Originally Posted by
YMCA
Yes, but he must keep doing what got him there.
IOW - he'll need to keep up the hours, otherwise lose all the benefits he spent a year gaining.
I'm not sure if I completely agree... yes he'll lose a lot of it, but some of those adaptations will stick around. Fewer long days may result in the same fitness I think, and there is something to be said for that.
You are 100% correct that if he wants to continue building, he needs to keep the volume high.