Fitness
VO₂ Max: The True Measure of Your Fitness
VO₂ Max: The true number that tells how fit you really are
"I'm young, my reports are normal... so why do I get breathless climbing stairs or walking a bit?"
Often, the answer lies in your VO₂ max.
1. What exactly is VO₂ Max? VO₂ max is the amount of oxygen your body can use in one minute during exercise. The higher it is, the better your endurance and stamina.
Here are two simple, relatable examples:
2. A car with a big engine runs smoothly uphill → high VO₂ max 3. A car with a small engine tires quickly over short distances → low VO₂ max
4. How to measure it? The gold standard is a lab test, but nowadays smart watches like Apple, Garmin, Fitbit estimate VO₂ max while you walk or run.
5. What is normal or low VO₂ max? Generally: • Men: 35–45 is normal • Women: 27–38 is normal Values below these indicate lower functional fitness.
6. Why do you get breathless even without illness? Even without heart or lung disease, a sedentary lifestyle lowers VO₂ max, causing early breathlessness. This is very common today.
7. Why is VO₂ Max so important? If VO₂ max is low: → Trekking, stairs, exercise become difficult → You get tired quickly in daily activities → Risk of cardiac and respiratory problems increases over time
8. Special note for elderly and cardio-diabetic people Along with VO₂ max, check resting heart rate, walking pace, and recovery time on your smart watch. Don't ignore early breathlessness, continuously low VO₂ max, or delayed recovery; consult your doctor.
9. Can it be improved? How long does it take? Brisk walking, cycling, interval training 4–5 days a week can show changes in 6–8 weeks and objective improvement in 3–6 months.
Let's accept one reality:
10. Having a normal BMI doesn't mean your fitness is excellent. What truly matters is how well your body functions, and VO₂ max is the window into that.
Fitness is not about appearance but functionality, and VO₂ max reveals that.
If your smart watch shows your VO₂ max, share it in the comments and let's discuss.
Dr Ravindra L. Kulkarni, MD, DNB, FSCAI (Cardiology) Just For Hearts