Is Zumba popular in Britain? It's really popular in the U.S. among women (and some men of all ages).
I was 63, right on the BMI line of obese, and starting to walk like a "little old lady," according to my husband. I began going to Zumba class 3 times per week and kept it up for a couple of months before going to Europe with my daughter for 5 weeks while carrying an insanely heavy backpack. I would have died and been buried at the bottom of a 10 flight stair up a hill in Barcelona if not for zumba! I lost some weight while there and since I got home, and I've largely kept it off (2 years) through sensible but not onerous eating, walking fast when going places, and zumba.
But the most encouraging thing is that my belly is largely gone. I am basically a pear shape (always had a relatively small waist until about 10 years ago when I found myself stuck with a belly and muffintop). I was very discouraged because it didn't seem to be anything that I could change. But through zumba and fast walking, it happened. Even my hips and rear end are better. It is fun to look for clothes; I don't have to settle for the thing that looks the least bad.
A new WOE is cool, but for it to last, it has to be a new WOL. Zumba is so dang much fun that I look forward to classes rather than dread them. Give it a try! Commit to 3 or 4 classes; everyone goes at their own level--it's the opposite of those competitive classes. The changes in my body and the way I feel give me the encouragement to stick with 5:2. And, I no longer totter around like a little old lady!