The “best” exercises for heart health depend on your individual physical health and fitness level. Everyone is different, and it’s important to start off slowly and safely with any exercise routine. Both steady-state aerobic exercise and high-intensity interval training (HIIT) improve blood flow, but they do it with slightly different hemodynamic profiles. HIIT generates intermittent bursts of higher shear stress on artery walls, which acutely stimulates greater nitric oxide release. How cardio benefits your skin Similar improvements appeared in the…