The article discusses the role of cardiovascular exercise in fitness, defining cardio as activities that elevate heart rates to enhance heart and lung health. It challenges common perceptions, clarifying that not all physical activities, such as leisurely walking, meet the criteria for effective cardio. The text emphasizes that to qualify as cardio, an activity must sustain a heart rate at 50% of its maximum capacity. It aims to guide readers in understanding the necessary intensity and duration of cardio exercises for optimal results.
"Cardio, short for cardiovascular exercise, encompasses any physical activity raising and sustaining heart rate, primarily aiming to improve heart and lung health."
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