As fitness influencers gain popularity online, social media is starting to see the growing impact of fitness marketing on kids.”Generation Flex,” a new documentary by Men’s Health, takes an in-depth look at the toll this trend can take on teenage boys.News 9 spoke with producers who said the influence fitness influencers have on young boys needs to be addressed more.>> Download the free WMUR app to get updates on the go: Apple | Google Play <<"When you look at recent statistics, boys and men make up one-third of all recent eating disorder diagnoses. And a large part of that growth is coming from young men who are going to excessive lengths to gain muscle and to lose weight," said executive producer Richard Dorment."Generation Flex" is available now on the Very Local app. Install the app on Roku, Fire TV or anywhere you stream.How to stream “Generation Flex”Download the Very Local app to stream "Generation Flex" for free. Then dive into entire seasons of "Eat Play Stay," "Hometown Tragedy" and much more.What is Very Local?Very Local is a streaming app where you can watch WMUR’s daily newscasts, original series and more. Keep connected to your hometown with the news and weather team you trust, and discover original series and specials that explore your community and beyond.