(Cover) - EN Star Style - Kim Kardashian is teaming up with her mother to launch a fitness challenge for the masses.

The American socialite, 30, and her 55-year-old mother have recently signed a deal with the brand Skechers to front the promotion Shaping Up with The Kardashians a twist on the title of the familys reality television show entitled Keeping Up with the Kardashians.

The bronzed brunette pair will challenge the public to keep fit and work out while wearing Skechers athletic attire in 2011.

"Shape-ups have already impacted my fitness routine for the better," Kim told E! News. "I am always on-the-move and never know exactly when I can fit in my next workout."

The mother-and-daughter are very active and Kris says that even her everyday chores are enough to bring her fitness levels up and wear her out.

The dark-haired beauty, who is married to Olympic Gold Medallist Bruce Jenner, admitted that even when she is at work she is burning off calories.

"I am constantly on my feet, running from one appearance to the next, but with Shape-ups, I am always working out, even when I'm working," she said. (C) Cover Media