Frequent traveler & worker

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Anyone out there travel a lot for work like I do? I am in all four time zones (or at least) every week. I find it hard to fit in time to work out and have to grab what I can to eat when I have time. Often I work until 9 or 10 at night and have to be in the office by 8 or 9. My health is suffering, I'm gaining weight and I feel like crap. What do you to combat this?