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HOW MUCH ZONE 2 SHOULD CYCLISTS DO?

By Anthony WalshRoadman CyclingUpdated

WHO THIS IS FOR

IS THIS YOU?

The time-crunched amateur

You have 6–10 hours a week and want to know how to split them.

The rider who thinks easy is wasted

You feel like a slow ride isn't 'real' training and keep pushing the pace.

THE ROADMAN VIEW

The Roadman view

Here's what nobody tells you about pro cyclists: they spend about 80% of their time riding at a pace so slow that plenty of recreational riders could sit on their wheel. Anthony has said it on the podcast more than once, and Seiler's research backs it — the easy riding is not filler between the hard sessions. It is the training.

The problem is ego. Riding slow feels like you're not working, so amateurs nudge the pace up until their 'easy' ride is actually a moderate one. That grey-zone riding is the single most common error trained amateurs make. It feels productive and it quietly blocks progress, because it's too hard to recover from and too easy to drive real adaptation.

So the honest prescription isn't a magic number of minutes — it's a ratio and a discipline. Keep roughly four-fifths of your weekly time genuinely easy, hold your hard days for the 20% that's meant to hurt, and let duration do the work. Zone 2 isn't a session you tick off. It's the base everything else stands on.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

PRACTICAL APPLICATION

DO THIS WEEK

  1. Set your Zone 2 ceiling honestly

    Zone 2 is roughly 56–75% of FTP, or under ~75% of max heart rate. Use the lower half of that band. If your power meter says Z2 but you're breathing hard, trust your breathing and ease off.

  2. Make your long ride genuinely long

    One ride a week of 90 minutes to 3+ hours, all in Zone 2. Duration is the stimulus — the last hour of a long easy ride is where much of the aerobic adaptation happens.

  3. Protect the ratio

    Add up your weekly time. If more than ~20% is spent above Zone 2, you're doing too much intensity. Cut a hard session before you cut an easy hour.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

  • MISTAKERiding Zone 2 in Zone 3 because slow feels unproductive.

    FIXCap it by feel: conversational, nose-breathing pace. If you can only speak in short bursts, you're too high.

  • MISTAKEChopping Zone 2 into lots of short rides.

    FIXConsolidate the time. Longer continuous rides deliver more aerobic adaptation than the same minutes scattered across micro-sessions.

  • MISTAKETreating Zone 2 as optional once intervals start.

    FIXThe base is what lets you absorb and recover from intervals. Drop it and your hard sessions degrade within weeks.

FAQ

FREQUENTLY ASKED QUESTIONS

What heart rate is Zone 2 for cycling?
Roughly 60–70% of your maximum heart rate, or under your first ventilatory threshold — the point where you'd start breathing through your mouth. It's individual, so calibrate from a recent test rather than a generic formula.
Is 30 minutes of Zone 2 enough?
It's better than nothing and useful as a recovery spin, but 30 minutes is short for a true aerobic stimulus. Most of the benefit comes from rides of 60 minutes and up, where fat oxidation and mitochondrial adaptation are most strongly driven.
How many days a week should I do Zone 2?
For most amateurs, 3–5 of your weekly rides will be predominantly Zone 2, with 1–2 hard sessions. The exact count depends on your hours, but the ratio — about 80% easy — matters more than the day count.
Can I do too much Zone 2?
You can't easily over-train on easy riding, but you can under-stimulate if you never go hard. Zone 2 alone plateaus a trained rider. Pair the big easy base with a small dose of properly hard intervals.
Should I do Zone 2 indoors or outdoors?
Either works. Indoors is more controlled and time-efficient; outdoors is easier to sustain for the long durations Zone 2 rewards. Many riders find a 3-hour Zone 2 ride far more bearable outside than on a trainer.
Why do I feel like Zone 2 is too easy?
Because it is meant to feel easy — that's the point, and the ego struggle is normal. The work is happening at the cellular level even when the legs feel under-worked. Trust the process and save the suffering for your hard days.

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