You've done an FTP test. You know your number. But knowing your FTP and knowing what to do with it are two completely different things.
Most cyclists get their FTP, plug it into an app, and follow whatever the app says. The ones who get genuinely faster understand what each zone actually does to their body — and more importantly, which zones they should spend most of their time in.
Here's the breakdown. No fluff. Just the stuff that works.
What Is FTP and Why Does It Matter?
Functional Threshold Power is the highest power you can sustain for approximately one hour. It's the line between aerobic and anaerobic energy production — the point where lactate starts accumulating faster than your body can clear it.
Your FTP is the anchor point for everything else in your training. Every session, every interval, every easy ride gets its intensity from this single number.
When I had Professor Stephen Seiler on the podcast, he put it simply: the purpose of knowing your FTP isn't to train at it. It's to know where everything else sits relative to it.
The 7-Zone Power Model
There are several zone models in cycling (3-zone, 5-zone, 7-zone). The 7-zone model gives you the most granular view of your training. Here's what each zone does and when to use it.
Zone 1: Active Recovery (Below 55% FTP)
This is genuinely easy. Easier than you think. If you're putting in any real effort, you're not in Zone 1.
What it does: Promotes blood flow and recovery without adding training stress. Flushes metabolic waste from hard sessions.
When to use it: Recovery rides the day after hard sessions. Warm-up and cool-down. Coffee spins.
The mistake: Skipping it. Many cyclists think easy riding is wasted time. It's not. It's what lets you go hard when it matters.
Zone 2: Endurance (56-75% FTP)
This is where the magic happens. And it's where most cyclists get it wrong.
What it does: Builds mitochondrial density, increases fat oxidation, develops your aerobic engine, expands capillary networks. This is the foundation of all endurance performance. Our complete Zone 2 guide goes deep on the science.
When to use it: The majority of your training volume. Professor Seiler's research shows elite endurance athletes spend roughly 80% of their training time here.
The mistake: Riding too hard. If you're breathing heavily, you're not in Zone 2. The conversation test works: if you can speak in full sentences, you're probably right. If you can only manage a few words, back off.
Zone 3: Tempo (76-90% FTP)
The controversial zone. Some coaches love it, others call it the grey zone.
What it does: Improves your ability to sustain moderate efforts. Builds muscular endurance. Has its place in specific training blocks.
When to use it: Structured tempo blocks (2x20 minutes), sustained climbing efforts, specific event preparation for long sportives.
The mistake: Spending too much time here by accident. If your easy rides drift into Zone 3 and your hard rides don't reach Zone 4+, you're stuck in the grey zone — too hard to recover from, too easy to stimulate real adaptation.
Zone 4: Threshold (91-105% FTP)
Your FTP zone. The bread and butter of cycling performance improvement.
What it does: Raises your lactate threshold — the power you can sustain for extended periods. Directly improves your FTP.
When to use it: Threshold intervals (2x20 min, 3x15 min, 4x10 min). The classic sessions that every serious cycling coach prescribes.
The mistake: Doing threshold work when you're fatigued. Quality matters more than quantity here. If you can't hold the target power cleanly, the session isn't doing what it should.
Zone 5: VO2max (106-120% FTP)
This is where breakthroughs happen. Hard 3-8 minute efforts that push your ceiling higher.
What it does: Increases your maximum oxygen uptake (VO2max) — the absolute ceiling of your aerobic capacity. When your VO2max goes up, everything below it feels easier. See our VO2max intervals guide for the exact protocols.
When to use it: VO2max intervals (4-6 x 4 minutes at 106-120% FTP with equal recovery). Hill repeats of 3-5 minutes. The sessions that hurt but deliver results fast.
The mistake: Going too hard too early in the interval and fading. The goal is to sustain the target power for the full duration, not to sprint and hang on.
Zone 6: Anaerobic Capacity (121-150% FTP)
Short, sharp, explosive. The top-end power that wins races.
