Steven Vincent Leigh's personal trainer for the film was a former European bodybuilding champion. Jeff Wincott, impressed by how muscular Leigh was getting and not wanting to be outdone, began working with the trainer as well. It became a competition between the two as to who could get in more impressive shape, and as a result, the two become noticeably more muscular throughout the film.
Richard W. Munchkin claims that the script was only 47 pages long, whereas most other scripts at the time were between 90 and 110 pages. In his own words: "The last 40 minutes of that film was [one] line in the script - 'He goes to a big tournament, and wins.' That was it."
Released theatrically in the Philippines and South Korea.