How do I accurately measure my maximum heart rate?

The most accurate test is a maximum effort test: warm up 15 minutes, then run uphill progressively for 3 minutes at maximum effort. Your highest recorded HR is your HRmax. You can also use data from intense workouts where you felt at your limit.

Which method is best for calculating HR zones?

The Karvonen method is the most individualized as it considers your resting HR. For athletes with known HRmax (from testing), use zones based on percentage of actual HRmax, not estimated.

Why should most training be in zone 2?

Zone 2 builds the aerobic base without accumulating excessive fatigue. Studies show elite athletes spend 80% of time at low intensity. This is where the greatest mitochondrial adaptation occurs.

High HR at easy pace — is that a problem?

Yes, it may indicate overtraining, dehydration, heat, or simply running too fast. Reduce pace until HR is in the target zone, even if that means very slow jogging at first.

Calculate your HR zones.

Discover your ideal HR zones to maximize each type of training.

Your age

Resting HR (optional)

Measure when you wake up, still lying down. Leave blank for simple method.

Calculation method

Estimated Max HR:187 bpm

Your training zones

Zone 1 — Recovery

94–112bpm

Active recovery. Facilitates recovery between intense workouts.

Zone 2 — Light Aerobic

112–131bpm

Aerobic base. 70-80% of total training volume should be here.

Zone 3 — Moderate Aerobic

131–150bpm

Moderate aerobic. Improves cardiovascular efficiency.

Zone 4 — Threshold

150–168bpm

Anaerobic threshold. Tempo run workouts and race pace.

Zone 5 — VO2max

168–187bpm

Maximum effort. Short intervals for VO2max development.

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Calculation methods.

Simple Formula

Max HR = 220 - age. Quick and widely known, but with ±12 bpm margin of error. Good for beginners.

Tanaka Formula

Max HR = 208 - (0.7 × age). Developed based on study with 500+ people. More accurate, especially for those over 40.

Karvonen Method

Uses Heart Rate Reserve (HRmax - HRrest). Zones are calculated over this reserve, making them individualized. The most accurate of the three.

Sync with your watch.

With Magic Training, your training plans are synchronized directly with Garmin, Polar and Suunto. Each workout includes the target HR zone for that day.

No more guessing pace — your watch alerts you when you leave the programmed zone.

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