Jessie Jones, qualified personal trainer at OriGym Centre of Excellence, agrees.

“Just the idea of working out, changing your diet or transforming the way you look, purely for somebody else, is a damaging mindset,” she says. “A revenge body is all about what you look like and you can often feel results before you see them. Using revenge outsources your motivation to someone else.”

No matter how bad the breakup may be, feelings of anger and the desire to get “revenge” can dissipate. “Revenge, and the feelings that go with it, are acute and generally short lived,” former personal trainer Lucy Arnold explains. Embarking on an exercise routine, however, is the opposite.

“You need time and patience to see results.  If you start a regime based on emotion, you expect to see results as quick as you see your emotions change, which will never happen,” she says. And she’s right: research by University College London found it takes on average 66 days to form and solidify a new habit – a long time, considering it could take far longer than two months to see changes into your physique.

Stop building a ‘revenge body’: why the best post-breakup fitness regime doesn’t involve thoughts of your ex