Jessie also enlisted a personal trainer, following a fitness plan.
She did three hour and a half work outs per week.
She told the Mirror: “I go to the gym three times a week and do half an hour on the running machine, interval training.
“And then I work on my arms, my legs, my a***, my tummy, every part of the body, doing weight machines. And then on the days when I’m not in the gym, I just go for a really long run.
“And every night in front of the telly, religiously, I do 300 stomach crunches.”