WOODINVILLE, Wash. -- A free Sports Safety Clinic took place Tuesday night at Woodinville High School. A panel of experts told students, parents, and coaches that concussions are brain injuries that must be taken seriously.

Dr. Stanley Herring, a team physician for the Seahawks and the Mariners, teaches about the dangers.

Concussions alone are somewhere between 13-18% of all high school injuries, said Herring.

Zackery Lystedt of Maple Valley attended the clinic with his family so he could tell his story.

Zackery suffered a catastrophic injury from playing football, said Victor Lystedt, Zackery's dad.

The injury happened in 2006 when Zackery was 13-years-old.

If a child is suspected of having a concussion, when in doubt sit them out. It is not worth the rest of your life. It is just not worth what can happen, said Zackery.

Tuesday's events were coordinated by Safe Kids Eastside.

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