If a PC has lost Agility, they can recover by resting for 4 hours and drinking a ration of water (I think, sorry I do not have the book with me).
Rotwater is commonly available, and will give 1 Rot to the drinker.
So if I drink rotwater as a ration of water, I would gain 1 point of Rot, roll for Rot trauma immediately (possibly losing Strength as a result). I could then rest for 4 hours and eat a ration to regain my Strength and Agility. I would of course at some point gain at least another point of Rot that day from passing through the Zone.
So the downside of this is that I potentially gain a lot more Rot points in a short period of time, i.e. +1/day. Good if you are a Rot-eater, not necessarily so good otherwise.