Even before you interview, you should start preparing for the Physical Abilities Test. If you get as far as receiving a conditional job offer you DON'T want to flush it down the toilet by failing the PAT. Even if you are in GREAT SHAPE, you could still fail. ESPECIALLY if you are a rail fan, or if you feel that a lot is riding on you getting this job (like if you have 10 kids and one on the way and you NEED health insurance). They monitor your heart rate throughout the PAT, and if you are nervous, it could increase your heart rat to unacceptable levels, causing you to fail. This has been KNOWN TO HAPPEN. I have read about this in various RR discussion groups. DON'T LET IT HAPPEN TO YOU.
Here's a link to a great article on prepping for the PAT. It's never to soon to start. http://www.ehow.com/how_4533656_class-railroad-physical-abilities-test.html
Here's a link to a discussion on the railroad employment forum about the BNSF PAT:http://railroad.net/forums/viewtopic.php?f=2&t=55511&start=0
As I find more resources on this I will post them. Remember, AT HEALTHY. CUT OUT THE ADDED SALT. EXERCISE REGULARLY. LEARN TO DEAL WITH STRESS EFFECTIVELY.