Intensity that earns its place.

Not all intensity is equal.

Right. You've built the engine. The aerobic base is there. Now you want to add intensity. And this is where most people go wrong.

Not because they pick the wrong intervals, although some do, but because they add intensity without a clear reason for it. They saw a workout on YouTube. Their mate told them about 30/30s. They read that sweet spot is the most efficient way to train. And they just, do it. No connection to what their body needs. No awareness of where it fits in their development. Just intensity for the sake of intensity.

Every workout in your plan should earn its place. It should be there for a reason, because it addresses a specific limiter, because it develops something that matters for your goals, because the signals say you're ready for it. If you can't explain why you're doing a session, you probably shouldn't be doing it.

So let me walk you through the workouts that I come back to, why I chose them, and, just as importantly, when NOT to use them.

The hierarchy.

I think about workouts in a hierarchy. And the hierarchy is determined by impact per hour, because that's what matters. You want the sessions that give you the most adaptation for the time you invest.

At the top: long endurance rides. I know I just said we're adding intensity, but the long ride is still the most important session in any week. It's where durability lives. It's where the aerobic system deepens. And with the durability dial, it's also where you can layer in fatigue-state work. If you can only do one long ride a week, protect it. When researchers tracked Norwegian world-class skiers from their best junior season to their best senior season, total training went up 35% over about eight years. The increase was almost entirely low-intensity volume. High-intensity hours didn't change at all. The way you get better over years is more base, not more intervals.

Next: threshold intervals. Sustained efforts at or near CP. These are the sessions that move the needle on your sustainable power. And there's a reason I keep coming back to longer intervals, ten minutes, twelve minutes, fifteen and up, rather than short efforts. Longer intervals accumulate more time at the intensity that drives adaptation. Three by twelve minutes at CP gives you thirty-six minutes of threshold work. Six by one minute gives you six. Same perceived effort, completely different training stimulus. And the progression is simple: 3x10, then 3x12, then 2x15, then 3x15, then 2x20. You're adding total time at threshold each step. Work-to-rest ratio around 2:1, so a twelve-minute effort gets five to six minutes recovery. Enough to reset, not enough to fully recover.

And how do you know when you're ready to progress? On your final interval, don't stop at the clock. Ride until the power drops off, five percent sustained drop and you're done. If you're consistently going well beyond the prescribed duration on that last rep, you're ready for the next step. If you're barely completing it, stay where you are. This is what I call adaptive interval training. The final rep is open-ended, and it's your diagnostic. It tells you where your capacity actually is right now, not where your plan assumes it is. It's the same signal-based logic applied within the session itself.

Then: VO2max work. This is where it gets interesting, because there are a lot of ways to do this, hard-start intervals, steady-state long efforts, 30/15 Rønnestad style, and people will argue about which is best. Odden showed in 2024 that the key variable is how much time you spend at a high fraction of your VO2max during the session. That's it. The format that gets you there depends on the rider. Short intervals, 30 seconds on, 15 off, let you sustain a higher average power at the same perceived effort, so for some riders they accumulate more time near the ceiling. Longer efforts, four by eight minutes, work through sheer duration at high intensity. Fast-start intervals, thirty seconds hard then settle, spike the oxygen demand early and hold it there. They all work, but they're not equivalent for every rider. The one that gets your heart rate and power both near their ceiling for the most total time, that's your format. And personality plays into this as well. If you genuinely prefer one format over another, you'll likely perform better in it, and there are real differences beyond just preference, like the extra neuromuscular stimulus you get from repeated sprint-style intervals versus steady-state efforts. That doesn't mean you ignore the other formats, but knowing which one is your bread and butter matters.

Then: anaerobic work. Efforts in the one-to-three-minute range, well above CP. This is where you're deliberately draining W prime, building the capacity to produce and tolerate high power outputs that can't be sustained. Think repeated hard efforts with incomplete recovery. This sits between VO2max work and sprints because it bridges the gap. It's not about the ceiling of your aerobic system and it's not about pure neuromuscular power. It's about the ability to go deep, repeatedly, and recover enough to do it again. For riders who need to attack, bridge gaps, or survive surges, this is where that capacity lives.

After that: sprint and neuromuscular work. Short, maximal efforts. These have their place, especially for riders whose left side of the power curve is underdeveloped. But for most riders, sprints are dessert, not the main course. They sharpen what's there. They don't build the engine.

This is not the only valid hierarchy. Other coaches prioritise differently, and that's fine. I've arrived at this order because it reflects what I've seen work for the riders I coach, mostly 30 to 55, mostly training 6 to 12 hours a week, mostly balancing cycling with the rest of their lives. For a full-time athlete with unlimited recovery, the order might be different.

The research supports longer intervals for threshold development. Laursen and Buchheit's framework is the backbone here. But I'm not dogmatic about it. If a rider responds better to shorter, more frequent efforts, we use those. The signal matters more than the prescription.

There are 6,198 possible HIIT combinations when you factor in work duration, rest duration, intensity, number of repetitions, and recovery type. You don't need to try them all. Coates' 2023 meta-analysis found no intensity-specific effect on time trial performance or peak power. As long as intervals are above CP and total volume is sufficient, the specific prescription matters less than consistency. You need to find the three or four that work for your physiology, your schedule, and your personality, and use them consistently.

Rider-type workouts.

