Marcus and Dev dig into the HeartMath flagship review on heart-brain interaction — how appreciation smooths your heart rhythm into a wave your brain syncs with, plus a two-minute morning tempo reset. Read the paper: The Coherent Heart (McCraty, Atkinson, Tomasino & Bradley, 2009, Integral Review) — https://www.heartmath.org/assets/uploads/site/file/pdf/c/coherent-heart-integral-review-2009.pdf