Even if you played rugby 24/7, you probably won’t get MND unless you have a genetic weak spot. Scientists have found that about 10% of MND cases are directly inherited, like a terrible family heirloom no one wants.
The other 90% are "sporadic," meaning it’s a cruel coincidence. But for rugby players, the combo of a common gene called C9orf72 and repeated head trauma might be the perfect storm. It’s like your DNA hands you a loaded water pistol, and then rugby refills it every weekend with hard knocks.
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Here’s a shocking fact: a 2026 study found that former rugby players are 15 times more likely to die from MND than the general population. Let that sink in. That’s not a typo—it’s a terrifying, 15-times-higher chance of developing a disease that has no cure.
The "Meat Pile" Problem
Let’s talk about the military for a second. Studies on soldiers show similar risks from repeated blast exposure. Why? Because your brain doesn’t know if it’s being smashed in a scrum or hit by a bomb—it just knows it’s angry.
Rugby players are essentially professional impact test dummies for the human body. Their cervical spine (the neck) takes a beating, and that can compress the spinal cord. Guess what? MND loves to start in the spinal cord, like a virus kicking down a door that’s already unlocked.
It’s not about being tough. It’s about physics. When a 120kg player runs into another 120kg player at full speed, their brains don’t stop moving until they hit the inside of their skulls. That’s not a debate—that’s Newton’s law of being a meat pile.
