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Instagram is spurring the biggest shift the fitness world has seen in decades
Kayla Itsines Transformation
Kayla Itsines Transformation

(Instagram/Kayla Itsines/stayfitandtravel)
People who do Kayla Itsines' Bikini Body Guide have created a community online in which they track their progress along the way of their respective journeys.

Log on to Instagram and chances are at least one of your friends has posted a photo of his or her workout regimes or healthy meals. Maybe you're repulsed and disgusted by it.

Consider that part of the process.

A "first reaction [is] to resent how much their friends are posting sweat selfies and ... drinking their shakes," says Carl Daikeler, CEO of at-home workout company Beach Body.

After all, the constant in-your-face nature of wellness is a sharp detour from how things used to be. It was once easy to ignore the need to have a healthy lifestyle; you could just go about your life without constant reminders that you could be healthy.

"However, it has been easy to completely ignore ... an active lifestyle and food choices that would enhance your life," said Daikeler, whose company introduced iconic programs such as Insanity, P90X, and 21-Day Fix to the world.

"It's been so easy to make that optional because it wasn't in your face [before]. Right?" he said. "You go about your life, you've got to do your job, your kids [are] expecting everything of you, but the one thing that was very easy to skip is exercise, and [it was] very easy to justify grabbing pizza because you worked so hard today and your boss yelled at you and you were under so much pressure that you just need a little gratification."

That's not an option anymore.

"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.

That could mean sharing a healthy meal that's diet-friendly or sharing post-workout photos.

Autumn Calabrese, the trainer behind the extremely popular 21-Day Fix, also sees the importance of social media.

"For me, coming from being the trainer, I think that it's huge in the fact that it is all about sharing your success or sharing people's success," Calabrese, who shares clients' results on her own Instagram page, said to Business Insider.

It also serves as a new way to show off results — and perhaps more importantly, the process of getting those results, and the process can be the unfortunate part.