Marcy and Jack take on a two thousand sixteen prospective study — three hundred forty-three soldiers, a ten-minute resting heart reading taken before deployment, and what it could and couldn't predict — with the honesty caveat that prediction is not prevention, plus a two-minute settle-the-ledger morning practice. Read the paper: Heart Rate Variability: Pre-Deployment Predictor of Post-Deployment PTSD Symptoms (Pyne, et al., 2016, Biological Psychology) — https://doi.org/10.1016/j.biopsycho.2016.10.008