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Part XII · Cycling workouts

VO2max Ride: Raising the Ceiling, Off Your Feet

Four-minute hard intervals on the bike, and why the rep is that long.

Workout at a glance

VO₂max · Aerobic ceiling, peak oxygen uptake

50–64 min

  1. 01

    Warmup

    Breathe in and out through your nose

    You could keep this up for hours

    15 min

    HR 62–76% · RPE 3/10

  2. 02

    Intervals

    In and out through your mouth

    You could hold this for a few minutes

    3 min recovery · easy spin

    4–6 × 4 min

    HR 89–96% · RPE 8/10

  3. 03

    Cooldown

    Breathe in and out through your nose

    You could keep this up for hours

    10 min

    HR 62–76% · RPE 3/10

The lesson

  1. 01

    VO2max is your ceiling

    The most oxygen your body can take in and use in a minute. Lifting it makes threshold cheaper and everything below it more comfortable.

  2. 02

    Ride 4-minute reps

    Four to six of them. Your oxygen uptake climbs slowly on a bike, so a shorter rep gives too little time near the ceiling.

  3. 03

    Spin easy for 3 minutes

    Not a full recovery. If your heart rate falls all the way back, the next rep starts from the bottom again.

  4. 04

    Spin at 95 to 105 rpm

    Faster than anything else you ride. A high cadence puts the load on your heart and lungs rather than your legs.

  5. 05

    Heart rate 89 to 96%

    That is 89 to 96% of your maximum, lower than on a run because every bike band sits lower. RPE 8. Chase your running numbers and rep four falls apart.

  6. 06

    Find four clear minutes

    A long quiet road, a closed loop or a trainer. A junction mid-rep ends the rep.

  7. 07

    It still takes recovering from

    It is easy on the legs but hard on the rest of you.

· revised September 23, 2026vo2max · interval training · top end

The app

You don't have to work out where this fits. The app does that bit.

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