Vannessa Cross has admitted her drastic 100lb weight loss has made "exercise even harder".
The 1000-lb Best Friends star, 44, impressive weight loss in the last 12 months appears to have an adverse affect when Vannessa and good friend Meghan Crumpler attempt a five kilometre charity walking race.
In a trailer clip on the TLC's Instagram page, Vannessa and Meghan filmed during the first of a three-lap circuit in order to complete the distance.
