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<blockquote data-quote="MtownJacket" data-source="post: 323646" data-attributes="member: 423"><p>For the record, this is false. Better helmets can and do reduce concussion rates. That can be demonstrated in two ways. One is a simple physics explanation. The other is the numerous studies that have been conducted over the last few decades (example: <a href="https://www.ncbi.nlm.nih.gov/pubmed/16462481" target="_blank">https://www.ncbi.nlm.nih.gov/pubmed/16462481</a>).</p><p></p><p>Now for the simple physics explanation. Ignoring the fact that rotational acceleration is important in concussions, a simple prevention model would be to minimize peak linear acceleration in head collisions (<a href="https://www.ncbi.nlm.nih.gov/pubmed/20351593" target="_blank">https://www.ncbi.nlm.nih.gov/pubmed/20351593</a>). Consider a football player whose head is moving at a certain speed before before head collision and is at rest after head collision. In order for a change in head velocity to occur there must be acceleration. One way to minimize the peak acceleration is to ensure that the force the helmet exerts on the head is relatively constant rather than a sudden spike. That can be achieved with clever helmet design and material choice. Current helmet designs have poor shock absorption mechanisms involving collision forces that aren't remotely constant. Another way to minimize peak acceleration is to have a smaller force acting over a longer distance. That translates into thicker helmets with softer shock absorption.</p><p></p><p>There is a lot of room for helmet innovation.</p></blockquote><p></p>
[QUOTE="MtownJacket, post: 323646, member: 423"] For the record, this is false. Better helmets can and do reduce concussion rates. That can be demonstrated in two ways. One is a simple physics explanation. The other is the numerous studies that have been conducted over the last few decades (example: [URL]https://www.ncbi.nlm.nih.gov/pubmed/16462481[/URL]). Now for the simple physics explanation. Ignoring the fact that rotational acceleration is important in concussions, a simple prevention model would be to minimize peak linear acceleration in head collisions ([URL]https://www.ncbi.nlm.nih.gov/pubmed/20351593[/URL]). Consider a football player whose head is moving at a certain speed before before head collision and is at rest after head collision. In order for a change in head velocity to occur there must be acceleration. One way to minimize the peak acceleration is to ensure that the force the helmet exerts on the head is relatively constant rather than a sudden spike. That can be achieved with clever helmet design and material choice. Current helmet designs have poor shock absorption mechanisms involving collision forces that aren't remotely constant. Another way to minimize peak acceleration is to have a smaller force acting over a longer distance. That translates into thicker helmets with softer shock absorption. There is a lot of room for helmet innovation. [/QUOTE]
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