Wednesday's health and safety news from the world of football:
* NFL.com reported that wide receivers Wes Welker of the Denver Broncos and Percy Harvin of the Seattle Seahawks shrugged off concussion concerns during Super Bowl Media Day. Both players missed extended periods of time this season because of head injuries.
Staying on the field always has been a challenge for the Seattle Seahawks wide receiver, but this season was especially trying. Harvin sat out 15 of 16 regular-season games while recovering from hip surgery. He returned -- and looked good -- in the divisional round against the New Orleans Saints until a head injury pushed him to the background again.
"Man, it was tough," Harvin told Around The League during Tuesday's Media Day. "It was very tough. Especially knowing that I had prepared for that game, I had a good week and my legs were starting to feel how I wanted them to feel during the game. I felt really good, I knew I was going to finish that game without a problem.
"So to finally get the hip going then go out with a concussion, I just really couldn't understand it at the time."
Moss put his journalist hat on, though, asking Welker with his second question if Welker would play through a concussion in the Super Bowl.
"What do you think?" Welker replied. "I mean, you want to be out there. The Super Bowl, this is what you dream about. You're going to be there, I don't care what it takes, you're going to be out there for this game."
* Another study linked altitude and concussions: ESPN published the Journal of Orthopaedic and Sports Physical Therapy's report on concussions from the first 16 weeks of the 2012 and 2013 NFL seasons, and found that the number of reported concussions was 32 percent lower in games played at higher elevations.
* The Associated Press reported that Miami Dolphins owner Stephen Ross said he expects the findings of the investigation of the saga involving teammates Jonathan Martin and Richie Incognito to be released soon.
* The Business Journals published an opinion piece that said the NCAA, not the NFL, is the key to the concussion issue.
* Noozhawk in Santa Barbara, Calif., profiled the UC Santa Barbara researcher who received a grant from the NFL/GE Head Health Challenge.
* WBUR-FM in Boston looked at a group trying to create the National Robotics League for football to try to avoid injuries to humans.
-- Bill Bradley, contributing editor