Training for Strength and Endurance Does Not Interfere With Muscle Protein Synthesis

Concurrently training for strength and endurance does not interfere with muscle protein synthesis in untrained men— according to Swedish researchers. Two small groups of men practiced either weight training or weight training plus endurance exercise for seven weeks. Strength gains were similar in the two groups, but increases in muscle mass were greatest in the group practicing strength and endurance exercise. Endurance training did not interfere with the mTOR pathway of muscle protein synthesis. Researchers concluded that endurance training does not interfere with muscle strength or hypertrophy when combined with a weight-training program. While this was a sophisticated, well-designed study, the results cannot be extrapolated to intensely training athletes. The researchers used sedentary men with little training experience during a seven-week study. Beginners typically take many weeks to learn basic training patterns, and have not developed the neuromuscular capacity to train intensely. This study should be repeated using well-trained people or elite athletes. (PloS ONE, 11(2) e0149082, 2016)

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