Cardio Explained: What Aerobic Exercise Does to Your Heart – and How Much You Actually Need
“Cardio” has become one of the most overused and underexplained words in fitness. For some people it means running for an hour until exhausted. For others it means 20 minutes on an elliptical at the gym. For many, it means something they know they should do more of but can’t quite bring themselves to prioritize. […]

