exertional fatigue

I'm used to my normal healthy body from before working in a way in which when I am exerting muscle effort, like holding something, instead of gradually failing, doing the shaking thing, muscles just fail outright. I never noticed this until recently, but since I did it's really remarkable...

Abstract: Exertional fatigue, defined as the overwhelming and debilitating sense of sustained exhaustion that impacts the ability to perform activities of daily living, is highly prevalent in chronic kidney disease (CKD) and end-stage renal disease (ESRD). Subjective reports of exertional...