I had to laugh; most of my clients complain about aches and pains in their bodies! Do they mean this only happens when they travel? There are so many things that can cause this: extended sitting (while flying or driving), lack of usual activities, poor sleep hygiene, poor nutrition, stress…. I would work with the client on trying to maintain a minimal activity level. Emphasize breaks from extended sitting, give body weight and band exercises for hotel rooms, discuss good sleep practices and stress reduction techniques, and how to eat healthy when dining out.