What it does: Develops your anaerobic energy system. Builds the power for attacks, bridging gaps, and short climbs.
When to use it: 30-second to 3-minute max efforts. Race-specific preparation. Late-season sharpening.
The mistake: Prioritising this over aerobic development. Zone 6 work is the icing on the cake. Without a big aerobic base (Zone 2) and a strong threshold (Zone 4), there's nothing to ice.
Zone 7: Neuromuscular (150%+ FTP)
All-out sprints. Maximum force, maximum recruitment.
What it does: Develops neuromuscular power — the ability to recruit as many muscle fibres as possible in a short burst.
When to use it: Sprint intervals under 30 seconds. Standing start efforts. Race finishes.
The mistake: Training this when it doesn't serve your goals. If you're preparing for a gran fondo or a hilly sportive, Zone 7 work has minimal return on investment.
How to Structure Your Training Week
For a cyclist training 8-10 hours per week, here's what a well-structured week looks like:
Monday: Rest or 45-minute Zone 1 spin
Tuesday: Quality session — VO2max intervals or threshold work (Zone 4-5)
Wednesday: 1.5-2 hours Zone 2
Thursday: Quality session — tempo or threshold intervals (Zone 3-4)
Friday: Rest or easy 30-minute spin (Zone 1)
Saturday: Long ride, 3-4 hours Zone 2
Sunday: Group ride (mixed zones — counts as quality if it's hard)
The key principle: protect your easy days so your hard days can be genuinely hard. This is the polarised approach that Professor Seiler's research supports across all endurance sports.
Calculate Your Zones
Use our free FTP Zone Calculator to get your personalised 7-zone power table instantly. Enter your FTP and get exact wattage ranges for every zone. And if your FTP has stalled, read our guide on how to improve your FTP.
Key Takeaways
- Your FTP is the anchor point for all training zones — get it tested accurately
- Zone 2 (55-75% FTP) is where you should spend 80% of your training time
- Zone 4 (91-105% FTP) threshold work is the bread and butter of cycling improvement
- Avoid the grey zone — riding at Zone 3 by default is the most common amateur mistake (see sweet spot training for when Zone 3-4 work makes sense)
- Structure your week with 2-3 quality sessions and fill the rest with genuine Zone 2
- Quality beats quantity — if you can't hit the target power, the session isn't working
- Use the 7-zone model for the most granular view of your training
Frequently Asked Questions
What are FTP training zones?
FTP training zones are power-based intensity ranges calculated from your Functional Threshold Power. The 7-zone model divides effort from Active Recovery (Zone 1, below 55% FTP) to Neuromuscular Power (Zone 7, above 150% FTP). Each zone targets specific physiological adaptations.
How do I calculate my FTP zones?
First, determine your FTP through a 20-minute test (multiply result by 0.95) or a ramp test. Then apply zone percentages: Zone 1 (less than 55%), Zone 2 (55-75%), Zone 3 (76-90%), Zone 4 (91-105%), Zone 5 (106-120%), Zone 6 (121-150%), Zone 7 (greater than 150%). Use our free FTP Zone Calculator for instant results.
How often should I test my FTP?
Every 6-8 weeks is ideal. Testing more frequently disrupts training rhythm without providing useful data. Many modern platforms like TrainerRoad also detect FTP changes automatically through AI analysis of your workout data.
What is a good FTP for a cyclist?
FTP varies hugely by age, weight, training history, and genetics. For context: untrained adults might start at 150-200W, regular cyclists often sit at 200-280W, competitive amateurs at 280-350W, and World Tour professionals at 380-450W. Power-to-weight ratio (W/kg) is more meaningful than raw watts.
Why is Zone 3 called the "grey zone"?
Zone 3 (76-90% FTP) is too hard to properly recover from but not hard enough to produce significant high-intensity adaptations. Spending too much time here — which most amateur cyclists do by default — leads to chronic fatigue without proportional fitness gains. It's the most common training mistake in cycling.
