I think its obvious that Favre has a strong arm. As for his arm being fatigued, I think its more of him not taking part in the off-season activities. I think he sat for a while and then when he said he wanted to come back to the public, he started working out again at a local high school. He'll be fine imo.

Also, from the article:

 

Not that big of a deal IMO. I would be much more concerned with a QB that never has any arm strength even when he is fresh. :wink2: