A scientist is calling for sports bras to be a compulsory part of PE kit in all UK schools to prevent long-term problems.

Joanna Scurr, an expert in breast movement at the University of Portsmouth, said that young girls often wear normal bras for exercising which can lead to “breast pain, embarrassment and potential long-term sag”.

Now in a campaign featured on Channel 4’s Sex Education Show tonight, Dr Scurr is advising that sports bras become a mandatory piece of kit in the same way mouthguards are for hockey and rugby.

She said: “Many young women don’t understand the implications of making the wrong choice when it comes to breast support.

“Our research demonstrates that the correct bra reduces breast movement and associated pain and may reduce the risk of long-term breast sag.

“Giving girls the right information at an early age can improve their body image and even encourage greater take-up of sport at school.

“Mouthguards are a compulsory part of PE kit for schoolchildren when playing hockey and rugby and I want to see sports bras for girls become the same.”

Sweatshop women’s wear buyer Amanda Brasher said: “Sex education is part of the national curriculum and there appears to be plenty of information on sexual education and health but breast health and the issues associated with this are largely neglected.

“We are excited to be working with the university to help de-mystify the subject and encourage girls to feel more confident about their bodies.”