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UNTAPPED with Spencer Matthews

The TRUTH About Zone Training

14 May 2026

Transcription

Chapter 1: What is the main topic discussed in this episode?

0.031 - 9.246 Spencer Matthews

I'm seeing the staff master general after this. Procession? Yeah. Is that where he goes to Victoria? Yeah. Is that London City Athletic? Yeah. City Athletic. Is it good?

0

9.927 - 14.775 Oli Patrick

Yeah. Gonna lift some weights with the staff man.

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14.795 - 19.162 Spencer Matthews

He's such a good bloke. He is a good human being.

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20.163 - 44.656 Oli Patrick

Can you eat too much protein? Nah. Can you remember when I sent you that? I thought because Sean used to do the equivalent of the extra mile. So I sent Ollie a message saying, is it possible to eat too much protein? I sent it to Sean as well just to see if there was a difference. And Ollie sent me this really scientific breakdown of like, yes, of course you can, but it's quite hard to do so.

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44.697 - 46.64 Oli Patrick

And Sean just went, nah.

47.321 - 51.768 Spencer Matthews

Have you told him that story?

51.788 - 52.048 Oli Patrick

No.

52.489 - 52.549

No.

58.773 - 80.504 Oli Patrick

Hello, everyone. Welcome to this week's episode of The Extra Mile with me, Spencer Matthews. And me, Oli Patrick. And today, we're going to be talking about zones, running zones. What are they? Why do we care about them? You know, we had Stephen Scullion on the main show. I'm going to stop calling it the main show. I think it is the main show. You know what? I love Extra Mile, right?

Chapter 2: What are heart rate zones and why are they important?

147.619 - 157.697 Spencer Matthews

Yeah, so running zones have historically been a way of trying to gauge which energy system I'm using to perform the task. So human beings are much like a...

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157.677 - 179.548 Spencer Matthews

an electric car which i could potentially use the prius as our early example that at relatively low combustion rates so when your prius is pulling out of the car park it's probably silent and then as it speeds down the a430 it would move from being a silent vehicle to a petrol powered vehicle because as it requires that higher speed it requires a different fuel mix and humans are the same.

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179.628 - 199.985 Spencer Matthews

So as we're running at low intensity, we can use a really efficient fuel, which is fat and oxygen to combust the energy that we are using now. So as you and I sit here now, you'd like to think, unless we've had some crazy glucose drink or some wild energy drink, we will be performing these energetic tasks of communicating and having a lovely time using fat and oxygen to generate fuel.

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200.486 - 213.218 Spencer Matthews

If we then started walking and then running faster and running faster, we get to a point where our body can't deliver that energy using that same fuel source. So it starts to subsidize the fat with a bit of carbohydrate, and it starts to lose some of the availability of oxygen.

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213.739 - 232.04 Spencer Matthews

And as our body moves from a really clean fuel without consequence, so we could sit here all day, it moves to feel like a dirtier fuel mix, which comes with consequence, most notably the byproduct of fatigue, which could be a change in the acidity of the muscles, this rise of lactic acid, which is often misappropriated as the cause of fatigue, but certainly correlates with fatigue.

232.06 - 256.163 Spencer Matthews

And the faster and harder the body works, the more I change the fuel mix and my ability to do that for a certain period of time. And someone basically stratified these into five zones, which theoretically correlate with my body moving from using aerobic and fat metabolism to carbohydrate anaerobic metabolism. I am working with sugar and no oxygen, having started with fat and oxygen.

256.143 - 273.025 Spencer Matthews

And the zones are sort of, you know, 50 to 60% of my maximum heart rate, which in itself is a debate, is zone one. 60 to 70% is this magical zone two. 70 to 80, zone three, often called the gray zone. 80 to 90 would be zone four, and 90 to 100 is zone five.

273.065 - 282.398 Spencer Matthews

So they're basically built there to try and help people theoretically work out which fuel source they're using against the objective of their training. That's quite the answer.

282.438 - 290.105 Oli Patrick

Yeah. I was expecting you to say something like, it's the heart rate at which you run at.

Chapter 3: What is Zone 2 training and why is it popular?

480.986 - 495.164 Oli Patrick

I think it's zone two that he ran it in. Zone two, sorry. He kept his heart rate at 130, I think, for the whole marathon. Just because he was pacing me. So, you know, it's kind of... It's a bit of fun for some people, isn't it?

