i can say, as a kid, all the way up to my late 20's, i ran around on nothing but natural grass. rain, snow, or shine, and never tore an acl, an achilles, a hamstring, twisted an ankle or two, but was never bothered.
no i cannot say synthetic turf is worse, but i would be hard pressed to find something other than a natural running surface that is better than nature.
i think 2 million different animal species would agree.
