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Showing posts with label muscle loading. Show all posts
Showing posts with label muscle loading. Show all posts

Muscle Tension Promotes Protein Synthesis

Muscle tension and time under tension are critical for muscle pro­tein synthesis and increases in mus­cle mass and strength. Skeletal mus­cle is a highly-reactive tissue that increases in size in response to over­load, such as strength training, and atrophies in response to inactivity.

muscle tension

Researchers from the University of Maryland, in a review of literature, summarized the effects of muscle tension and training load on muscle protein synthesis. Mechanical loading (weight training) turns on muscle protein synthesis by activating the mTOR-signaling path­way. Muscle tension also increases the movement of amino acids into muscle cells, which form the build­ing blocks for making new muscle tissue. Muscle tension also activates muscle growth factors, such as IGF-1 to stimulate protein synthesis. Sensors in the muscle cell mem­branes detect muscle loading, which trigger chemical pathways that make new muscle protein.

Muscle tension, along with the availability of key amino acids and other nutrients and hormones, are key ingredients for promoting mus­cle growth.

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