What does HRR stand for in cardiovascular training?

Heart Rate Reserve (HRR) refers to the difference between an individual's maximum heart rate and their resting heart rate. This metric is essential in cardiovascular training, as it helps determine exercise intensity levels suitable for achieving specific fitness goals. Understanding HRR allows exercise physiologists and trainers to create more tailored and effective cardiovascular training programs. By calculating HRR, one can identify target heart rate zones that promote improvements in aerobic capacity, endurance, and overall cardiovascular health.

In practical application, HRR is used to gauge the appropriate workout intensity by using percentages of the reserve to establish training zones. For example, if a person's maximum heart rate is 180 beats per minute and their resting heart rate is 60 beats per minute, their HRR would be 120 beats per minute. Training at various percentages of this HRR can facilitate progress towards fitness objectives.

The other choices do not accurately reflect the term used in cardiovascular training and hence do not serve the context of exercise prescription and training effectiveness.