Two-Mode VO2 Max Training
Pair sustained elevated effort with brief work near maximum intensity.
- Difficulty
- Moderate
- Time to result
- ~months to results
- Steps
- 5
- Confidence
- 99%
Galpin recommends covering two broad cardiovascular demands rather than obsessing over one exact protocol. The first is lower-intensity, longer-duration work that keeps heart rate elevated for roughly 20 to 60 minutes. The mode can be running, swimming, cycling, sled work, circuits, or a group class. The second is shorter work that drives heart rate closer to maximum, such as a scaled interval session. The mechanism is the specific adaptation to imposed demand: challenge cardiovascular capacity, repeat the challenge consistently, and add modest overload over time. The framework deliberately leaves room for preference and ability because adherence to an appropriate stimulus matters more for a general exerciser than selecting a supposedly perfect modality.
Origin
Galpin gives this two-part answer when Bartlett asks how to improve VO2 max. Extracted from The Diary of a CEO.
Core principles
- 01The heart adapts when its current capacity is challenged.
- 02Longer lower-intensity work and shorter higher-intensity work provide complementary demands.
- 03Exercise mode matters less than creating the intended cardiovascular challenge.
- 04Consistency and gradual overload matter more than a perfect protocol.
How to run it
- 1
Choose the modes
Select activities you can perform safely and repeat, such as walking, cycling, swimming, running, circuits, or classes.
Pro tip Preference is useful when it improves consistency.
- 2
Build sustained work
Keep heart rate meaningfully elevated for about 20 to 60 minutes at an intensity you can sustain.
Pro tip Start at 20 minutes if that is the current workable duration.
- 3
Add higher intensity
Use a shorter session that moves heart rate closer to maximum, scaled to ability. Galpin offers 30 seconds hard and 30 seconds rest for four to six rounds as one example, not a universal prescription.
Pro tip A suitable class or circuit can provide this stimulus without precise interval calculations.
Watch out Seek medical guidance before hard intervals if symptoms or health risks make them unsafe.
- 4
Repeat consistently
Keep both demands in the program long enough for adaptation rather than changing protocols continuously.
Pro tip Consistency outranks minor protocol differences for general fitness.
- 5
Overload gradually
Increase duration, effort, or work completed over time without making abrupt jumps.
Pro tip Change one main variable at a time.
In the wild
A beginner cycles for 20 minutes at a sustainable elevated effort on one day. On another day, after appropriate preparation, they perform a short set of scaled hard intervals with recovery between efforts. As fitness improves, duration or workload rises gradually.
→ The week exposes the cardiovascular system to both sustained and higher-intensity demands.
Common mistakes
Searching for a perfect zone
For the general answer Galpin gives, creating and repeating an appropriate challenge matters more than one exact heart-rate number.
Making every session maximal
The method deliberately includes sustainable continuous work as well as shorter high-intensity work.
Is it for you?
Best for
Healthy adults who want a practical starting structure for improving cardiovascular fitness.
Not ideal for
Unscreened maximal efforts by people with cardiovascular symptoms, significant disease, or little training experience.
From the transcript
“something that is a lower intensity longer duration and then something that is a higher intensity shorter duration”
“specific adaptation to imposed demand”
From the episode
The Muscle Growth Doctor: "The Anti-Ageing Cure No One Is Talking About!", "Exercising At Night Is A Terrible Idea!", "Your Grip Strength Predicts Chronic Diseases!" - Andy Galpin