i thought rest was for people who were not serious

the data looked perfect my garmin watch said i was ready. training load: optimal. recovery time: 12 hours. hrv looked good. so i laced up for another tempo run. it was tuesday. i had already run sunday, cycled during the week, and crushed a threshold session on thursday. but the numbers said i could handle it. and i trusted the numbers more than i trusted how i felt. halfway through the run, my…