Marcus Lattimore debuts as part of 49ers roster after long knee rehab

Tuesday's health and safety news from the world of football:

  • The San Jose Mercury News reported that San Francisco running back Marcus Lattimore, who has spent nearly two years rehabbing from a horrific knee injury at South Carolina, will participate in his first full workout with the main 49ers' roster for the first time Wednesday.
  • USA Today reported on a study in the "Journal of Athletic Training" that the majority of high school football players lack knowledge about concussions and that might influence their decisions to report symptoms.
  • WFAA-TV reported that the NFL wives association, known as Off The Field, will meet with NFL Commissioner Roger Goodell this week to discuss personal conduct issues.
  • Mashable noted that two players have suffered ACL injuries celebrating sacks this season.
  • US News & World Report offered a study from the San Francisco Veterans Affairs Medical Center that said a concussion after age 65 could increase the risk of dementia.

-- Bill Bradley, contributing editor

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