Rob Kardashian's continuous weight gain; Bruce Jenner's alleged sex change to blame?

As much as Rob Kardashian hates the spotlight, the only son to Kris and Rob Kardashian Sr. was seen leaving a gym in L.A. on Jan. 27 after continuing to lose weight.

It is no secret that the youngest Kardashian child has been battle weight issues over the years, but the 26-year-old is being positive by working out.

It seems that Rob is getting his wishes, because Bruce Jenner's surgery has been the talk of the town now. In the photo Rob is wearing a black sweatsuit outfit, it seems that dark colors disguise his weight.

Related Story: Bruce Jenner's sex change revealed? Kylie and Kendall puzzled over the new look; Kris Jenner being blamed for the plastic surgery?

Although Rob is trying to get healthier, the Keeping up with the Kardashian star does appear heavier than he did in recently months.

Earlier in the year Rob told Us Weekly that he was working on losing weight by dieting and exercise. "I still have to lose like 40 to 50 pounds believe it or not, six months I should be there."

One source is revealing that the Kardashian is depressed. "Rob is really depressed. He's not as close with his family right now, and he won't answer a lot of texts and calls from friends."

"Rob has a trainer he's supposedly working out with. But Rob rarely shows up for their sessions. He's not losing any weight. The family is very concerned about him."

MStars hopes the Rob can pull it together and get healthier.