Gymkata is a terrible, terrible movie. One that is definitely worth watching.
Probably worth seeing because of it.
Don't forget to listen to the How Did This Get Made podcast about it though!
1985 -- the same year as Back To The Future, and a comparably high budget. Yet it looks like the lowest budget movie you've ever seen. This is classic "chop-socky" (more like schlocky) with the same tired plot as Enter The Dragon and so forth (and same director, but way worse...everything.)
(oh Richard Norton, you gave me hope but this movie is...nope.)
Another fact: blonde-mulleted lead Kurt Thomas received a Razzie for "Worst New Star" for his efforts in this gumph. Good shout.