That's the channel, scoob!
I knew we would find it. I am not saying he's going to degrade faster, more or less comparing it to, let's say you deciding to get back into college marching band shape and tomorrow you go out and try to immediately march say.... 8 miles? (I don't know what you do for a living, or how physically active you are. Spit balling here)
It's not the "degrade faster" it's the "dear mother of every fuck ever, why am I alive today?!?!?!" the next day feeling.