Documentary follows Jim Harbaugh on journey to South America

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

• The San Jose Mercury-News featuredSan Francisco 49ers coach Jim Harbaugh, whose goodwill trip to South America was detailed in a documentary set to air on a regional sports cable station Tuesday night.

• The Tennessean looked at the widespread use of the Guardian Cap at high schools in its area, especially with players who have suffered a concussion.

• The Daily Aztec followed up on the Balance Tracking System, which was developed at San Diego State University.

• a three-day series examining head injuries in football.

• on how trainers and coaches are adapting to the state's new concussion rules.

• KVUE-TV in Austin, Texas reported on the high number of lower-rated helmets being used by Central Texas high schools.

• about the importance of recognition and proper treatment for concussions in youth football.

-- Bill Bradley, contributing editor