Anyone else's muscles just fail immediately instead of gradually?

[MrMagoo]

I lose power abruptly at times. I also lose it when resting doing nothing so it’s unnoticeable but if you knocked at my door I couldn’t get up to answer.

 

[Midnattsol]

I lose power abruptly at times. I also lose it when resting doing nothing so it’s unnoticeable but if you knocked at my door I couldn’t get up to answer.

I can at times feel perfectly fine sitting down, then get up and realize I’m not able to walk.. it’s very weird.

 

[duncan]

I object that the problem hasn't been proven to be in the muscles. It could be in the controlling systems for the muscles. There seems to have been plenty of studies looking for signs of physical problems in muscles of PWME, but none that I know of have shown anything significant. If your arm muscles can lift 20 kg, and then suddenly stops being able to lift even 1 kg, it should be fairly easy to find physical signs of the cause ... if it is actually in the muscles. If you can't find it there, then logically, the problem is elsewhere.

Yep. Or the problem is there, just lurking in crappy testing protocols.