Rep. Paul Ryan -- My Workout Routine Is INSANE

There should be no doubt that Rep. Paul Ryan is up for the rigors of a presidential campaign ... because the wannabe VP has a crazy workout regimen.

As TMZ first reported, our sources in DC say Ryan works out at the House gym every morning at 6:00 AM and his routine is "fierce."

When we asked him about his workout routine, the Congressman from Wisconsin named two of the most popular -- and most difficult -- workout plans around.