New Lifters Get Hurt 3 to 10x More. Why?

So, let's compare newer trainees to older trainees and see if there's a sort of gap there in the injury prevalence data. And one of the best comparisons actually comes from CrossFit data. This is from Prado and Gonzales in 2020. These people are doing roughly the same movements with the same equipment in the same environment, same general programming approach. Novice CrossFitters in the first 8 weeks had an average injury rate of 9 and 1/2 injuries per thousand training hours. Experienced CrossFit participants doing roughly the same training had 0. 74 to 3. 3 injuries per thousand participation hours. We see the same signal in Olympic weightlifting where more advanced lifters actually have less injuries than newer lifters. Uh a factor of 3 to 10 in the same sport though in this CrossFit data set. The movements didn't really change. It's just the person's preparation for those movements and their experience did. Now, yeah, this observational, it's not randomized. The people who stuck with CrossFit long enough to be experienced trainees are the same people whose bodies sort of tolerated it, little survivorship bias there. The gap is real and the mechanism we're about to walk through is consistent with it, but part of the gap, again, is a survivorship bias.