In REN, we define the VO₂max pace as the pace you can sustain for about 6 minutes all-out. This represents the upper end of your aerobic capacity — the fastest speed your body can maintain while still relying primarily on oxygen for energy.
How REN Determines Your VO₂max Pace
Before Testing
If you haven’t done a VO₂max pace test yet, REN will estimate your VO₂max pace as a percentage of your Critical Speed (CS). This gives you a good starting point to guide your training.After Testing
To make your training more precise, you can perform a dedicated VO₂max pace test:Warm up thoroughly (easy jogging, strides, mobility).
Run 6 minutes at maximum effort.
Your average pace during these 6 minutes is your VO₂max pace.
Once you’ve completed this test, REN replaces the estimate with your personalized VO₂max pace.
Why Not Just Use a Percentage of CS?
For some runners, VO₂max pace is much faster than Critical Speed.
For others, it’s only slightly above.
Because of this variation, percentages alone aren’t accurate for everyone.
That’s why REN starts with a safe estimate, but encourages testing for a truly personal value.
Where VO₂max Pace Fits in Your Training
Above Threshold: Defines the high-intensity domain, faster than your CS.
Interval Training: Used in shorter, harder efforts (e.g., 2–5 minute repeats).
Race Prediction: Helps REN model your performance in short races like 3K or 5K.
Why REN Uses VO₂max Pace
Personalized: Moves from an estimated % of CS ➝ your own tested pace.
Practical: Simple test, no lab required.
Effective: Ensures your high-intensity training is tough enough to bring progress, but not overprescribed.
✅ In short: VO₂max pace is the speed you can hold for 6 minutes all-out. REN first estimates it from your Critical Speed, but once you do the test, it becomes fully personalized to your ability.