At least according to CDC research:
More people are hurt snowboarding than any other outdoor activity, accounting for a quarter of emergency room visits, according to the first national study to estimate recreational injuries. Nearly 26 percent of the injures were from snowboarding followed by sledding (11 percent); hiking (6 percent); mountain biking, personal watercraft, water skiing or tubing (4 percent); fishing (3 percent) and swimming (2 percent).
I’ve taken plenty of lumps biking and boarding, but the worst I’ve racked up was a few stitches on the bike. As for broken bones, my only fracture was a collarbone in a game of flag football 
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June 11th, 2008 at 6:43 pm
Wow, I would not of guessed that hiking was more dangerous than mountain biking.
Only kidding!!!!
I guess I was pretty “reckless” today, since I hiked for about 3 hours in the Wissahickon.
Who knew?
Oh My!
Maybe I should take up biking just for safety’s sake…..