One-minute repeats sit in a strange middle ground. They are too short to feel like a proper interval and too long to feel like a sprint. Most riders who add them to their training either go out at threshold pace wondering why it feels easy, or pin it from the gun and collapse after three repeats. Neither approach does much. Done correctly, however, a well-structured set of 1-minute repeats is one of the most time-efficient ways to accumulate serious VO2max stimulus — and that matters more to your performance ceiling than almost anything else you do on the bike.
What the workout is actually targeting
The key variable in any VO2max session is not peak power, heart rate, or subjective effort. It is time spent above roughly 90% of your VO2max — the threshold at which the cardiovascular and muscular adaptations that drive long-term aerobic improvements actually kick in. Research has consistently shown that accumulating more time in this zone, rather than simply riding harder or longer, is what drives gains in maximal oxygen uptake. Because it takes your body around 45–60 seconds to fully ramp VO2 uptake toward its ceiling, a 1-minute effort at the right power lands you right at that upper bound for the final 15–30 seconds of each rep. String enough reps together with appropriate rest, and you accumulate a meaningful chunk of time near your aerobic limit without the systemic cost of grinding through 5×5-minute blocks.
This is why 1-minute repeats work particularly well when combined with a broader VO2max training programme — they are a tool for accumulating time in zone, not a standalone fitness strategy. Think of them as a complement to your longer threshold work, not a replacement for it.
How to structure the session
The classic format is 10–20 repeats of 1 minute on, 1 minute off — often written as 1:1 or 60/60. The target power for the effort is usually in the range of 120–130% of FTP, though this varies between riders depending on your VO2max-to-FTP ratio. The recovery is at a genuinely easy pace: roughly 40–55% of FTP. This is the detail most riders get wrong. They spin at 80% during the rest minute, never let the heart rate come down, and then wonder why they fall apart at rep eight. The recovery has to be real.
For a standard session, a solid starting block is 2–3 sets of 6–8 repeats, with 5–8 minutes of easy pedalling between sets. Total work time across the session comes to 12–24 minutes, which sounds modest but represents a serious VO2max stimulus when done at the right intensity. More experienced riders can work up toward 20 continuous repeats without set breaks, though that format demands precise pacing discipline — the first four reps should feel almost too easy. If you are maxed out by rep six, you went too hard.
One common mistake is anchoring the effort to heart rate rather than power. Your HR will lag by 30–45 seconds at these durations, meaning it tells you almost nothing about what you are doing during the rep itself. If you have a power meter, set a specific target and hold it. If you are riding on feel, use perceived exertion around 8–8.5 out of 10 — controlled suffering, not a full sprint. You should be able to speak a short sentence by the end of each recovery, though you will not want to.
When to use them and when to skip them
One-minute repeats belong in the build and peak phases of a training block, not in base. During a long aerobic base period, the physiological return on high-intensity work is lower, and the fatigue cost is disproportionately high relative to where your fitness is. Once you have 8–12 weeks of consistent aerobic riding behind you and your FTP has stabilised, that is when short VO2max repeats start paying real dividends. One quality session per week — two at most if the rest of your load is genuinely easy — is enough to drive adaptation without accumulating the kind of fatigue that erodes your ability to execute other sessions well.
There is also a situational argument for 1-minute repeats beyond fitness building. If you race on courses with short punchy climbs, repeated accelerations out of corners, or bunch sprints that require multiple hard efforts close together, the format of 60/60 specifically trains the repeat-sprint quality you will need. It is not just a VO2max builder — it is also a specificity tool for the demands of aggressive riding. Compare this with something like 30/30 microbursts, which target similar energy systems at slightly different power-to-rest ratios. The 30/30 format tends to allow higher peak power per rep; the 60/60 format builds more sustained tolerance to the upper end of your aerobic range.
Skip this session entirely during recovery weeks, during the final two days before any target event, or when you are carrying residual fatigue from a hard block. Running these sessions on tired legs produces poor quality reps and reinforces bad pacing habits. Quality over quantity applies here more than in almost any other workout type.
How to avoid doing it badly
Let's be direct: the most common failure mode for 1-minute repeats is starting the first few at a power you cannot sustain for the full set. Riders with a strong anaerobic capacity can hit 150% FTP for a minute without feeling destroyed — but then their VO2max output actually dips because the effort has shifted from aerobic to heavily glycolytic. The goal is not to produce the highest possible power for each rep. The goal is to produce the right power, repeatedly, for the entire session. Your last three reps should be nearly identical in power to your first three. If they are not, you went too hard.
Recovery duration is the other common error. One-to-one work-to-rest is a starting point, not a rule. If you are new to high-intensity intervals, or doing a large number of reps, a 1:1.5 or even 1:2 ratio will allow you to maintain quality across more reps with less systemic fatigue. As your fitness improves and your ability to tolerate and recover from these efforts increases, you can tighten the rest. Trying to compress recovery too early forces the session into something closer to threshold work — which is fine, but is not what you came here to do.
Understanding your cycling training zones is essential context here: 1-minute repeats at the correct intensity sit firmly in zone 5 (VO2max), not zone 4 (threshold). That distinction is not academic. Zone 5 work requires a different pacing strategy, different session frequency, and different recovery time. Treating zone 5 intervals like prolonged threshold work is one of the most reliable ways to accumulate fatigue without making fitness gains. For a deeper look at how short VO2max efforts like these compare to other interval structures, the best VO2max intervals for cyclists article covers the tradeoffs across session formats in more detail.
One practical note: you can run 1-minute repeats outdoors on a climb or flat road, but they are significantly easier to execute precisely on a trainer. Holding exact power targets, eliminating traffic variables, and keeping recovery truly easy is much more controllable indoors. That said, there is real value in doing at least some of these sessions outside if your racing is road-based — the coordination demands, pacing under real conditions, and mental engagement are all useful adaptations in their own right.
Sources
- Rønnestad BR, Ellefsen S, et al. "Effects of 12 weeks of block periodization on performance and performance indices in well-trained cyclists." Scandinavian Journal of Medicine & Science in Sports, 2014.
- Billat VL. "Interval Training for Performance: A Scientific and Empirical Practice." Sports Medicine, 2001.
- Sylta Ø, et al. "The Effect of Different High-Intensity Periodization Models on Endurance Adaptations." Medicine & Science in Sports & Exercise, 2016.
- Frontiers in Sports and Active Living. "Faster intervals, faster recoveries — intensified short VO2max running intervals are inferior to traditional long intervals in terms of time spent above 90% VO2max." 2024.