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495.184 - 515.059 Spencer Matthews

It is, but you can't compare exertion. So, you know, one person running at a certain speed, the only way you can really think about zones is how it feels. So, you know, zone two, by its very definition, is staying below what is often called the sort of anaerobic threshold, when your body basically is going to be on borrowed time. So in zone two...

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515.039 - 526.127 Spencer Matthews

You're theoretically mostly... And when we look at these energy systems, there's never that you completely use fat and oxygen. You completely use sugar and no oxygen. So these systems are always blended.

0

Chapter 4: How do different heart rate zones affect energy sources?

526.668 - 544.799 Spencer Matthews

But if you and I are using fat and oxygen to run... We can run for a long time. Me more than you because I've got more fat than you, right? I've definitely got more fat. You know, so my ability to combust energy is basically, you know, nearly not unlimited. You know, I'll dehydrate. I'll have some central elements of fatigue creeping in.

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545.42 - 561.287 Spencer Matthews

But if I can do something in zone two, I can do it for a long, long time. Now, what I can do in zone two depends on how conditioned I am. So your zone two, what you can achieve, and again, comparing you to me, you running in zone two would be significantly faster than me running in zone two. But we would probably feel the same.

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561.989 - 579.817 Spencer Matthews

And that's the thing, when people see extraordinary tasks, when people see Tour de France cyclists cycling at 40 kilometers an hour, you know, they're like, oh my God, I can't imagine that. Because when you're at 40 kilometers an hour, you're in zone five. So they don't feel like you feel for two and a half hours, three hours, five hours. They feel like you feel when you're barely trotting.

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580.078 - 591.795 Oli Patrick

Well, we had Mo Farah in this studio who made the point that him running a flat out 5K and you or I running a flat out 5K is exactly the same in terms of exertion, right? It'll take us a few minutes more.

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591.975 - 593.097 Spencer Matthews

Yeah. It's worse.

593.117 - 595.34 Oli Patrick

It's harder. But yeah, exactly. We're out there for longer.

595.46 - 606.702 Spencer Matthews

Yeah. Yeah, yeah. I'm in zone four or five. for, you know, let's say around 20 minutes, definitely north of 20 minutes at the moment. You know, so he's doing that in, you know, what was he, 13?

606.722 - 609.087 Oli Patrick

I can't remember his PB, but yeah.

609.227 - 627.443 Spencer Matthews

So he's seven minutes less in the same degree of pain. And, you know, he'll have built much better tolerances to that pain. So, you know, theoretically, the average person... I want to give them their flowers. We are feeling pain at a greater level than some of these elite endurance athletes because we don't have great tolerance of it and we're enduring it for longer durations.

Chapter 5: How does individual fitness level affect heart rate zones?

1225.865 - 1247.492 Spencer Matthews

that's taking you into those upper limits. If you're high rocks or anything of an hour, you know, 20-minute burst, 30-minute burst, you need carbohydrate. And carbohydrate being avoided in the build-up to events is, it might help you look a little more, you know, chiseled on the beach, but it will be a detriment to performance for sure. But, you know, maybe.

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1247.512 - 1249.135 Spencer Matthews

I think it's because muscle glycogen stores water.

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1249.155 - 1250.316 Oli Patrick

I don't know why you're looking at me.

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1250.336 - 1252.699 Spencer Matthews

Because, you know, because you've already had your top off twice since I got here.

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1252.679 - 1266.34 Oli Patrick

I was showing you that there's children that burnt me. I won't name them out of respect for fellow businessmen, but bloody hell. It's happened to me a few times. I put it on. I don't know why I just don't chuck it out. I will.

1266.501 - 1273.65 Spencer Matthews

Yeah, I think, again, the key learning from this morning is if something irritates you, Not necessarily a person, but if a product irritates you.

1273.73 - 1275.712 Oli Patrick

If anything irritates you, chuck it in the bin.

1275.732 - 1293.008 Spencer Matthews

So your zone 2s are a great example of when someone does an awful lot of conditioning, they actually move the numbers. So your zone 2 would be predicted to be something about up to 128 beats per minute, but your zone 2 is somewhere between 136 and 146 beats per minute. So that's way higher.

1293.049 - 1301.873 Oli Patrick

Yeah, but like 128 beats per minute. I can't run at 128 beats per minute. No. Well, and again, you could if you run.

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