Out of shape referees

What actions are in place to make sure a referee can keep up with the pace of a game?
I’ve seen plenty of local matches over the past couple of years ruined by refs you could only describe as obese and end up just hovering in the middle of the pitch cause they cant physically get up and down it.
Surely its only right to have a mandatory fitness test every couple years to make sure they can do the job, or is there something like this already in place?

There are tests in place. There just aren’t enough referees. The lower the level the more likely you are to get a less fit unfortunately.

Shame really, I’ve seen Div2 matches in both codes affected by this

Shouldn’t be happening at that level.

Surprised more ex players don’t consider giving a go. Good way of keeping fit