What is the appropriate intensity level for improving cardiorespiratory fitness in adults?

Improving cardiorespiratory fitness in adults generally requires a moderate to vigorous intensity level, which is typically defined as 65% to 85% of maximum heart rate. This intensity range effectively stimulates cardiovascular adaptations and improvements in aerobic capacity. Training within this zone promotes the heart’s efficiency, enhances oxygen delivery, and improves the overall stamina and endurance of the individual.

Engaging in exercise at this intensity level enables individuals to elevate their heart rate sufficiently to provide significant cardiovascular benefits while still being manageable for most adults. It strikes a balance between challenge and sustainability, making it a practical target for most fitness programs aimed at improving cardiorespiratory health.