VO₂ max, or maximum oxygen consumption, is one of the best indicators of health, aerobic capacity, and longevity. The higher your VO₂ max, the greater your endurance, recovery, energy, and cardiovascular protection.
But while many focus exclusively on this aspect, focusing only on improving VO₂ max and neglecting strength training is a big mistake.Muscle strength is also essential for health, functionality, and successful aging.
In this article you will discover how to improve your VO₂ max intelligently without sacrificing strength training, combining three pillars: basic aerobic capacity, high-intensity training and well-structured strength training.
Why VO₂ max is so important
A low VO₂ max is associated with:
- Less energy.
- Increased risk of cardiovascular and metabolic diseases.
- Shorter life expectancy.
- Higher mortality from any cause.
- Slower recovery.
How to Improve Your VO₂ Max: The Most Effective Protocol
One of the most effective ways to develop VO₂ max is through long high-intensity intervals, also known as training in zone 5.
4×4 Protocol (Zone 5)
- 4 minutes at 90–95% of your maximum heart rate.
- 4 minutes of active recovery (very low intensity).
- Repeat 4 to 6 times.
- Do it once a week, or twice at most, never on consecutive days.
This protocol is very demanding. The body needs to fully recover to adapt and improve.
Zone 2: the base that holds everything together
Zone 2 training (sustained low-intensity cardio) improves mitochondrial efficiency, metabolic health, and your ability to recover. It also serves as a foundation for more intense training.
How to identify zone 2:
- You can hold a conversation, but with some effort.
- 60–70% of your maximum heart rate.
- Ideal: 45–60 minutes per session.
- Activities: cycling, brisk walking, light jogging, etc.
Doing 3 to 4 sessions per week is recommended.
How to include strength training
There's no need to cut back on your gym sessions. On the contrary, maintaining—and ideally improving—your strength is essential for:
- Preserve muscle mass over the years.
- Improve insulin sensitivity and glycemic control.
- Strengthen joints and neuromuscular system.
- Prevent injuries, falls and fractures.
- Increase bone stability and density.
- Maintain healthy hormone production.
- Maintaining physical independence as you age.
Practical suggestions:
- Strength train 3 to 4 times a week.
- Prioritize compound exercises: squats, deadlifts, bench press, pull-ups.
- Use a progressive overload approach.
- Add mobility, core and stability work.
- Maintain good technique and control.
Combined week example
Here's a realistic and sustainable way to put it all together:
- Monday: Strength (lower body + core). After your workout or later in the afternoon: Zone 2 (30–45 min).
- Tuesday: Zone 2 (45–60 min).
- Wednesday: Strength (upper body).
- Thursday: VO₂ max training (4×4 in zone 5).
- Friday: Strength (full body or corrective exercises).
- Saturday: Zone 2 (45–60 min).
- Sunday: Complete rest or gentle mobility.
If you're short on time or prefer to combine workouts, you can add more combined strength and Zone 2 days, separated by a few hours or even in the same session (weights first, Zone 2 last).
Common mistakes to avoid
- Doing intense cardio (Zone 4 or 5) too many days → leads to chronic fatigue, not progress.
- Skipping zone 2 → your aerobic capacity will not be sustained over time.
- Training cardio before strength → affects your weightlifting performance.
- Ignoring strength by focusing only on endurance → accelerates muscle loss.
Conclusion
The combination of Zone 2, Zone 5 intervals, and strength training is one of the most comprehensive ways to improve your health, performance and longevity.
Zone 2 for the base – Zone 5 for the peak – Strength for life.
This approach strengthens your heart, optimizes your aerobic capacity, maintains your muscles, and creates a solid foundation for physical and mental performance at all stages of life.