Rob Kardashian is fighting weight gain by hitting the gym as he posted a photo online while working out on March 28. The "Keeping Up With the Kardashians" star missed a family holiday in Thailand in order to shed off some fat.

The sock mogul didn't take a selfie this time, but took a snapshot of what he saw while working out. The gym had lifts, treadmills, basketballs and even a television set, according to Us Weekly.

The photo was simply captioned: "Just follow the yellow brick road."

Rob Kardashian's weight gain is apparently what's keeping him from joining the family on a trip to Thailand.

The Kardashian-Jenner clan seems to be enjoying themselves as photos published on MailOnline showed. There was Kim Kardashian on a gray bikini showing her slim waist in Phuket, then there's Khloe Kardashian who was wearing a one-piece swimsuit and a captain's hat. There's also aspiring model Kendall Jenner and younger sister, Kylie.

Bruce Jenner and his two sons also joined in the family's holiday plus momager Kris Jenner, who marvelled at the fire dance from a local.

Rob Kardashian's weight gain has become a source of embarrassment for the family, said Radar Online, especially Kris Jenner who saw the extra pounds as something that can ruin the Kardashian brand.

Kris Jenner was also worried that Rob Kardashian's weight gain might eventually kill him as she told him outright in one of the episodes of "KUWTK":

"This is life-threatening at this point. You can only sustain this level of being unhealthy for so long," momager Kris Jenner said of Rob Kardashian's weight gain.

The sock mogul, however, is also aware that he needs to do something about his weight gain.

Rob Kardashian earlier told Mirror: "I've never felt so down depressed in my life. I'm trying to be in the fashion industry and I'm not going to be taken seriously when I'm fifty pounds overweight. It's embarrassing to the family," he said.