A bioactive compound found in cocoa powder and dark chocolate could help middle-aged adults enjoy exercise, a new study has suggested. The research analyzed the potential health benefits of cocoa flavanols, a plant nutrient extracted from cocoa beans. Cocoa flavanols are found in abundance in cocoa powder, and to a lesser extent in dark chocolate, and can be consumed as a supplement. Because cocoa flavanols have a 'vasodilatory' effect, helping to increase blood flow, they've been shown to prevent blood clots and even combat memory decline. And the report found that cocoa flavanols contribute to faster oxygen uptake kinetics—with improved...