When Uli Schoberer was on the podcast — the engineer who invented the SRM power meter and basically created the cycling power measurement industry — his original design intent surprised me. He didn't build the SRM as a training tool. He built it because as a young rider he wanted to know what his power output actually was during racing. The training applications came later, almost as a by-product.
The detail is in the genius behind the first power meter episode. The full backstory is worth the read. The point for this article is that power data is a tool — useful when wielded well, destructive when wielded badly. The cycling internet has flattened it into either an anxiety machine or a religious object. Neither is what the tool actually does.
This article is how to actually use power data to train better, drawn from Schoberer's original intent, the experts on the podcast who use it daily, and what amateurs typically do wrong.
You bought a power meter. Now what?
The gap between owning a power meter and using it well is wide. Many amateur cyclists buy one, do a 20-minute test, set their zones, and then... train roughly how they trained before, but now with numbers on the screen.
The number on the screen isn't the point. The behaviour the number drives is the point. Power data is useful when it improves the quality of specific decisions: am I in the right intensity for this session, am I pacing this climb well, am I drifting on this easy ride. It's not useful when it's just a digital read-out of effort you'd have made anyway.
The framework for using power well has four levels.
Level 1: Zone definition. Set zones from a current FTP test. Train within zones for specific session goals.
Level 2: Session discipline. Use the zones to execute sessions cleanly — easy rides stay in Zone 2, threshold work hits Zone 4 exactly, VO2max work pushes into Zone 5.
Level 3: Pacing discipline. Use power to pace climbs, time trials, and long efforts. Hold the target watts rather than going on feel.
Level 4: Diagnostic tracking. Use power data across weeks to identify limiters and progress. Track the slower-moving metrics, not the daily numbers.
Most amateurs operate at level 1 with some level 2 execution and rarely make it to levels 3 and 4. The cyclists who use power well at level 4 — usually with structured coaching support — get substantially more value from the tool.
Setting zones correctly
The FTP test itself has multiple valid formats. The 20-minute test, the ramp test, and critical-power testing each produce slightly different numbers and have different strengths.
20-minute test. Warm up, then 20 minutes flat-out. Take 95% of the average power as FTP. The classic format, well-validated, requires real motivation to execute properly. The 5% multiplier accounts for the typical relationship between 20-minute power and 1-hour sustainable power.
Ramp test. Progressive ramp until failure. Take 75% of the 1-minute peak power as FTP. Quicker, easier to repeat, tends to slightly overestimate FTP for cyclists with strong anaerobic capacity and underestimate for cyclists with strong aerobic capacity.
Critical power testing. Multiple all-out efforts at different durations (typically 3 minutes and 12 minutes), used to derive critical power and W' values. More analytically rich, requires more recovery, used by sports scientists more than amateur cyclists.
For most amateur cyclists, the 20-minute test or the ramp test work fine. Pick one, run it consistently, and the test-to-test comparisons matter more than which format you use.
Once FTP is set, the zones derive from standard Coggan ranges: Zone 1 (under 55% FTP), Zone 2 (56–75%), Zone 3 (76–90%), Zone 4 (91–105%), Zone 5 (106–120%), Zone 6 (121–150%), Zone 7 (over 150%). The FTP zone calculator does the math. Plug in your number and the boundaries are set.
The accuracy of these boundaries matters. A rider with badly set zones — FTP set too high, or set from an old test — will under-execute hard sessions and over-execute easy sessions. The session-by-session damage is small; the cumulative effect across a block is substantial.
The three metrics Pogacar's team uses beyond FTP
The detail is in 3 training metrics Pogacar uses. The headline: World Tour teams track multiple power-related metrics, not just FTP. Three of the most useful for amateurs:
5-minute power (VO2max approximation). The peak power you can hold for 5 minutes is a strong proxy for VO2max and predicts performance on short climbs and attacks better than FTP. Test once per training block. Track the trend. The cyclist with stable FTP but rising 5-minute power is making progress on VO2max even when FTP looks flat.
Durability — power retention at end of long rides. The ability to produce the same power at hour 4 of a ride as at hour 1. Quantifiable by comparing power outputs in matched intervals at the start and end of long rides. Most amateurs see 10–15% drop-off from start to end of a 4-hour ride; trained cyclists drop 3–5%. Improving durability moves race performance more than raising peak power, because most races are won and lost in the late stages.
Short-effort repeat power. Power held across repeated 30-second to 1-minute efforts with short recovery. Predicts race performance in attacking and counter-attacking situations. Test with a session like 8×30 seconds with 30 seconds recovery, recording all 8 efforts. Track the average and the decline from rep 1 to rep 8.
These three metrics plus FTP give a more complete picture than FTP alone. The cyclist who tracks all four sees the actual training adaptations across blocks rather than guessing from a single FTP number.
Power vs heart rate — when each one tells the truth
This is where most amateurs get the integration wrong. Power and heart rate are different tools with different strengths.
Power is what you're putting in. Direct, instant, deterministic. The number on the screen is what the legs are producing. Useful for execution and pacing.
Heart rate is what your body is doing about it. Lagged, contextual, integrative. The number reflects fitness, fatigue, hydration, temperature, sleep, life stress, and a dozen other variables. Useful for state and recovery assessment.
Where they agree, training is going well. Where they disagree, the disagreement is the signal. The cyclist riding 200W at heart rate 165 today, when last week the same 200W was at 145, is fatigued or under-recovered. The cyclist riding 250W today at the same heart rate as last week's 220W is making fitness gains.
Power on hard sessions. Intervals need precise intensity. Heart rate lags 1–2 minutes behind effort changes and isn't useful for a 4-minute VO2max interval. Hit the prescribed power, watch the heart rate as a state check.
