Shack Out on 101 (link) is a 1955 cold war gem starring Frank Lovejoy, Keenan Wynn, Terry Moore (she objected to callin' the movie 'shack UP on 101), and Lee Marvin as a bad commie thug named 'Slob'. For those of you out there in need of inspiration to work out a bit more - well, this clip of Marvin and Wynn hoisting the barbells should do it: