I seem to remember Kate doing a fair bit of exercise in the BB house (certainly for the first few weeks). Lots of workouts with Lee, Adele and Jade. She also used to go up and down those stairs until I felt exhausted!!
She didn't do so much in the last couple of weeks though so I imagine that's when she started putting on the pounds. I certainly didn't notice a significant difference in her weight though as I did with Jade and Adele. I'm really surprised she put on as much as a stone, especially as she spent so much time on the "poor" side.
