Training Zones For Cycling Explained

Have you ever heard folks talking about training in “zones” and been confused what the heck they were talking about?!? In this article I’ll break down what training zones are and how you can use them to transform your riding.

Whether you’re looking to tackle longer rides, get faster, or simply feel stronger on the bike, understanding and using training zones is a game-changer. As a cycling coach, it’s the first thing I teach my athletes to make sure they are getting the most of their workouts and keep them from wearing themselves out.

What Are Training Zones?

Training zones are different intensity levels that correspond to specific physiological responses in your body. Think of them like gears on your bike – each one serves a particular purpose, and knowing when to use them makes your riding more efficient.

As a coach, I typically use a five training zone system with my athletes, as it provides clear and simple guidance. More advanced athletes might choose to further break down Zone 5 into subcategories (Zone 5a, 5b, and 5c or Zone 5+6), but for most recreational cyclists, five zones provide the right balance of simplicity and effectiveness.

The chart below is based off of Joe Friel’s HR and Andy Coggan’s Power training zones* but simplifies zone 5.

Why Use Training Zones?

Many riders fall into the “kinda hard all the time” trap, heading out for every ride and pushing themselves to a moderately uncomfortable pace. While this might feel productive, it actually limits your progress.

What happens when you ride sorta-hard all of the time? You don’t end up pushing a pace hard enough to make real gains, and you also don’t ride a pace that allows your body to recover.

Using training zones allows you target specific areas of improvement (speed or endurance), gives your body a chance to recover, and helps you make measurable progress toward your goals. When you understand zones, you can make every ride purposeful rather than just riding hard and hoping for the best.

Three Ways to Measure Your Zones

Training zones can be determined using perceived exertion, heart rate, or power output. I’ll explain how to actually determine your zones for each in a moment, but here’s when or why you might want to use one method over another.

Perceived Exertion (RPE)

Most folks starting out are best served by using perceived exertion. This is the most accessible method, requiring no equipment. You simply rate your effort on a scale of 1 to 10 based on how you feel.

Perceived exertion, while not as scientific as heart rate or power, is surprisingly accurate. It is also simple–it’s straightforward and easy to understand, and doesn’t require a heart rate monitor or power meter.

Finally, I like using perceived exertion as it requires you to become more attuned to your body.

Of course, the drawback of using perceived exertion is that it doesn’t provide precise, quantifiable data. This lack of precision can make it difficult to track progress.

Even if you do choose to use one of the other methods (heart rate or power), I always encourage my athletes to pay attention to their perceived exertion as well. It’s important to learn what your body is telling you rather than just relying on a computer.

Heart Rate

Using a heart rate monitor adds objectivity to your training. Heart rate zones are calculated as a percentage of your lactate threshold heart rate (LTHR) (more on that shortly).

Heart rate monitoring is relatively affordable and provides good feedback about cardiovascular strain. That said, it can lag behind actual effort and is affected by factors like temperature, hydration, and stress.

(If you’re looking for a heart rate monitor, our team loves the Garmin Venu).

Power

Power meters provide the most precise measurement of your work output, with zones based on percentages of your Functional Threshold Power (FTP). While power meters are the most expensive option, they offer immediate, accurate feedback regardless of external conditions.

Understanding Each Training Zone

Active Recovery (Zone 1)

This is your easiest riding, used for recovery between hard workouts or during the first part of your warm-up. In this zone, you should be able to hold a full conversation easily.

While it might feel too easy, time spent here helps your body recover and adapt to training stress.

Endurance (Zone 2)

The majority of your time training should be spent in Zone 2. This is a shocker to most folks who think they should be pushing hard all of he time.

In reality, the moderate intensity in Zone 2 builds aerobic endurance and fat-burning capacity without accumulating significant fatigue. That means you can do a lot of it!

The earlier you are in the season, or the longer your target events are, the more time you will spend here.

Tempo (Zone 3)

Tempo riding bridges the gap between endurance and threshold training. This “comfortably hard” intensity improves your body’s ability to process lactate and sustain longer efforts.

While valuable, limit Zone 3 work to 10% or less of your total training time to avoid overtraining. Most cyclists left unchecked will end up spending the majority of their time here.

Lactate Threshold (Zone 4)

Training here improves your body’s ability to process lactate and increases your sustainable power. This is where we start to make gains in terms of speed.

