So a couple years ago i coached a set of identical twins the only difference being they routed for difference baseball teams lol. So both had exactly the same background and did the same training and both even had the same hip injury freshman/sophomore year. So both twins ran the mile in 5:22ish freshman year, sophomore year 5:13ish, junior year 4:52. But senior year one goes 4:42 and the other stays at 4:52. All other PRs basically the same. Thoughts to why? I figured it became more mental to the slower twin who didn't improve his senior year. Just thought this could be an interesting topic for discussion. Rojo and Wejo i would love to hear your opinions also.