Source: depositphotos.com (free to use and share)   Maintaining your physique is about more than appearances. It is equally a matter of health.   As a frequent traveler, you will face a lot of physical and mental stress that will affect your immune system, but using every opportunity to fortify your musculature can be challenging when you’re swept up in work or pleasure.   If you’re having a hard time scheduling your exercises during the trips, here’s how to maintain your physique and stay in shape when traveling.  …