Rob Kardashian Throwback Photo Zeroes in on Weight Gain: 'Started Right Here With These Milkshakes'

Kardashian shared a throwback Thursday photo featuring himself enjoying multiple milkshakes

Photo: Courtesy Rob Kardashian

The first step to solving a problem is admitting you have one.

That may be the sentiment behind Rob Kardashian‘s latest throwback photo on Instagram. The reality start shared a photo on Thursday in which he’s seen enjoying a milkshake after he’d seemingly already finished a couple others.

“Started right here with these milkshakes #throwbackthursday,” Kardashian captioned the photo, presumable referring to his struggles with weight.

Kardashian has come a long way since the milkshake photo. Celebrity trainer Gunnar Peterson recently told PEOPLE that Kardashian has been in the gym regularly as he works to shed the 100 lbs. he’s gained over the last year.

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“Rob is always in!” Peterson told PEOPLE. “He’s slammed schedule-wise and still makes this work.”

Kardashian has also made his workouts a family affair. On Tuesday, Kim Kardashian West tweeted “Rise & Grind! Workout time!!!!! With @robkardashian.”

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Rob also shared a photo from his workout on Monday.

“Spotted these fools on the morning workout,” he captioned a photo of sister Kylie Jenner and her boyfriend Tyga on a running path.