"Not only does it help keep you physically fit, but mentally it helps out so much, especially in the job we're in," said former Rep. Bart Stupak, D-Mich., who took turns with Ryan leading the P90X sessions until he left Congress last year. "It's a place you can get away from all the pressures of the job."
Ryan's schedule will become even more demanding in the coming weeks as he hops from state to state shaking hands, giving speeches and raising money. Candidates and their staffs frequently complain about the rigors of life on the campaign trail — little sleep, too much fast food and almost no time for personal luxuries like a good workout.
In his first week on the ticket, Ryan was seen working out in hotel fitness centers before dawn, following P90X workouts playing on his iPad. Romney's campaign said he intends to keep that up unless the travel demands make it absolutely impossible.
Associated Press writer Kasie Hunt contributed to this report.
Reach Josh Lederman on Twitter at http://twitter.com/joshledermanAP
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.