“ I have absolutely no recollection – and when I say no recollection, I mean absolutely no recollection – of a single second of a rugby match.“revealed the rugby player Sébastien Chabal in the podcast Legend in April 2025. Although the player has not consulted a neurologist, he does offer a hypothesis to explain his condition: the numerous impacts he has received on the field. Two British rugby players had also announced that they were suffering from early-onset dementia for the same reason.
By Marie Parra THE Subscribers
Head injuries are common among professionals in contact sports, particularly combat sports. American researchers have identified a function particularly sensitive to repeated head impacts: the brain's waste removal system.

Two athletes face off in a world boxing championship event in Japan on November 24, 2025.
YUSUKE MATSUMOTO / YOMIURI / THE YOMIURI SHIMBUN VIA AFP
