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A video posted by ROBERT KARDASHIAN (@robkardashian) on



Nobody can deny she's a good influence on him!

Rob Kardashian has been steadily dropping weight since his romance with Blac Chyna began, but now his new fiancee is going to help him shed those last unwanted pounds by being his trainer for the next five weeks! In a series of Snapchat videos, the former stripper gets the reclusive reality star to agree to the fitness regime, and then shows him making good on his promise by sweating it out on the treadmill.

In other clip, Kimmy K's brother steps on the scale and weighs in at 248 lbs, which he declares is only about 50 lbs away from his goal weight! Go Rob!