why do muscle atrophy solely from the lack of exercise or activity?


So muscles grow bigger because they break during training and then those small fractures are filled by protein? SO if I stop excersising but still keep good diet and still have some sort of movement (every day activities) why does muscle not just keep it’s size by taking nutrients from my food, what makes it shrink?

In: 5

If it shrinks thats because its readjusting from the amount of activity you were getting to what you’re getting now. It wont inginitely grow smaller

Biologist here

The body is nothing but efficient. It will use energy to build up muscles we use often, but as soon as it gets the chance, it will consume that energy to be used somewhere else.

Muscle mass is lost by inactivity, because the body wants to use every possible source of energy as efficiently as it can