Muscle: Why Your Body Fights to Keep It
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Muscle: Why Your Body Fights to Keep It
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Muscle looks like a system for movement. But biologically, it does far more than move your skeleton.
Skeletal muscle stores fuel, helps regulate blood glucose, responds to hormones, adapts to mechanical stress, communicates with other tissues, and becomes increasingly important as we age.
In Episode 6 of Inside Your Biology, we investigate how muscle is built, maintained, used, and lost.
What actually happens inside a muscle after resistance training? Why does protein matter? What is muscle protein synthesis? Why do strength and muscle mass decline with age? Can inactivity cause meaningful muscle loss surprisingly quickly? And does having more muscle really improve metabolic health?
We explore muscle fibers, motor units, mechanical tension, satellite cells, protein turnover, amino acids, insulin sensitivity, glycogen, myokines, resistance training, recovery, aging, sarcopenia, and the difference between muscle size and muscle strength.
The deeper question is:
Why does the body invest so much energy in maintaining muscle and what happens when that tissue begins to disappear?
Inside Your Biology — The science of what’s happening inside you.