An expert has called for “immediate research” after a study suggested that elite rugby union players could be at increased risk of brain conditions like motor neurone disease.
The study examined a link between sport and neurodegenerative diseases such as Parkinson’s, MND and dementia.
The MND Association said the study raised “more questions than answers”.
Scientists said the study should encourage “dramatic changes” in rugby to reduce the risks of brain injury.
Rugby authorities have been told they should look to minimise contact training and reduce the global calendar.
The research team was led by consultant neuropathologist Professor Willie Stewart, honorary professor at the University of Glasgow.