What is biological age, and how is it different from your real age?
Biological age estimates how old your body actually performs, based on physiological markers — rather than the calendar time since you were born (your chronological age). Someone who is 45 chronologically might have a biological age of 40 if their fitness, heart-rate metrics and sleep are strong, or 50 if they're not. Unlike chronological age, biological age can move in either direction with your lifestyle.
How biological age is estimated
Consumer estimates typically combine markers tied to healthy ageing: cardiorespiratory fitness (VO₂max), resting heart rate, heart-rate variability, sleep and daily activity, each compared against age norms. It's a trend estimate, not a clinical diagnosis — the direction it moves matters more than the exact number.
How Vita computes Body Age
Vita's Body Age combines VO₂max, resting heart rate, HRV, sleep and step trends into a single number, and lets you drill into each driver's contribution. Because it updates with your data, you can watch better training and sleep make your body "younger" over time.
FAQ
Is biological age scientifically exact?
Consumer biological-age is a trend estimate from population norms, not a lab test. Its value is tracking direction over time, not the precise number.
Can I lower my biological age?
Often yes — improving fitness (VO₂max), resting heart rate, HRV and sleep tends to lower estimated biological age over months.
How do I see my biological age?
Download Vita free, connect Apple Health or WHOOP, and you'll see your Body Age with each contributing factor within minutes.