By Shuwen Li

With Greg Page

The National Football League (NFL) has recently begun to enforce rule changes in order to reduce player injuries. In particular, the NFL rule changes have been designed to reduce concussions, as well as career-threatening injuries to the knee area, such as Anterior Cruciate Ligament (ACL) / Medial Collateral Ligament (MCL) tears.

The NFL modified kickoff rules after reviewing data indicating that players’ concussion risk on kickoffs was nearly four times greater than their risk of a concussion on running or passing plays. …

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