I match workouts to rider type, but really, I'm matching workouts to limiters. A session isn't only for one kind of rider. It's prescribed because the limiter it addresses is most relevant for that rider right now. The point is specificity of development, not labelling. And just as important as what you do is what you don't do, because rider type also determines what will tire you unnecessarily. (If you haven't pinned down your rider type yet, that's in the power-duration curve chapter. The quickest tell is where your power curve is strongest relative to your threshold.)

Sprinter guidelines. More fast-twitch fibre dominance. Sprinters fatigue faster during repeated high-intensity sessions and are more sensitive to overreaching from volume. The practical rules: decrease total training volume relative to other types, increase recovery between intense sessions, and, this is the big one, don't give them long steady-state threshold intervals. Twenty minutes at sweet spot will tire a sprinter unnecessarily. Stick to shorter, sharper work and keep endurance days genuinely easy.

Puncheur guidelines. Similar fibre profile to a sprinter, but with more aerobic engine behind it. Puncheurs can handle more threshold work than a pure sprinter, but they still don't thrive on long, grinding steady-state efforts. Their bread and butter is repeated efforts above CP with incomplete recovery. Attacks, bridges, surges.

Climber guidelines. The opposite end of the spectrum. More slow-twitch dominant, clears lactate more efficiently during sustained work, and tolerates higher training volumes. Increase total hours, shorten the gap between hard sessions, climbers absorb the work. But watch the lactate production rate. Climbers want it low enough to sustain threshold, but not so low they can't respond to a surge when it comes. There's a fine-tuning process there.

All-Rounder guidelines. Sit between the two extremes, and that means they have to experiment. What suits a climber's recovery profile might bury an all-rounder. What works for a sprinter might leave them undertrained. Test work-to-rest ratios, session density, recovery duration. Find what your body responds to. There's no shortcut.

Neuromuscular Long Sprints, built for sprinters, prescribed to everyone else. Long sprints (15 to 20 seconds) from a near-standing start. Big gear, low cadence to start, build to max. These develop the neuromuscular system, the force production a true sprinter is born with. Which is exactly why I rarely prescribe this to sprinters. I use it for climbers and all-rounders who are weak on the left side of their curve.

2x20 Hard Finish, the All-Rounder session. Twenty-minute threshold efforts with the last five minutes at 105 to 110% CP. Yes, this is more demanding than the steady sweet-spot work that would bury a sprinter. All-rounders can absorb it, and they need it, because their races are decided in the final kilometres, not the sprint. It trains the ability to push when you're already deep.

Lactate Shuttle (3x9min), the Climber session. Nine-minute efforts alternating between just above and just below CP. The name reflects the mechanism, training the system to shuttle lactate from where it's produced to where it can be used as fuel, under sustained load. That's climbing. Every climb has micro-surges, and the rider who clears lactate fastest holds the wheel longest.

90-Second Repeats, the Puncheur session. Repeated ninety-second efforts at 120 to 130% CP with short recovery. This trains W prime reconstitution, the ability to go above threshold, recover partially, and do it again. That's attacking. That's the move at three k to go.

When to add, when to stop.

This is the part that most training plans get wrong. They tell you what workouts to do but not when to stop doing them.

The same principle from the apply/observe framework applies here: the block runs until the signal says it's done, not because the calendar says it's done.

It works the same way with intensity blocks. You start with an intent, improve threshold power, develop VO2max capacity, build sprint. You apply the work. And then you watch.

If the power numbers are responding, the heart rate pattern makes sense, and the RPE isn't climbing disproportionately, keep going. The signal says there's more adaptation to be had.

If the power stalls, if the heart rate starts creeping up at the same intensity, if the RPE for the same workout keeps climbing week on week, one of three things is happening. You've adapted and need a new stimulus. You're accumulating training fatigue and need to absorb. Or, and this is the one most riders miss, life stress is the limiter, not the training. Same numbers, but the answer isn't a new block or a deload. It's stop reading the training data as the cause. Either way, the current block is done.

The 15% rule as an entry gate. Same rule we introduced back in the power-duration curve chapter. Is your threshold power at least 85% of your five-minute power? If you're inside that gap, your aerobic base can support the intensity. If you're outside it, you probably need more base work first.

Don't stack intensity types. If you're doing threshold work, do threshold work. Don't add VO2max intervals on top because you're impatient. Two intensity types in the same week compete for recovery and neither gets the full adaptation.

Strength training fits here, not as a separate chapter. On-bike strength, big gear starts, low cadence force work, slots into the intensity hierarchy. It's not separate from cycling training, it's part of it. The research shows on-bike sprint training produced greater sprint power gains than heavy gym work, 5.6% versus 1.9% for one-second power, with less recovery cost and more specificity. And low-cadence high-intensity work at 50 to 70 RPM produced double the threshold improvement of free-cadence training in one study. For building cycling-specific strength, the bike is the gym. That's not a blanket rejection of lifting. Gym work has its place for bone density, injury resilience, and total-body force, especially as you get older. But for the watts on your bike, the bike does the job.

Masters-specific adjustments.

Now, for most of you, there's another layer on top of all of this.

Close.

The workouts that earn their place are the ones that address your specific limiters, applied at the right time, with clear entry and exit criteria. Every session has a purpose. Every block has a signal. And the moment a workout stops earning its place, the moment it's just volume for the sake of volume, it goes.

That's the training side. Now let's talk about the side that most people skip entirely: execution. How to actually do all of this on the day, in the ride, when it counts.