Zone 2 gets all the attention, but the coach who sets training at one of the strongest teams in the World Tour thinks most riders are missing the zone underneath it. Vasilis Anastopoulos, head of performance at Astana, makes the case that zone 1 — riding so easy you can hold a flowing conversation — is the foundation everything else is built on. This is not junk mileage. It is the aerobic base that lets the famous fat-max rides and tempo sessions actually work. He laid out the full argument on Astana Coach on Zone 1 Training on the Roadman Cycling Podcast.
Key Takeaways
• Zone 1 sits around 55-60% of threshold — easier than traditional zone 2, and easy enough to chat the whole way • Easy riding is where you build mitochondria and aerobic endurance, the platform every harder session depends on • Skip the base and you get a quick rise in form followed by a sharp decline two to three months later • Progress to zone 2 only when aerobic decoupling is low and you have real accumulated time in zone 1 • Fat-max rides work, but cap them at twice a week and treat them as structured 20-30 minute blocks, not all-day efforts • Morning subjective feeling — how you slept, how you woke up — still beats any wearable score for daily decisions • Athlete buy-in matters: a happy, rested rider holds a plan together over years better than a perfectly numbered one
Why the Foundation Sits Below Zone 2
You have been told zone 2 is the magic zone. Every podcast and training article hammers the same message: if you want an aerobic engine, zone 2 is where it lives. Anastopoulos does not disagree that zone 2 matters — he disagrees that it comes first.
"During those easy rides, it's where you build your mitochondria. It's where you build your endurance," he told me. "You need those easy rides, the zone one rides, the long rides without stressing your metabolic system before going on zone two."
Zone 1 in his system sits around 55-60% of threshold — a notch below where most riders even put their easy days. These are rides where you can hold a real conversation, not the gasping kind where you snatch words between breaths, but genuine flowing talk.
The order is the whole point. Anastopoulos sees too many riders jump straight into zone 2 blocks without laying the foundation first, and he can predict what happens. "If you skip this step, the first step, one thing is for sure that probably you can see a rise in your performance. But then you are going to see immediately a decline. After two, three months, you will start asking what happened. The first month I was flying, I was going really well and now I cannot turn the pedals."
That pattern matches what I see in amateurs constantly. People get excited about structured training, jump straight to the threshold intervals and VO2max sessions, and wonder why they are cooked after six weeks. The missing ingredient is not more intensity. It is more easy.
How to Tell When the Base Is Built
The obvious question is how you know when the foundation is solid enough to build on. Anastopoulos points to two signals.
The first is aerobic decoupling — whether your heart rate stays tethered to your power across a long ride. When the base is thin, heart rate climbs away from power as the ride goes on; the engine is fraying. When the base is built, the two stay coupled for hours. The second is simply total accumulated time in zone 1. There is no universal number — each rider is different — but when he sees significant easy volume banked and good aerobic coupling, that is when a rider earns the move up to zone 2 and beyond.
For an amateur, the practical version is straightforward. If you can complete two to three hours of genuinely easy riding without your heart rate drifting and without being wrecked the next day, you have the platform. If a two-hour "easy" ride leaves you flat for two days, you do not yet — and piling threshold work on top of that will only bring the decline he describes forward.
This is also why the easy rides have to actually be easy. Ridden a little too hard, they stop building the base and start adding fatigue, which is the exact opposite of what the zone is for.
Where Fat-Max Fits — And Where It Goes Wrong
If you have studied power files from the strongest teams, you have noticed they are not all riding traditional zone 2. They are doing what gets called fat-max work — extended efforts just below tempo. Anastopoulos uses it too, but with a caveat that matters for amateurs.
"I am prescribing fat max rides but probably two times per week maximum, and then I'm working also on threshold and overunders and some really structured intervals," he explained. And rather than three-hour blocks at that intensity, he uses 20-30 minute blocks inside a longer ride. It is the difference between riding hard-ish for an entire session and using a targeted stimulus.
"I think the concept comes from the tempo rides that we used to do 10 years ago," he said. "A standard training program would be four hours with three times 20 minutes on tempo. So you just lower a little bit the watts and then you extend the period."
For amateurs this is where it gets dangerous, because fat-max sits right next to the grey zone — working hard enough to bank fatigue but not hard enough to earn the full adaptation. "You have to be really careful how hard you push the pedals immediately after you step out the door," he warned. If you are going to do fat-max work, treat it as the structured session it is: two of them a week, inside a plan that still prioritises easy volume. Do not ride "kind of hard" for hours because you think that is what the pros do.
The Metric That Still Beats the Wearables
Anastopoulos works with a data engineer who can run analysis in two minutes that used to take him hours — dissecting efforts, recovery between intervals, building precise race simulations. And yet the data point he trusts most is still subjective.
"At the end of the day, the question that the rider needs to ask every morning is how he feels," he said. "We can have the HRV, we can have the Whoop score, we can have the recommendation from our Garmin saying that you have to do an easy ride today. But we have seen that many times this is just off the line."
The morning check covers sleep, how the rider woke up, resting heart rate, even urine colour — but it resolves to one question: how do you feel? "As simple as that." If a rider says they feel terrible, that trumps a green recovery score every time. The craft is combining the numbers with the honest answer and years of pattern recognition.
That extends to athlete happiness, which he treats as a performance variable rather than a soft one. He discusses weekly plans with riders and stays flexible on timing and targets, because a rider who buys into the work and stays rested holds a plan together over years far better than one bolted to rigid numbers.
What This Means for Your Training
The lesson here is not to copy a World Tour rider's session list. It is to respect the order in which adaptations are built.
If you are returning from time off or building base fitness, start with genuine zone 1. It should feel almost embarrassingly easy — conversational, coffee-stop-friendly, with no anxiety about brief drifts into zone 2 on a climb. Bank real time here before you add structure, and judge readiness by aerobic decoupling and next-day freshness rather than the calendar. Our complete zone 2 guide maps out the next step once that base is in.
When you do add fat-max or tempo work, treat it as structured training: two sessions a week at most, with clear targets and real recovery around them. The amateur trap is making every ride moderately hard because that feels like "doing the work." It is the fastest route to the plateau Anastopoulos describes.
And pay attention to how you feel. The morning questions — how did you sleep, how is your motivation, how did you wake up — carry more useful signal than most devices. Use the data to inform decisions, not to override common sense.
If you have been doing the easy work and the gains still are not showing up, the limiter may sit elsewhere — how your easy and hard days are actually distributed, or how recovery is interacting with the load. The Plateau Diagnostic looks at your training, recovery and progression together and shows you where the real constraint sits. Three minutes. Free.