Generation Iron 2 (2017) on Netflix

Plot summary

Bodybuilders of a new generation work toward developing the most massive physiques they can. A sequel to Generation Iron, the documentary follows five leading bodybuilding and fitness competitors on that journey, in a sport whose rules for what makes a successful mass monster have shifted. The internet and social media have opened the industry to viral stars, and younger athletes push at how large a human physique can become. Other competitors from the sport appear in the film as well. New people and a new world shape what counts as an iconic bodybuilder, and the athletes carve their own route to physique perfection.