Heart Rate Zones for Age 73: Target BPM for Every Training Zone
Estimated maximum heart rate at age 73: 147 BPM (220 − 73 formula). Average resting HR for this age group is approximately 75 BPM. The five zones below define effective training intensity ranges.
5-Zone Heart Rate Chart — Age 73
Zone 1
Recovery
74–88 BPM
Active recovery, fat burning
55% max
Zone 2
Fat Burning
88–103 BPM
Aerobic base, fat oxidation
65% max
Zone 3
Aerobic
103–118 BPM
Cardiovascular fitness
75% max
Zone 4
Anaerobic
118–132 BPM
Speed and performance
85% max
Zone 5
Maximum
132–147 BPM
Elite training only
95% max
The 220−age formula has a standard deviation of ±10–12 BPM — meaning true max HR at age 73 could reasonably range from 135 to 159 BPM. For a more accurate estimate, a graded exercise test (GXT) is the gold standard.
To measure your heart rate: place two fingers on your carotid artery (side of neck) or radial artery (inside wrist) and count beats for 15 seconds, then multiply by 4. A chest strap heart rate monitor is the most accurate wearable method.