Lets see if anyone can make sense of this. My sophomore year of college I was working 30ish hrs/week to pay rent and ran PRs over every distance. I was maybe sleeping 6 hours a night. Junior year I didn't work during the school year, slept a lot more, took care of myself better. Other than the easy classes I was taking, I thought that I basically lived like a pro runner. However, I did not pr until school got out and I ran one more race the day after working a graveyard shift. I felt way better than I did during the whole school year. This makes no sense to me but maybe someone else can make sense of it.