Time in Zone 4 should be carefully planned. We use Zone 4 primarily in interval workouts like hill repeats.

VO2 Max (Zone 5+)

The highest intensity zone encompasses VERY hard intervals where we are giving our max effort.

While crucial for developing top-end speed and power, time in Zone 5 should be limited to very short efforts and should only be attempted when well-rested.

Completing A Functional Threshold Test

If you are going to be training with a heart rate monitor or power meter (or on a smart trainer that measures power output), you’ll want to complete a functional threshold power (FTP) or functional threshold heart rate (FTHR) test in order to determine your training zones.

Make sure you are well rested, fed, and hydrated before doing the test. It’s best to complete it indoors on a trainer, but if you don’t have one or prefer to ride outside, choose a paved or gravel road that is flat or a gradual climb, is devoid of traffic lights, and has no steep climbs or descending.

Here’s how to do the test:

Warm-Up: Start with a 20 minute warm-up, including a few short bursts of high-intensity effort.
Main Effort: Ride as hard as you can sustain for 20 minutes. It’s crucial to pace yourself to avoid burning out too early. The goal is to find the highest power output you can maintain consistently.
Cool Down: Finish with a 20 minute easy spin to aid recovery.

Your average power during the 20 minute main effort is a good estimation of your FTP, and your average heart rate during that same period is a good estimation of your FTHR.

You can then use this info to determine your training zones. If you’re using a tool like TrainingPeaks, it can calculate your zones for you based on the results of this test. Otherwise, use the info below to manually calculate them.

Calculating Training Zones

1. Active Recovery (Zone 1)

Perceived Exertion: Feels very easy and comfortable. You can hold a conversation without any effort. Feels like a 1-2 on a scale of 1 to 10.
Heart Rate: Less than 81% of your Functional Threshold Heart Rate (FTHR).
Power: Less than 55% of your Functional Threshold Power (FTP).

2. Endurance (Zone 2)

Perceived Exertion: Still comfortable, but slightly more effortful than active recovery. Conversation is easy. Feels like a 3-4 on a scale of 1 to 10.
Heart Rate: 81-88% of your FTHR.
Power: 56-75% of your FTP.

3. Tempo (Zone 3)

Perceived Exertion: Moderate effort; talking is possible, but requires some effort. Feels like a 5-6 on a scale of 1 to 10.
Heart Rate: 89-93% of your FTHR.
Power: 76-90% of your FTP.

4. Lactate Threshold (Zone 4)

Perceived Exertion: Feels hard; speaking is possible in short phrases. Feels like a 7-8 on a scale of 1 to 10.
Heart Rate: 94-99% of your FTHR.
Power: 91-105% of your FTP.

5. VO2 Max (Zone 5+)

Perceived Exertion: Very hard; speaking is limited to a few words at a time. Feels like a 9-10 on a scale of 1-10.
Heart Rate: 100%+ of your FTHR.
Power: 106-120% of your FTP.

Where Should You Spend Most of Your Time?

The biggest mistake I see riders make is spending too much time in zone 3. Research and experience show that about 80% of your training time should be spent in Zones 1 and 2 combined. This might feel too easy at first, but this low-intensity work builds your aerobic engine and allows you to handle harder efforts when they count.

The remaining 20% should be split between Zones 3-5, with the exact distribution depending on your goals and the time of season. A good coach can help you with this.

Adapting Zones as You Progress

Your training zones aren’t static – they should be reassessed every 6-8 weeks or when you notice significant changes in your fitness. Signs that it’s time to retest include feeling like your zones are too easy, seeing consistently lower heart rates for the same effort, or noticing that you can’t reach your usual numbers. Regular retesting helps ensure your training remains effective as you get fitter.

Remember that zones are guidelines, not strict rules. Some days you might feel great and be able to push harder numbers at a lower heart rate. Other days, you might struggle to reach your usual zones. This is normal, and learning to adapt your training based on how you feel is part of becoming a better cyclist.

Looking For A Structured Training Plan?

Want to incorporate training zones into your riding but unsure how to do it? My pre-made or custom training plans are great for folks who are ready for a little more structure to make the most of their time on the bike.

Whether you’re just looking to gain fitness or you want to tackle a big event or race, one of my training plans can help! Shop here.