Das and Gailey studied the implications of exercising in green spaces during the pandemic. They report that “Previous cross-sectional literature reports protective effects of outdoor exposure on mental health during the COVID-19 pandemic. We longitudinally assess whether green exercise corresponded with a decline in adverse mental health symptoms, controlling for state lockdown policies. . . . we specificized participation in an outdoor walk, jog, or hike (green exercise). . . . results indicate a modest decline in PHQ-4 [patient health]…