Kate was seen leaving work this week looking somewhat rounder than she has for some time.
Her participation in Strictly Come Dancing involved hours of energetic dance training, which is in stark contrast to her day job which is far more leisurely.
And as a result of the daily dance workouts she dropped from a size 12 to a trim size 8-10.
Larger than life: Kate cuts a plumper figure as she leaves GMTV's studios in London earlier this week
However, following her exit from the show last year fitness is again low on the agenda.
Kate said at the time: "I'm now an 8-10 rather than a 12. My muscles are unbelievably toned and taut. I don't think my bottom has ever been so trim.
"Maybe that come from six weeks of being told to dance like a hooker!"
She also admitted that she had low fitness levels before training started, to add to the lack of dance experience, which suggests she no lover of a daily gym workouts.
Now and then: A fuller Kate, left, earlier this week, has piled on the pounds compared to last year's Strictly Come Dancing heyday
But with a full seven-hour day at work, starting at 2.30am when she leaves home to present from the GMTV sofa, and 18-month-old daughter Darcey, maybe a two-hour workout is not high on her list of priorities.
During the show Kate admitted her newfound body confidence had encouraged her to flaunt her new figure for husband Derek.
She even planned to seduce him by wearing nothing more than a fur coat.
She said: "I saw a film once. This woman went to meet her lover in a delicatessen at midnight wearing just a fur coat – nothing underneath," she confided.
"I thought it was unbelievably sexy. I'd love to do something like that."
