He's always running around LA trying to stop terrorists, yelling "damn it" once every two hours, getting into struggles, emotional and physical, and he has died twice in his life. I think we should cut the guy some slack before he cuts our throats, agreed?
Well I get tired after a short work day. Imagine staying up for 24 hours in a row risking your life kicking ass for the duration of an entire day!
I think it's Kiefer. He is getting older (almost 40 i think) also I believe he is or was a smoker so yeah running around carring a bag full if crap fully dressed would take a lot out of a man :-)
Nice catch there, Kiefer is in fact a smoker and based on the second episode of season two, I got the feeling that the character is one as well (although network primetime frowns on main characters smoking, unless they are the bad guy).