What percentage of HRmax indicates vigorous intensity exercise?

Vigorous intensity exercise is defined by a higher percentage of maximal heart rate (HRmax) as it represents more strenuous physical activity. Typically, vigorous intensity exercise is categorized as being at 76% to 96% of HRmax. This range indicates that the individual is working at a high level that is sustainable for only shorter durations, often accompanied by increased breathing rates and notable difficulty in carrying on a conversation. Engaging in exercise at this intensity is aligned with health and fitness guidelines aimed at improving cardiovascular fitness and achieving various health benefits, such as weight management and improved metabolic health.

The other ranges provided do not align with the widely accepted definitions of vigorous intensity. For instance, heart rates in the ranges of 45-55% and 50-70% of HRmax typically correspond to moderate intensity exercise, where activities can be sustained longer with less effort and still allow for conversation. The range of 65-75% is at the border of moderate to vigorous but does not reach the threshold commonly associated with vigorous exercise. Hence, the correct range indicating vigorous intensity is indeed 76-96% of HRmax.