Could concussions in sport be linked to brain conditions?

New research reveals that markers of Motor Neurone Disease are more likely to be found in the blood of retired sportsmen who have suffered several concussions, offering hope of early diagnosis and possibly earlier treatment.

It also adds more weight to growing evidence of the link between contact sports and brain conditions. So, where does this leave sports like rugby?

Martin Stew tells Lucrezia Millarini what you need to know...