07/23/2026
What is VO₂ max?
It’s simply how efficiently your heart and lungs use oxygen when you push it.
Think of it as the size of your engine bigger engine, more capacity, more resilience as you age.
How AFIT’s workout structure helps it
At AFIT your heart stays working the whole time, not just during the “cardio” part.
This is why we build workouts with strength and cardio, an a short rest. You’re building muscle and training your engine in the same session.
One of the most effective ways to build it — at home:
🇳🇴 The Norwegian 4x4 Method:
🏃 4 min hard (85–95% HRmax)
🤍 4 min easy (60–70% HRmax)
Repeat x4
Stick with it for 8 weeks and you can see a 7–10% improvement.
Comment “Vo2 max” to get your personalized vo2 guideline.