They don't show Tracey's workouts- but she does exercise, just not the killer-gym stuff like the rest. She's walking alot (which is what MOST normal folks do to lose the weight- at least initially), and she was in the pool doing stuff there....so that would add up- combined with the food.But yes, it was dirty pool. Not too surprised that Mo fell on his sword for his teammate/partner. maybe that's why she kept him on HER team and split everyone else up. She knew he wouldn't let anything happen to her.