I think the Kerry camp feels, and rightly so, there are lingering health questions. Rather than release the results of physical exams they stage little events of Kerry participating in physical activity. IMHO, they are hiding something.
I believe you may be right. The Senator does not look healthy. He frequently takes vacations. Sure, he gets botox injections, but that doesn't explain his pallor and short breaths.
There are better ways to disguise health concerns than portraying the candidate as a 'girlie-man', though! Please, for the sake of sports fans everywhere, this man needs to be banned from participating in any sport! he's starting to make Al Gore look in touch with the average man.