CoachingAnswer

WHAT HEART RATE IS ZONE 2 FOR CYCLING?

By Anthony WalshRoadman CyclingUpdated 26 May 2026

ANSWER

Zone 2 heart rate for cycling typically sits at 60–72% of your maximum heart rate — roughly 114–137 bpm for a rider with a 190 bpm max. The more precise marker is staying below your first ventilatory threshold: the point where you shift from nasal breathing to mouth breathing. Generic age-based formulas are a rough start; a short field test gives you a far more accurate ceiling.

KEY TAKEAWAYS

Zone 2 HR is roughly 60–72% of maximum heart rate, but the talk test is a practical daily check.
Maximum heart rate declines with age, so the same percentage feels different at 40 vs 25.
Temperature, caffeine, dehydration, and fatigue all inflate heart rate — on hot days, ride by power or RPE instead.
The ventilatory threshold test — finding the point where you shift to mouth breathing — gives you a more accurate Zone 2 ceiling than any formula.

WHO THIS IS FOR

IS THIS YOU?

The heart rate monitor user

You train by HR, not power, and want to know exactly what numbers to target.

The rider whose HR drifts during long rides

Your heart rate climbs through a flat Zone 2 ride and you're unsure whether to slow down or trust the power.

THE ROADMAN VIEW

The '220 minus age' formula for maximum heart rate is one of the most widely cited numbers in cycling — and one of the least reliable for individual riders. Anthony has seen athletes with maximum HRs 20 bpm above or below the formula's prediction. If your Zone 2 ceiling is built on a wrong max, every training zone you've ever set is shifted.

A better approach: find your actual maximum heart rate with a proper ramp test or a short all-out effort, then set your Zone 2 ceiling at 70–72% of that. Cross-check it with the talk test — if you can speak in complete sentences without forcing it, you're in the right place. If you can only manage short phrases, you're above Zone 2.

There's also a daily drift problem. On a hot day, at altitude, or when you're under-slept, your heart rate at the same power output can be 10–15 bpm higher than normal. This is cardiac drift, and it means your Zone 2 power on Wednesday might push your HR above the Zone 2 ceiling. The fix is to learn both markers — power tells you the physiological load, HR tells you how your body is responding to today's conditions.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

Professor Stephen SeilerExercise physiologist, polarised-training researcher
Seiler's polarised training model uses ventilatory thresholds — not arbitrary HR zones — to define training intensity. The first ventilatory threshold, where breathing shifts from nasal-dominant to mixed, is the upper limit of what he calls 'truly easy' training. Working below that threshold is the defining characteristic of Zone 2.
Hear it: Secret To Cycling Fast At A Low Heart Rate | Prof Seiler
Dan LorangHead of Performance, Red Bull–Bora–Hansgrohe; coach to Jan Frodeno and Primož Roglič
Lorang's prescription for amateur riders emphasises individual calibration over generic zone calculators. The key metric is finding the metabolic state where fat is the dominant fuel — which is precisely what the lower half of Zone 2 targets. He uses this as the baseline for all base-phase building blocks.
Hear it: 13 Years Of Coaching Pros: What Amateurs Don't Know

PRACTICAL APPLICATION

DO THIS WEEK

Run a simple max HR test
After a 15-minute warm-up, ride 3 minutes all-out on a climb. Record the peak HR. This is closer to your true max than any formula. Set your Zone 2 ceiling at 70–72% of that number.
Apply the talk test as a daily calibration
Every 15 minutes during a Zone 2 ride, say a sentence out loud. Full, comfortable sentence without pausing for breath? You're in Zone 2. Short bursts only? Back off 5–10 watts until breathing is easy again.
Adjust Zone 2 ceiling for heat and fatigue
On hot days or after poor sleep, use power as your primary guide and accept that HR will be higher than your Zone 2 ceiling even at the right power. Don't slow down to hit the HR target — hold the power and let the HR be a signal, not a limiter.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

MISTAKEUsing the '220 minus age' formula and never questioning it.
FIXTest your actual max HR before setting any zones. Generic formulas can be off by 15+ bpm, which shifts every training zone you have.
MISTAKELetting HR drift decide when to stop a Zone 2 ride.
FIXCardiac drift during a long ride is normal. Slow down only if power is also climbing. If power is steady and HR is rising slightly, that's expected physiology, not a sign to stop.
MISTAKEIgnoring conditions that push HR above Zone 2 at Zone 2 power.
FIXHeat, altitude, illness, and caffeine all affect HR. On a hot day, anchor to power or RPE and accept a higher HR reading.

FAQ

FREQUENTLY ASKED QUESTIONS

What is a typical Zone 2 heart rate for a 45-year-old cyclist?

With an estimated max HR of 175 bpm (roughly 220 minus 45), Zone 2 would sit around 105–126 bpm. But measured max HRs at 45 vary from 160 to 195 bpm, so test yours before trusting this number. The talk test is your daily fallback.

Why does my heart rate in Zone 2 seem higher than other riders my age?

Maximum heart rate is highly individual and doesn't predict fitness. A higher max means all your zones sit at higher absolute numbers than a rider with a lower max, even if your relative fitness is identical. Compare percentages, not absolute bpm.

My heart rate climbs throughout a Zone 2 ride even though I'm not going faster — is that normal?

Yes. This is cardiac drift, caused by increasing core temperature, dehydration, and cardiovascular stress accumulating over time. A drift of 5–10 bpm over a 2-hour ride is normal and expected. Extreme drift (15+ bpm) suggests dehydration, heat, or accumulated fatigue.

Is Zone 2 heart rate the same on a bike as running?

No. Running typically produces 5–10 bpm higher heart rates than cycling at the same perceived effort, because running uses more muscle mass. Your Zone 2 power-to-HR relationship on the bike won't translate directly to a treadmill.

Should I use power or heart rate for Zone 2?

Both, as different signals. Power tells you the actual training load; HR tells you how your body is adapting to today's conditions. On a normal day, calibrate using HR. On hot or high-fatigue days, defer to power and accept elevated HR.

RELATED EPISODES

HEAR THE CONVERSATIONS

How To Cycle Fast With A Low Heart Rate

Why Heart Rate Is High Cycling | Roadman Podcast

Secret To Cycling Fast At A Low Heart Rate | Prof Seiler