In the world of endurance and performance, VO₂ max is often treated like a badge of honor. It’s the measure of your body’s ability to use oxygen during intense exercise—essentially, how strong your internal engine is. But it’s important to remember that VO₂ max is not a fixed number. Like strength or flexibility, it’s something you can improve and maintain with consistent effort. And more importantly, don’t stress if your number isn’t as high as you hoped. The good news? You have plenty of tools to keep your VO₂ max strong for years to come.
Here are three smart and sustainable ways to maintain—or even boost—your VO₂ max as you age:
1. Diversify Your Training
One of the easiest ways to hit a plateau is by doing the same workout over and over. Your body adapts quickly, and without new challenges, progress slows. That’s why it’s crucial to mix things up:
- Interval training: Push your heart rate up with short bursts of speed.
- Hill repeats: These naturally build strength and aerobic capacity.
- Strength training: Lifting weights supports muscle health, which in turn supports cardiovascular function.
A varied routine keeps both your muscles and your cardiovascular system on their toes—and your VO₂ max rising.
2. Don’t Skip Zone 2 Runs
While high-intensity workouts get a lot of the attention, zone 2 runs—the easier, conversational-paced efforts—are the quiet heroes. These low-intensity sessions help your body:
- Build more mitochondria (the energy powerhouses in your cells)
- Improve capillary density (helping oxygen delivery)
- Increase fat metabolism
Together, these adaptations enhance your endurance and keep your “engine” efficient and strong.
3. Follow the 80/20 Rule
According to many top endurance coaches and researchers, the sweet spot for training is spending:
- 80% of your time in low-intensity (zone 2) workouts
- 20% in higher-intensity efforts
This balance allows for consistent aerobic development without burning out or risking injury from constant hard training. It’s a principle used by elite athletes and recreational runners alike.
Keep Moving—Always
Dr. Todd Buckingham, exercise physiologist and visiting professor at Grand Valley State University, puts it simply:
“We don’t stop exercising because we get old. We get old because we stop exercising.”
The key takeaway? VO₂ max doesn’t have to decline dramatically with age—as long as you stay active. It’s never too late to train wisely, move regularly, and enjoy the health and performance benefits that come with maintaining a strong cardiovascular base.
Final Thoughts
Your VO₂ max is a dynamic reflection of your overall fitness. With intentional variety, steady low-intensity training, and consistent effort, you can keep your VO₂ max levels high—and your vitality even higher—for decades to come. Keep showing up, keep moving, and let your training carry you into every new season of life with strength.