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If you told me back in 1996, when I started doing all this distance running stuff, that running fast could feel easy… I would not have believed you, but it’s true. And I did that with this low heart rate training method and I still do it to this day.
Watch above, read, or listen below to find out why I’m obsessed with improving my Zone 2 heart rate speed.

Why Zone 2 Training Might Be the Only Thing You’re Missing in Life (and Running)
I used to think the only way to improve was to go all out… on every run… every time. Sweat, struggle, repeat. Make sense because I was actually killing my gains before they even had a chance. Enter Zone 2 training—a simple, low heart rate approach that goes against everything I thought I knew. It’s low intensity but has with high impact on both my endurance and my sanity. If you want to actually get faster without wiping yourself out, Zone 2 might be your missing piece.
Enter Dr. Phil Maffetone and His Low Heart Rate Revolution
This is where Dr. Phil Maffetone comes into play—the guy who basically wrote the book on low heart rate training. His philosophy? Train slower to get faster aka the Maffetone Method and the MAF test. Sounds wild, but hear me out. Maffetone’s approach is all about building a solid aerobic base by keeping your heart rate low, like Zone 2 low. It’s like teaching your body to become an efficient, fat-burning machine without beating it to a pulp every session. When I stumbled upon his methods, it felt like I’d discovered a hidden shortcut in a game I’d been playing for years.
Endurance: Slow Down to Go the Distance
When I first tried Zone 2, I thought I was wasting time because to keep my heart rate low, I had to go super duper slow (more on that shortly). I was used to that feeling of being toast/fried at the end of a run. But this slower pace means I’m not gasping for air, not hating myself halfway through. I’m running a pace I could hold for hours if needed. Zone 2 has taught me to build endurance smartly, letting my body become an aerobic machine that doesn’t need to break down to build up. I’m legit lasting longer in races and in life—wild, though, eh?
Getting Through The Initial Phase
One of the downfalls of Zone 2 training is that it’s boring because you have to go so slow in the beginning. It does get faster, though. A lot of people think their zone 2 is higher because it’s so slow. No, it just means your aerobic fitness is poor. And a lot of people don’t like to admit that.
I first started Zone 2 training when I was the fittest I had ever been. I was riding, cycling, and swimming more than ever. But I was just going out at my “whatever” pace, aka Grey Zone. This didn’t really build up either side of my fitness. One side is an aerobic base, and the other is my Vo2 Max.
Zone 2 training allows me to technically build up both (with Vo2 Max fitness taking longer, but it does build it). Stick with it for eight weeks, and you’ll have more aerobic fitness than you’ve ever had in your life (and it lasts for a while even if you take a few days/weeks off, unlike top-end anaerobic speed).
Pushing vs Pulling Up Your Aerobic Threshold

Let’s talk about the two ways you can improve and raise up your aerobic threshold (which is your zone 2 heart rate speed) – the Zone 2 push-up and the Zone 3 pull-up. Think of it as building your engine so you can go longer and harder without falling apart like a cheap lawn chair.
Zone 2: The Push-Up (Long, Boring & Safe Way)
Zone 2 runs are your steady, “I’m-not-having-a-heart-attack” pace. They might not feel like much, but they’re basically laying the groundwork for your body to go the distance. When you run in Zone 2, your body gets better at using oxygen. Over time, it’s like adding horsepower to your engine. The science? You’re training your slow-twitch muscle fibers and improving mitochondria function – the little power plants in your cells. Do these runs consistently, and your aerobic threshold creeps up. Boom. You just pushed it up.
This way, as described before, is boring when you start. But it’s a safe way to build base which can actually improve your faster race times from 5k all the way up to Ultra-runs.
Zone 3: The Pull-Up (Fast, Somewhat Quick & Dangerous Way)
Then there’s Zone 3 – a notch up from Zone 2, where things start to get interesting. This is your tempo pace and is sometimes referred to as the Grey Zone. This is where you’re just on the edge of feeling the burn, but not quite redlining it. These runs are like yanking that aerobic threshold up by its collar and telling it to keep up. Science time: You’re increasing your lactate threshold here, which basically means you can go faster without your muscles whining about it. So, you’re pulling up your aerobic threshold by training your body to handle a faster pace with ease.
This way is much more dangerous if done too much. Think new runner who just runs in the Grey Zone to get a bit of a burn but not too much, and they have no base. They don’t really get too fit at anything after a few weeks and then just get injured.
The Magic Formula
Put Zone 2 and Zone 3 together, and you’ve got a recipe for building an aerobic threshold that lets you run longer and faster. It’s not rocket science, but it is solid physiology. Your body adapts to the demands you place on it. So, if you spend enough time cruising in Zone 2 and occasionally hit that Zone 3 gear, your aerobic threshold is going to climb – no motivational posters or fancy supplements needed.
Fuel Right, or Go Home
Zone 2 works best if you can fuel properly… at least, I think so. Some will argue until they turn blue that they can train and race fasted or low carb. I’m sure you can, but what if you could be 100% optimal with fueled runs vs 92% optimal on fasted/low-carb runs?
I used to skip out on proper nutrition, thinking I could just power through with some BCAAs and electrolyte pills and be “aight”. Nope. Now, I get my carbs, protein, and electrolytes because they actually help me with recovery. It’s either fuel right or feel like trash after the run—easy choice. It also keeps me consistent so I can show up for the next day’s workout and repeat it — This is where the real progress happens.
So yeah, that’s Zone 2 training for speed. It’s basically given me more time, more endurance, and way less pain. I’m not out here reinventing the wheel—just running smarter, not harder cuz that’s The 1% Better Runner way.
Timestamps From The Episode
- [00:00] – Introduction to the City Marathon Training Group
- [00:24] – Overview of Zone 2 Training for Endurance
- [01:05] – Goal Setting: The Maffetone Test
- [01:30] – Warm-Up Routine and Importance
- [03:14] – Sliding Into High Zone 2
- [05:11] – The Progression Pyramid and Its Benefits
- [07:38] – Understanding Zone 2 Efficiency in Training
- [09:30] – The Role of Specificity in Training at High Zone 2
- [13:16] – How Fueling Impacts Long Run Recovery
- [15:15] – Final Thoughts on the 1% Consistency Principle
Links
- What is the MAF Test?
- Watch & Read the episode here
- MAF Runs explained
- Norwegian Method – Jakeb Ingebrigsten’s Double Threshold Training Session
- The One Percent Better Runner Newsletter
- DLake Runs on Instagram





