Fans love American football for its bone-crunching hits. But after a 2010-2011 season filled with violent collisions that saw several players sustain severe concussions - including stars from both teams playing in this weekend's Super Bowl - the risk of brain injury for anyone who plays the game is front and centre.
National Football League (NFL) football commissioner Roger Goodell has issued repeated statements assuring players and fans alike that the organisation is committed to protecting all players, not just professionals. Meanwhile, the players themselves are split between respecting and openly mocking rules changes designed to prevent head injuries.
The real solution is likely to come in the form of a new crop of "smart" helmets. While not expected to take the field until next season at the earliest, these new rigs come lined with sensors that can detect dangerous impacts, send warnings to sideline coaches, or even upload data to medical centres for real-time analysis.
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