I haven't measured in a while and I don't feel "weak" per se, but I did notice in the mirror that my left bicep seems to be smaller than I remembered (and that's an area that I don't really have any fat buildup which might just be disappearing due to weight or water loss). I also haven't been doing any workouts (intentionally, just to see what happens on GLP-1 meds) but I suspect just some simple workouts would help. For me right now, after ~4mo it's not enough to concern me more than just "ah, guess I should find the weights some time" but I am keeping an eye on it. Otherwise I haven't noticed anything else so it may not be related or might just be me being paranoid