As it turns out…I’m tired. Just really, really tired. My partners and I are participating in a study to examine the physiologic toll that nights on call have on our bodies. We are all wearing these little wrist bands that track our heart rate and sleep. We check our apps every morning…the little wheels spin and spew forth numbers about our heart rate variability, our sleep quality, and our “recovery”. This data will be matched with our call schedules and...