VO2 Max vs. Lactate Threshold: What Gravel Riders Need to Know
When cyclists talk about getting faster, two terms are often thrown around: VO₂ max and lactate threshold.
Many riders focus on increasing VO₂ max because it sounds impressive. After all, it's often called the ultimate measure of aerobic fitness. But for gravel racers, the real question isn't how much oxygen you can consume—it's how much of that fitness you can actually use for hours on race day.
Understanding the relationship between VO₂ max and lactate threshold can help you train smarter and race faster.
What Is VO₂ Max?
VO₂ max is the maximum amount of oxygen your body can utilize during exercise.
Think of it as the size of your aerobic engine.
A larger engine gives you the potential to produce more power. Elite cyclists typically have very high VO₂ max values because their cardiovascular systems can deliver and use large amounts of oxygen.
However, having a large engine doesn't automatically mean you're using it efficiently.
What Is Lactate Threshold?
Lactate threshold is the highest intensity you can sustain before fatigue begins accumulating faster than your body can clear it.
For gravel racers, this is often the most important performance metric.
Your lactate threshold determines:
How hard you can climb without blowing up
How well you can handle headwinds
How quickly you recover from surges
How much power you can sustain late in a race
A rider with a moderate VO₂ max and a high lactate threshold will often outperform a rider with a huge VO₂ max and a low threshold in gravel events.
The Relationship Between VO₂ Max and Lactate Threshold
Imagine two riders.
Both have a VO₂ max that allows them to produce 300 watts at maximum aerobic effort.
Rider A has a lactate threshold at 225 watts.
Rider B has a lactate threshold at 270 watts.
Even though both riders have the same aerobic engine, Rider B can utilize a much greater percentage of that engine for long periods of time.
That's a huge advantage in gravel racing.
The goal isn't simply to increase VO₂ max. The goal is to increase the percentage of VO₂ max you can sustain.
Why Gravel Racers Need Both
VO₂ max sets the ceiling.
Lactate threshold raises the floor.
The larger the gap between your threshold and your ceiling, the more fitness you're leaving unused.
The most successful gravel racers typically develop:
A strong aerobic base
A high VO₂ max
An exceptionally high lactate threshold
Excellent fatigue resistance
Together, these qualities allow them to ride hard for hours while still responding to attacks, climbs, and technical terrain.
How to Train VO₂ Max
VO₂ max workouts are short, hard efforts designed to push your aerobic system near its maximum capacity.
Examples:
5 x 4 minutes at 110–120% FTP
4 minutes recovery
or
6 x 3 minutes hard
3 minutes recovery
These workouts increase cardiac output, oxygen delivery, and aerobic capacity.
They are effective but also highly fatiguing.
How to Train Lactate Threshold
Threshold training teaches your body to sustain a higher percentage of your aerobic capacity.
Examples:
3 x 12 minutes at 95–100% FTP
2 x 20 minutes at 95–100% FTP
Over-under intervals:
2 minutes at 105% FTP
2 minutes at 90% FTP
Repeated for 20–30 minutes.
These workouts improve lactate clearance, muscular endurance, and sustainable power.
Which Is More Important for Gravel Racing?
For most gravel riders, lactate threshold training delivers the greatest return on investment.
Why?
Because most gravel races are not ridden at VO₂ max.
They're ridden near threshold for extended periods with occasional surges above threshold.
If you can raise the power you sustain for hours, you'll become significantly faster without necessarily increasing your maximum power.
A Simple Gravel Training Progression
Phase 1: Aerobic Base
Zone 2 endurance rides
Strength training
Long gravel rides
Phase 2: Threshold Development
Sweet Spot intervals
Threshold intervals
Over-unders
Phase 3: VO₂ Max Development
Short high-intensity intervals
Race-specific efforts
Group rides and simulations
Phase 4: Peak
Reduced volume
Race-specific intensity
Recovery
The Bottom Line
VO₂ max determines the size of your engine.
Lactate threshold determines how much of that engine you can use.
For gravel racers chasing stronger climbs, faster finishes, and better race results, the biggest gains often come from improving lactate threshold while strategically using VO₂ max training to raise the ceiling.
Train your engine.
Raise your threshold.
Build fatigue resistance.
That's the formula for becoming a stronger gravel racer.