.05). DXA-measured fat- and bone-free mass increased in all
groups, with a greater increase in the Milk group than in both the Soy
and control groups (P 0.05).
Conclusion:Weconclude that chronic postexercise consumption of
milk promotes greater hypertrophy during the early stages of resistance
training in novice weightlifters when compared with isoenergetic
soy or carbohydrate consumption. Am J Clin Nutr 2007;
86:373- 81.
