Final answer:
80% of HRR is equivalent to 80% of HRmax for a given person.
Step-by-step explanation:
The 80% of HRR is equivalent to 80% of HRmax for a given person. HRR, which stands for Heart Rate Reserve, is the difference between HRmax and resting heart rate (HRR = HRmax - resting heart rate). So, if 80% of HRR is equal to 80% of HRmax, it means that both values represent 80% of the individual's maximum heart rate.