[jki275]

As someone who regularly fasts for a variety of reasons, I would agree -- it's nearly impossible to gain muscle while fasting anyway, and without working out in any way I can't imagine how that could happen at all.

But most likely the tool is measuring inaccurately.

[sridca]

> it's nearly impossible to gain muscle while fasting anyway

Fasting may not affect muscle gain during the fast, but it may during the following refeed.

[jki275]

I'm sure that's possible -- I've never experienced it. Perhaps if I were more disciplined about recovery.