What percentage of maximum heart rate defines vigorous-intensity exercise?

Vigorous-intensity exercise is characterized by elevated heart rates that significantly increase the effort level, generally ranging from approximately 77% to 93% of an individual's maximum heart rate. This level of intensity is sufficient to improve cardiovascular fitness, increase respiratory effort, and typically does not allow for conversation while engaging in the activity.

In contrast, moderate-intensity exercise generally falls within the 50-60% range of maximum heart rate and may allow for some conversation. Intensity levels of 64-76% and 70-80% are often considered to be on the lower end of vigorous-intensity exercise, but they do not reach the full threshold defined for vigorous activities. Therefore, the range of 77-93% clearly defines vigorous-intensity exercise and aligns with the guidelines for achieving substantial cardiovascular and health benefits.