Elana Lyn Gross

<a id="c7cbd5a7-4c28-3471-a7f0-b92494b49cc1" href="https://www.businessinsider.com/day-in-the-life-of-kayla-itsines-2017-9?utm_source=intl&amp;utm_medium=ingest"> Kayla Itsines </a> , an award-winning certified trainer and entrepreneur, was running one-on-one sessions in Australia, when her cousin recommended she post client's transformations to Instagram, she told <a id="d3f84f3d-013c-3c78-ac78-65ee6ff96189" href="https://www.businessinsider.com/kayla-itsines-interview-sweat-bikini-body-guide-2017-6?utm_source=intl&amp;utm_medium=ingest"> Business Insider </a> . As her Instagram following grew, people started asking how to do the workout.

So <a id="cb70821a-eb81-375f-abae-53d4f7451f49" href="https://www.businessinsider.com/kayla-itsines-tell-us-what-to-do-if-youve-slipped-up-on-your-diet-2017-6?utm_source=intl&amp;utm_medium=ingest"> Itsines </a> and her partner, Tobi Pearce, founded <a id="ef7ba670-7cf2-38e0-a306-dd8e4b301f4c" href="https://www.bloomberg.com/features/2016-cult-of-kayla/"> Bikini Body Training </a> in 2013. In 2014, they released the Bikini Body Guide (BBG), a 12-week workout program that users could purchase as a PDF and use wherever, whenever.

Next, Itsines and <a id="cffa5269-10d9-39cb-a525-599198381612" href="https://www.businessinsider.com/kayla-itsnines-finance-tobi-pearce-homeless-to-millionaire-2018-5?utm_source=intl&amp;utm_medium=ingest"> Pearce </a> developed their program into a top-ranking fitness app, <a id="860a2b30-86dc-35ba-a790-e63b147f868d" href="https://itunes.apple.com/us/app/sweat-kayla-itsines-fitness/id1049234587?mt=8"> Sweat </a> , where users can find Itsines' curated workouts and other features like a nutrition plan, cool downs, a place to save progress photos, and a weekly workout schedule. The Sweat app has been downloaded by more than 30 million people, according to <a id="eaa809e0-7ec6-3005-aff2-ebf6313a1d3b" href="https://techcrunch.com/2018/06/06/kayla-itsines-sweat-app-will-rake-in-77-million-this-year/"> TechCrunch </a> , which estimated that BBG will have generated $77 million this year.

The weekly schedule (which builds up slowly at first) consists of three 28-minute workouts — legs, arms, and abs — four cardio sessions, one recovery session with guided stretches, and a rest day.

I decided to complete the viral 12-week BBG program to see if I would have results like the hundreds of thousands who tag their before and after pictures using <a id="f852dd85-7168-3610-a359-de9f6fad8068" href="https://www.instagram.com/explore/tags/bbgtransformation/?hl=en"> #BBGtransformations </a> on <a id="2647722c-e5d3-3cf1-ac18-ac0677b39e40" href="https://www.businessinsider.com/kayla-itsines-global-personal-trainer-fitness-instagram-online-community-social-media-2017-6?utm_source=intl&amp;utm_medium=ingest"> Instagram </a> .

Here's how I feel now that I'm done.

<a id="b2101350-7dc1-32cb-aeef-a6b79a0fab67" href="https://www.businessinsider.com/completed-kayla-itsines-bikini-body-guide-workout-results-2018-12?utm_source=intl&amp;utm_medium=ingest#/#i-am-used-to-working-out-1"> See the rest of the story at Business Insider </a>

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I completed Kayla Itsines' viral 12-week workout — and I'm thrilled with the results

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Elana Lyn Gross

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I completed Kayla Itsines' viral 12-week workout — and I'm thrilled with the results