Dr. Gabrielle Lyon

Within seven days, you could lose, if you're young and healthy, two pounds of skeletal muscle mass.

I would give you, you'll lose strength and then mass.

You will lose it rapidly.

Seven days of bed rest, you will lose it.

But it will return if you've been well-trained.

That is an interesting question.

Perspective, yes.

If you are well-trained, will it return?

Yes.

It also depends on how long you have been untrained for.

It also will depend on how highly catabolic you are.

For example, if someone had cancer, they're in a highly catabolic state, their body is breaking down.

Skeletal muscle mass will improve their survivability.

If someone goes on bed rest, you will lose muscle mass and strength extremely rapidly.

Now, will you able to re-return insulin sensitivity?

Yes.

If you decided to just begin basic activities of living and not exercising, you will not be able to recover that muscle.

Getting out of the hospital, just doing basic things will not be enough.

And now, as you can imagine, that happens to people.

One thing that we didn't talk about is how skeletal muscle mass functions as an endocrine organ.