Heart rate on easy days. Power can mislead on easy rides. A strong cyclist produces 200W at conversational pace; without the heart rate context, that 200W might be Zone 2 today and Zone 3 next month as fitness drifts. The heart rate boundary is the more reliable easy-day cap.
Both on long rides. Power confirms you're holding the target pace; heart rate confirms aerobic decoupling isn't excessive (heart rate climbing while power stays steady indicates fatigue accumulation). Together they tell the full story.
The work covered in Prof Seiler on cycling fast at a low heart rate gets into the deeper mechanisms — why the same power at lower heart rate is the actual fitness signal.
Matt Bottrill on TT pacing
When Matt Bottrill was on the podcast — the TT specialist coach who took Victor Campenaerts to the Hour Record — the framework for TT power pacing was the cleanest I've heard. The detail is in Matt Bottrill's pro TT techniques episode.
Hold the prescribed watts. Trust the math. The single most important TT discipline. The pacing target is calculated from FTP, course profile, and target time. Hold it. The first 5 minutes of a TT always feel too easy for the prescribed power — that's normal, the body hasn't fully recruited yet. Going harder than prescribed in those first 5 minutes is the most common amateur TT mistake.
Power discipline on climbs. Most amateurs surge on climbs and recover on descents. Bottrill's framework is the opposite — hold steady power through the climb, even if it means dropping back, then accelerate where the gradient allows efficient power deployment.
Course-specific pacing strategies. Different courses need different distributions. A lumpy course wants slightly higher than threshold on climbs, slightly lower in the valleys. A flat course wants steady threshold throughout. The pacing strategy is built course by course.
Final 5 minutes. The window where you spend what's left. Most riders save too much and finish with capacity unused. The right TT pacing has the cyclist on the edge of breakdown for the final 5 minutes, holding form and power despite the legs screaming.
The framework applies to longer hard efforts as well — sportive climbs, climb-and-descend race sections, threshold blocks within a long ride. Power discipline is what separates the cyclist who finishes strong from the one who blows up.
Smart trainers as power meters
For the amateur cyclist who can't afford a road power meter, smart trainers serve as the practical alternative for indoor training. The accuracy is usually within 2–3% of road power meters, which is fine for most training applications.
The limitation is outdoor pacing — without a road power meter, outdoor sessions rely on heart rate and perceived effort. For some cyclists this is enough; for those targeting events with specific power pacing demands (TTs, hilly sportives, criterium racing), the road power meter pays back.
Pricing has dropped substantially in recent years. Pedal-based power meters (Garmin Vector, Favero Assioma) sit in the $400–$1000 range. Crank-based options (4iiii, Stages) start lower. Direct-drive smart trainers (Wahoo Kickr, Tacx Neo) cover indoor.
The kit pays back its cost in better-targeted sessions across the year. For amateurs serious about training, the power meter is one of the highest-leverage equipment investments. For amateurs riding casually or training by heart rate already, the upgrade is less critical.
Common power data mistakes
Zone obsession. The cyclist who modifies pace mid-session to stay exactly in a zone, rather than executing the session as prescribed. Zones are guidelines. Sessions are the work.
Testing too often. FTP test every 4 weeks adds testing fatigue without producing meaningful signal. Every 8–12 weeks.
Ignoring RPE. Power numbers can be wrong (calibration drift, environmental factors, mechanical issues). The cyclist who blindly trusts the power meter when RPE strongly disagrees ignores useful information.
Chasing the number. The FTP number on the screen is downstream of fitness. Train the underlying systems and FTP follows. Train for the FTP test and you get good at the FTP test and nothing else.
Daily reactions to power numbers. A power session that comes in 3% below target isn't a signal to retest FTP or change the plan. Day-to-day variability is huge. Multi-week trends are what matter.
What to look at weekly, monthly, and seasonally
Weekly. Total training hours, key session execution (did you hit the target intensities?), morning resting heart rate trend. Quick review at the end of each week.
Monthly. Rolling 7-day HRV average direction, body composition direction, sleep quality trend, peak power numbers (5-minute, 1-minute, 5-second) across the month. Identify which trends are moving and which are stuck.
Every 8–12 weeks. FTP test on consistent protocol. Compare to previous test. The actual progress measurement.
Seasonally. Review the full training block against the periodisation plan. Identify what worked and what didn't. Adjust the next block's structure accordingly.
The cyclist who reviews daily power numbers misses the signal in the noise. The cyclist who reviews at the right time horizons sees the actual training response and can adjust accordingly.
What to do next
Start with the Plateau Diagnostic — four minutes, free, returns the one change most likely to move your numbers. For riders with power meters that have been on the bike for a year but no FTP movement, the limiter is usually mis-set zones or wrong stimulus selection, not lack of power data. If your zones haven't been updated from a recent FTP test, run an FTP test and reset them via the FTP zone calculator. If you're a masters cyclist, the masters FTP benchmark puts your number in age-grouped context. For watts per kilo, the W/kg calculator handles the math.
For deeper coaching support around power-based training, the coaching pathways cover specific options. The Not Done Yet community at $195/month is the lower-investment route with weekly calls where power-based questions come up regularly. For full one-on-one programming with weekly power data review, the Roadman Method at $297-397/month is the structured 12-month route.
The power meter is a tool. Like any tool, it's useful in proportion to the skill of the user. The cyclist who learns to use power data well — set zones correctly, execute sessions cleanly, track the right slower-moving metrics — gets substantial benefit. The cyclist who treats the number as the goal often gets less benefit than if they'd trained by heart rate without the data. The discipline is in how you use it.