HRRarvojen

HRRarvojen is a term used in exercise physiology to denote the reservoir of heart rate reserve values observed in a population or study. The heart rate reserve (HRR) is defined as the difference between an individual's estimated or measured maximal heart rate (HRmax) and their resting heart rate (HRrest). HRR values are used to tailor aerobic exercise intensity because expressing intensity as a fraction of HRR accounts for individual differences in resting and maximal rates. Target heart rate can be calculated as HRrest + (percentage of HRR) × (HRmax − HRrest). Common zones include 50-70% for moderate intensity and 70-85% for vigorous intensity. In research and practice, HRR arvojen describe the distribution of these calculated targets across a group and are used to evaluate training load, prescribe exercise, or compare fitness levels.

Measurement and interpretation of HRR values rely on accurate assessment of HRmax and HRrest. HRmax is obtained via graded exercise testing; HRrest is measured after a period of seated or supine rest. When maximal testing is not feasible, HRmax can be estimated with formulas such as 220 minus age or more modern alternatives. HRR values can be affected by medications, hydration, time of day, caffeine intake, and acute illness.

Limitations include that certain medications (for example, beta-blockers) blunt HRmax and may reduce the reliability of HRR-based prescriptions. Nevertheless, HRRarvojen remains a simple, widely used metric in sports science and clinical exercise programs to quantify and compare individualized exercise intensity and training load.