Paul Ryan takes his P90X workout to the campaign trail

DENVER—The rigors of the campaign trail have not kept Republican vice presidential candidate Paul Ryan from his intense workout regimen, a daily tradition he observes religiously in the wee hours of the morning.

Ryan was spotted Tuesday in the gym of the Renaissance Denver Hotel working out to a P90X video on his iPad.

"I'm going to keep myself in shape, that's for sure," Ryan told Yahoo News on Monday when asked if he plans to keep up the habit while campaigning for vice president.

A former personal trainer, Ryan leads a group of members and staff in grueling pre-dawn workouts in the congressional gym in Washington, D.C., when the House is in session.