I do a lot of traveling. Over the years I have learned a few tricks that help me squeeze both good nutrition and exercise into my travels.
Flights get delayed, hotel fitness equipment is not always available, and business dinners can be high-calorie affairs. Flexibility means taking the stairs when possible or walking around the airport terminal when waiting on the inevitably delayed flight (if you have carry-on luggage -- even better as it adds extra resistance and helps get that heart rate up). If your hotel does not have a fitness center, use the extra floor space in your room for calisthenics, jumping rope, running or marching in place, or even dancing to the local tunes coming out of the clock radio. Set the alarm or wake up call for 20 min early, roll out of bed, put on your gear and just MOVE.
Forget the airline “food” and bring your own flight friendly snacks. Keep lower-calorie, healthy snacks close by, and try to eat every three to four hrs at a minimum. Try snacking on nutrition bars, dried fruit, or whole grain crackers. On long car trips, I pack a cooler with water, diet sodas, low-calorie yogurt, fresh fruit, veggies and a light dip. Snacking throughout the day keeps hunger at bay, making a raid on the vending machine less tempting, plus healthy snacks give you're body a boost with extra nutrients and fiber.