“Generation Iron,” November 17 2014 (2013), DVD. This documentary revisits the issues raised by “Pumping Iron” almost 40 years ago, following new competitors. Arnold and Lou make appearances of course and Mickey Rourke narrates as the reigning king, Phil Heath, goes head to head with Kai Greene and others. Each individual’s style, personalities, backgrounds, is shown shaping the event and the competition. Some topics, such as steroids, are soft-pedalled and the issue of corruption is understated, but I still found this very fascinating. It’s a remarkable subculture.