Yeah, the only data out there is on stick-and-ball sports.
However, the differences between football and motocross are so vast as to make the comparisons virually meaningless.
One small example: it is relatively easy to catch your foot on a root or rut and hurt your knee. "Hurt" in this case can mean anything from a minor "tweak" that hurts a bit but does no damage up to a bunch of blown ligaments and everything in between. Doing something similar in football is EXCEEDINGLY difficult, if not totally impossible. Just like it is pretty difficult to have a 300lb lineman roll on your leg and blow out your knee in motocross.
Drawing conclusions about apples, based upon a bunch of data collected on oranges, is generally not going to yield meaningful results.
However, the differences between football and motocross are so vast as to make the comparisons virually meaningless.
One small example: it is relatively easy to catch your foot on a root or rut and hurt your knee. "Hurt" in this case can mean anything from a minor "tweak" that hurts a bit but does no damage up to a bunch of blown ligaments and everything in between. Doing something similar in football is EXCEEDINGLY difficult, if not totally impossible. Just like it is pretty difficult to have a 300lb lineman roll on your leg and blow out your knee in motocross.
Drawing conclusions about apples, based upon a bunch of data collected on oranges, is generally not going to yield meaningful results.