Power training zones explained: what each one is for and how to use it
Knowing your FTP is step one; knowing what to do with it is step two. Power zones turn a single number into a map of intensities: each zone trains a different aspect of your physiology, feels a certain way and suits a particular kind of session. This guide walks through the seven zones of Coggan’s model, with sensations, purposes and example sessions for each.
Where the zones come from
Each zone is a range expressed as a percentage of your FTP, the power you could, in theory, sustain for about an hour. With an FTP of 250 W, for example, Z2 runs from roughly 140 to 188 W. If you have not measured yours yet, start there: zones are only as reliable as the FTP they rest on.
Z1 · Recovery: under 55%.
Z2 · Endurance: 56–75%.
Z3 · Tempo: 76–90%.
Z4 · Threshold: 91–105%.
Z5 · VO2max: 106–120%.
Z6 · Anaerobic capacity: 121–150%.
Z7 · Neuromuscular: maximal efforts of a few seconds, with no fixed percentage.
The seven zones, one by one
Z1 · Recovery
How it feels: you pedal without effort, talk completely normally and almost have to hold yourself back. What it is for: active recovery and loosening up the legs after a hard day. Typical session: 30–60 minutes on flat roads with a light, spinning cadence. The challenge here is restraint: going harder does not add, it subtracts.
Z2 · Endurance
How it feels: a comfortable, sustainable pace with calm breathing; you can hold a conversation in full sentences. What it is for: building your aerobic base, meaning more efficiency and a greater ability to stay on the bike for hours. Typical session: long rides of 1.5 to 4 hours at a steady effort or, midweek, 60–90 minute spins. It is the zone that takes up the most time in almost any serious plan.
Z3 · Tempo
How it feels: "comfortably hard". Your breathing has a rhythm, you speak in short sentences and you would not fancy holding it for four hours. What it is for: endurance at a brisk pace, useful if you are preparing for long events or sportives. It is quite tiring for what it gives, so use it in moderation. Typical session: 2×20 minutes at 80–85% with 5 easy minutes between blocks.
Z4 · Threshold
How it feels: hard but controllable; deep, steady breathing and only single words come out. What it is for: raising the power you can sustain, in other words, raising your FTP. Typical session: 2×20 minutes, 3×12 or 4×8 at 95–100% with about 5 minutes of recovery between blocks. Accumulating 30 to 60 minutes in the zone is typical.
Z5 · VO2max
How it feels: your breathing shoots up from the second minute and your legs burn at the end of each interval. What it is for: raising your aerobic ceiling, the maximum amount of oxygen your body can use. Typical session: 5×4 minutes at 110–115% with 4 easy minutes in between. People usually accumulate 15 to 25 minutes in the zone; more is not normally better.
Z6 · Anaerobic capacity
How it feels: clear pain in the legs, you cannot think about anything else and the effort can only be held for moments. What it is for: tolerating and recovering from short, intense efforts such as attacks, short climbs or surges in a group. Typical session: 8×1 minute at 130% with 3 minutes of recovery. Intervals last from 30 seconds to roughly 3 minutes.
Z7 · Neuromuscular
It has no fixed percentage: it is simply the most you can give for 5–15 seconds. How it feels: pure explosiveness, more about recruitment than fatigue. What it is for: peak power, sprinting and accelerations. Typical session: 6–8 sprints of about 10 seconds with 3–5 minutes of full recovery, always on fresh legs. Quality rules here: if your power drops, stop.
How to spread them across your week
There are two widely discussed approaches. In polarized training, most of your time (around 75–80%) is spent in Z1–Z2, very little in the middle zone and the rest, around 15–20%, in Z5 or above. In pyramidal training, easy riding also dominates, but a moderate volume sits in Z3 and less in Z4 and above, forming a pyramid.
The evidence is not conclusive about which works better for everyone, and the percentages are only a guide. What both models share is the important part: most of the volume is easy, and the hard sessions are few and high quality. A practical rule is two intense sessions per week and everything else in Z1–Z2. If you are just starting out, mostly Z2 and a single quality session is plenty.
Heart rate and feel as a backup
Power is instant; heart rate responds with a lag of a minute or two, drifts upward in long efforts and is affected by heat, sleep or caffeine. That makes it poor for short intervals but a good support on steady rides in Z1 to Z3.
Feel counts too. On a 1–10 perceived exertion scale, roughly: Z1 is a 1–2, Z2 a 3–4, Z3 a 5, Z4 a 6–7, Z5 an 8–9 and Z6 a 9–10. Checking these against your watts teaches you to recognise each zone, so you can still train sensibly when the power meter fails or runs out of battery.
Common mistakes
Living in the "grey zone": riding mostly in Z3 tires you out without giving the stimulus of a threshold session or the recovery of a Z2 ride.
Recovering too hard: if your easy days are not easy, your hard sessions suffer.
Using an outdated FTP: if you have improved, your zones are too low. Remember to retest every 6–8 weeks.
Intervals without enough recovery: especially in Z5–Z7, where rest is part of the work.
Next step
Pick one session of each type and try it with your real watts. In Cyklot you can create or browse structured workouts: the profile of each one colours the steps that have a target in % of FTP according to their zone, so you can see at a glance how the effort is distributed.