The reclusive reality star is getting back in shape after gaining more than 100 lbs.

By Michele Corriston
August 25, 2015 10:20 AM
Denise Truscello/WireImage

It seems Rob Kardashian is serious about getting back to his old self – with the support of his sister.

“Rise & Grind! Workout time!!!!! With @robkardashian,” Kim Kardashian West Tweeted on Tuesday morning.

Rob, 28, is exercising again after secluding himself over the past couple years because he gained more than 100 lbs.

On Monday, the reclusive reality star posted an Instagram of sister Kylie Jenner, 18, and her boyfriend Tyga, 25, after running into them during his “morning workout.”

And earlier this month, Kim, 34, Tweeted that she and her younger brother “went on the hardest hike ever.”

In the past, she’s preached tough love when it comes to Rob following the family’s failed interventions.

“At some point you just have to give it up. We all make his life so easy. ‘Okay, we’ll drive you around with a chauffeur so no one has to look at you,’ ” she said on Keeping Up with the Kardashians in April. “We’re not gonna cater to him anymore, but it has to be all of us. … He’s still competent to where he can ask for help if he needs it.”