This Italian movie stars Reb Brown, yet another ex-jock-turned-geekdom-icon, who played Captain America in two late-1970s TV movies (and looks the part). I'm not sure what can be said about Yor, other than it's cheesy, and it was a LOT cooler when I was 11. Here's a trailer.
The BEST and WORST thing about this movie is the sublimely bad theme song, which is most notably audible during the opening credits. However, they also use the Queen-like fanfare, clearly derived from 1980's Flash Gordon, to punch up action scenes like this one (skip to about :58 if you like).
Are there worse movies? You bet. Is this one bad? Oh yeah. But I love it.