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To optimize recovery for endurance athletes performing multiple bouts of prolonged activity, post-exercise supplementation should aim to restore muscle glycogen and attenuate muscle damage. Post-exercise carbohydrate-protein (CHO+PRO) supplementation has shown to alter the phosphorylation of signaling protein related to PRO synthesis, but the effects when compared to CHO only in an endurance exercise model have not been well characterized.
A recent study in the Journal of Strength and Conditioning Research sought to compare the effects of a CHO+PRO supplement (low-fat chocolate milk), an isocaloric CHO, and a placebo (PLA) on recovery and subsequent endurance exercise performance. The study’s design was a randomized, double-blind, PLA-controlled, crossover with 10 healthy, trained cyclists and triathletes (N = 10; 5 men, 5 women).
Each participant completed an exercise protocol with multiple blood samples drawn to monitor indicators of muscle damage and inflammation, and muscle biopsies were performed to assess muscle glycogen resynthesis. Immediately post-exercise, three experimental beverages (low-fat chocolate milk, CHO-only, or PLA) were provided, with each participant acting as their own control for each treatment.
The study found that the trial time was faster in CHO+PRO than in CHO and PLA (79.43 ± 2.11 vs. 85.74 ± 3.44 and 86.92 ± 3.28 min, p ≤ 0.05) and muscle glycogen resynthesis was higher in CHO+PRO and CHO than in PLA (23.58 and 30.58 vs. 7.05 µmol-g-1 wet weight, p ≤ 0.05).
Thus, this study suggests that chocolate milk (CHO+PRO) can improve subsequent exercise performance, and can provide a greater signaling stimulus for PRO synthesis as compared to CHO-only supplements.
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The Journal of Strength and Conditioning Research is the NSCA's scientific journal. This monthly publication prints original research information important to strength and conditioning practitioners. Many educational institutions, researchers, and professionals retain this journal as a valuable reference.
Love it! Thanks for visiting this topic. It's "out there" but clients often wonder about the details and non-fat, low-fat or full-fat while also hearing about much greater need for protein after and confused by data as they
more» "recall" it. More evidence-based information helps trainers relay this info succinctly and prepare clients with an optimal recommendation based on credible sources. www.voiceforfitness.com«less