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Arthur T Knackerbracket has found the following story:
In an investigation of head impact burden and change in neurocognitive function during a season of youth football, researchers find that sub-concussive impacts are not correlated with worsening performance in neurocognitive function.
[...] A research team, led by Sean Rose, MD, pediatric sports neurologist and co-director of the Complex Concussion Clinic at Nationwide Children's Hospital, followed 112 youth football players age 9-18 during the 2016 season in a prospective study.
"When trying to determine the chronic effects of repetitive sub-concussive head impacts, prospective outcomes studies are an important complement to the existing retrospective studies," says Dr. Rose. "In this study of primary school and high school football players, a battery of neurocognitive outcomes tests did not detect any worsening of performance associated with cumulative head impacts."
[...] In their secondary analysis, they found that younger age and reported history of attention deficit hyperactivity disorder (ADHD) predicted score changes on several cognitive testing measures and parent-reported ADHD symptoms. Additionally, a reported history of anxiety or depression predicted changes in scores of symptom reporting.
-- submitted from IRC
(Score: 2) by Thexalon on Thursday October 18 2018, @07:56PM
There's more of a concussion problem in rugby than you might think, at least according to this [brain-injury-law-center.com].
As for bleeding, the fact that there's a rule that you have to be subbed out if you're bleeding should be an indication of how common that is.
The only thing that stops a bad guy with a compiler is a good guy with a compiler.