this is an interesting topic to me at least. You mention two things actually: muscle WASTING and muscle WEAKNESS. In my entirely subjective and anecdotal view the two are quite different, Wasting may be entirely a consequence of less activity. In the early years of my Dx I lost muscle tone and added fat weight, my lifestyle just slowed down. Muscle weakness IMO is definitely a PD symptom as in reduced motor skill and specific movement,

So for example I lift weight and exercise and have added muscle weight and lost fat weight. By most measures at my age of 60 I would be considered fit and strong. But I can struggle with opening a jar lid or tearing open a package as if i have lost strength.

So IMO perhaps you may do well to distinguish between the two and be more specific with the characteristics you are experiencing. Best advice i have ever received is to "stay active"

just my two cents