A friend of mine broke her leg in three places from falling off a bike. She was biking at a low speed, just for fun, on a neighborhood street.
She was 12 years old.
Age and diet has nothing to do with it...the human body did not evolve around concrete and bicycles. Maybe he didn't get enough calcium in his diet, but that doesn't change the fact that human bones can break when falling a few feet onto concrete. Heh, my brother fell off a table in the 5th grade, and fractured his arm.
Stumbled into Primal due to food allergies, and subsequent elimination of non-primal foods.
Start Gluten-Free/Soy-Free: December 2012; start weight 158lbs, Ladies size 6
Start Primal: March 2013, start weight 150lbs, Ladies size 6
Current: 132lbs, Ladies size 2
26lbs lost since cutting the crap.