This isn’t a secret, although many airports won’t broadcast it either. Lots of airports these days give their customers access to showers, and it could be the best thing to happen to you after a long haul flight.
Imagine you have been stuck on a plane for 12 hours, what is the one thing you want to do more than anything? It is probably to feel less sticky and try to remember what it feels like to not have plane dirt on you.
Staying fit is certainly a commitment. Besides doing the physical training, there are some other factors to consider, like nutrition