“The science is literally as simple as calories in, calories, out which sounds really boring and really kind of over basic but it really is that simple.
“That is how you are going to lose weight, burn fat, or however you want to put it,” Lilly explained.
Calories are units of energy included in food. The body uses calories to fuel itself.
The former physiotherapist and fitness influencer, who recently gave Express.co.uk her 360 guide to burning belly fat, went on: “How are you going to overall lose weight, on a scale? It’s going to be by being in a calorie deficit.
“That means, basically, how many calories are you taking in, versus how many calories you’re burning. It’s really, really simple.”
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