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Heart Rate Zones for Age 20: Max and Target Heart Rate
At 20, your estimated maximum heart rate is about 194 beats a minute (220 − age gives 200). Moderate exercise (50–70%) is roughly 100–140 bpm. See all five zones.
Heart rate zones for exercise
Know how hard you're working when you walk, run, cycle or swim.
Estimated max heart rate
Zone 1: Very light
97–116 bpm
Easy chat, warm-up and recovery
Zone 2: Light
116–136 bpm
Comfortable, you can still talk in full sentences
Zone 3: Moderate
136–155 bpm
Breathing harder, short sentences only
Zone 4: Hard
155–175 bpm
Only a few words at a time
Zone 5: Maximum
175–194 bpm
All-out effort, only for short bursts
Using your zones
- Most weekly activity can be in zones 2–3: health guidelines suggest at least 150 minutes of moderate activity a week.
- Short bursts in zone 4–5 build fitness but need rest days.
- Max heart rate formulas are averages; yours can be 10–15 beats higher or lower.
✅ Rules last checked:
📚 Official sources: American Heart Association: Target heart rates · Tanaka et al. 2001: Age-predicted maximal heart rate
We build every tool from the official rules and re-check them when they change. Always confirm with the official source before you rely on a result.
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Zones at age 20
At age 20, the estimated maximum heart rate is 194 bpm with the Tanaka formula, or 200 bpm with the simpler 220 − age.
The American Heart Association says moderate exercise is about 50–70% of your maximum and vigorous exercise about 70–85%. For you, that's roughly 100–140 bpm for moderate and 140–170 bpm for vigorous.
| Zone | Feels like | Beats a minute |
|---|---|---|
| 1 Very light | Easy chat, warm-up and recovery | 97–116 |
| 2 Light | Comfortable, you can still talk in full sentences | 116–136 |
| 3 Moderate | Breathing harder, short sentences only | 136–155 |
| 4 Hard | Only a few words at a time | 155–175 |
| 5 Maximum | All-out effort, only for short bursts | 175–194 |
Based on the Tanaka formula (208 − 0.7 × age). Formulas are averages: your real maximum can be 10 to 20 beats higher or lower. Some heart and blood pressure medicines lower your heart rate, so the zones may not fit you.
Questions people ask
What's a good heart rate for exercise?+
For moderate exercise, about 50–70% of your maximum heart rate. For vigorous exercise, about 70–85% (American Heart Association).
Which formula is best?+
220 − age is the classic. The Tanaka formula (208 − 0.7 × age) is based on a larger study and fits older adults better. Both are averages.
What's the resting heart rate for?+
If you enter it, the zones use your heart-rate reserve (Karvonen method), which adjusts for your fitness. Measure it in the morning before getting up.