Here’s some plane, sound information on the physical activity amenities at US hub airports, airport walking programs, strategies to employ to reduce the impact of jet lag on athletic performance, and how to deal with medical issues when you fly. This, and more, can be found by checking out the ACSM, Exercise is Medicine Task Force on Healthy Air Travel at 

http://www.acsm.org/AM/Template.cfm?Section=Home_Page&TEMPLATE=/CM/HTMLDisplay.cfm&CONTENTID=12800