Celebrity trainer says Instagram fitness stars could be putting people in danger

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Kayla Itsines: "Focus on Being Healthy Fit and Strong"

Instagram is changing the fitness world.

Social media gives normal people an outlet to post their exercise routines, healthy meals, and weight loss.

Many personal trainers have built empires out of their fitness followings — from Hannah Bronfman to Kayla Itsines, the latter of which has built an "Army" thanks to highly shareable transformation photos.

But a top celebrity trainer warned Business Insider that there could be a possible hidden danger of social media fitness: that people are blindly working out without real-life guidance or safety warnings.

"That's my only problem on social media — most of the trainers are personalities," star trainer Anna Kaiser, who runs the boutique fitness brand AKT inMotion, has trained top celebrities like Kelly Ripa and Sofia Vergara, appeared on ABC's "My Diet is Better Than yours," and runs a streaming membership for those who can't access her studio. "They're not educated in fitness, and you don't actually get to interact with any of the people. They're just going off of pictures and videos, and ... could end up hurting yourself for years with injuries that will affect you for years down the road."

When Business Insider spoke to BeachBody on Demand CEO Carl Daikeler in April, he stressed how social media is good for the industry.

"However, the rise of Instagram ... and now, Facebook, and now seeing people like you are fitting it into their day and they're putting in the effort and they're enjoying their life and doing things they never thought they could do," Daikeler said.

"I would just warn people against following a personality or someone who looks great in a bikini and really seek out someone who knows what they're doing, and that's the general feeling in the fitness community today," Kaiser said.

She concedes there are some perks to social media, but that people should be wary.

"Social media is getting more people interested in fitness, but it's also not fitness," she said. "It's frustrating to see how important a social media following is in the world of fitness and business because people who have bikini shots and, you know, sexy pictures of themselves have a lot more followers on social media than someone who's trying to really do it well and maintain integrity."

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Celebrity trainer says Instagram fitness stars could be putting people in danger
NEW YORK, NY - SEPTEMBER 17: Tracy Anderson in attendance at 'My Little Pony Equestria Girls Friendship Games ' New York Premiere at Angelika Film Center on September 17, 2015 in New York City. (Photo by Steve Mack/FilmMagic)
NEW YORK, NY - OCTOBER 07: Fitness Expert Tracy Anderson attends her Zicam Total Immune Launch Event on October 7, 2015 in New York City. (Photo by Robin Marchant/Getty Images for Zicam Total Immune)
NEW YORK, NY - OCTOBER 29: Tracy Anderson attends the 2015 BCRF Awards Gala at The Waldorf=Astoria on October 29, 2015 in New York City. (Photo by Ryan Liu/FilmMagic)
NEW YORK, NY - OCTOBER 07: Fitness Expert Tracy Anderson attends her Zicam Total Immune Launch Event on October 7, 2015 in New York City. (Photo by Robin Marchant/Getty Images for Zicam Total Immune)
NEW YORK, NY - APRIL 23: (L-R) Masumi Goldman of Two Fit Moms, actress Vanessa Hudgens, celebrity trainer Tracy Anderson and Laura Kasperzak of Two Fit Moms attend the Kohl's exclusive Gaiam apparel launch event at High Line on April 23, 2015 in New York City. (Photo by Jennifer Graylock/Getty Images for Kohl's)
NEW YORK, NY - APRIL 23: Celebrity trainer Tracy Anderson (C) poses with Two Fit Moms, Masumi Goldman (L) and Laura Kasperzak at the Kohl's exclusive Gaiam apparel launch event at High Line on April 23, 2015 in New York City. (Photo by Jennifer Graylock/Getty Images for Kohl's)
NEW YORK, NY - APRIL 23: Actress Vanessa Hudgens (L) and celebrity trainer Tracy Anderson attend the Kohl's exclusive Gaiam apparel launch event at High Line on April 23, 2015 in New York City. (Photo by Jennifer Graylock/Getty Images for Kohl's)
NEW YORK, NY - SEPTEMBER 17: (L-R) Tracy Anderson and Penelope Mogol attend 'My Little Pony Equestria Girls Friendship Games' New Yrok Premiere at Angelika Film Center on September 17, 2015 in New York City. (Photo by Rommel Demano/WireImage)
BRIDGEHAMPTON, NY - AUGUST 01: Tracy Anderson, Gwyneth Paltrow and Maria Baum attend the Hamptons paddle and party for Pink-Sunset cocktail party benefiting the Breast Cancer Research Foundation on August 1, 2015 in Bridgehampton, New York. (Photo by Sonia Moskowitz/Getty Images)
NEW YORK, NY - JUNE 11: Tracy Anderson is seen walking in Soho on June 11, 2015 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - MAY 31: Tracy Anderson attends EAT (RED) DRINK (RED) SAVE LIVES Campaign Launch at Pier 26 on May 31, 2015 in New York City. (Photo by Chance Yeh/FilmMagic)
NEW YORK, NY - MAY 31: Tracy Anderson attends Infiniti presents the (RED) Supper to launch EAT (RED) DRINK (RED) SAVE LIVES on May 31, 2015 in New York City. (Photo by Grant Lamos IV/Getty Images for (Red))
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