CHRISTOPHER BERGER, 42, an exercise physiologist and professor at the University of Indianapolis, has an uncommon view of airports and business travel. Where some see frustration, anxiety and long lines, Dr. Berger sees opportunities to move and relieve stress. Where some see an interminable wait, he sees an invigorating walk. “What I try to promote with my interest in air travel is the simple fact that flying can be healthy,” Dr. Berger said. “Travel does not mean deconditioning. You’re stuck in a terminal for three hours, boo hoo, but you have a climate-controlled place where you can walk literally for miles at some airports if you want.” He urges airport managers to develop signs and promotional materials to encourage walking. He talks about the surprising number of airports that are adjacent to public parks and pedestrian paths, easily reachable during layovers. He points out that terminals themselves are big enough to create your own indoor walking path. In other words, Dr. Berger is saying, instead of exercising patience with flight delays, security agents and airlines, just exercise.