A new study has warned women that leggings could make the muscles 'lazy' and can result in flabby stomachs and wobbly legs.
For thousands of women, leggings have become a wardrobe staple - to hide all manner of sins whether it's forgetting to wax or having a 'fat' day.
"Leggings feel good and look great and I am as addicted to them as anyone, but there is a downside," the Daily Mail quoted physiotherapist Sammy Margo as saying.
"They hold in and support the quadriceps (thigh muscles), buttocks and core muscles in your tummy, and do the job the muscles are supposed to do.
"As a result, the muscles are allowed to relax and switch off, so when we reveal our bodies for the first time as summer approaches, they are not as svelte or firm as they otherwise would be."
The problem is further exacerbated because wearers' bare legs and midriffs are 'out of sight, out of mind', so women are less inclined to take steps to tone up during the winter months," she added.
Celebrity advocates of leggings include Michelle Obama, Gwyneth Paltrow, Katy Perry and Victoria Beckham, who even launched her own designer range.