Back in middle school (we called it Jr High School) I played football and we were told/taught not to use our hands when falling (or being tackled). But of course we did wear protective equipment.
I've always tried to protect hands and elbows when falling. I try to roll with any fall (not that I fall that often). Sometimes I've fallen with little or no damage. Other times things didn't go so smooth. I have never regretted keeping my hands close.
I attended a health fair thingy a few weeks ago. And they brought up the increased/additional higher risk associated with elderly (over 60) and head injuries. Apparently changes within the mature brain makes it much more susceptible to injury. Even head bumps that may not seem serious. Or head bumps where the skin/surface is protected by a helmet. They say now... it is best to get checked out soon after any head hit. This seemed like a good place to share that.