Cardio fitness
Use a known VO2max, a Cooper test, a recent race time, or resting heart rate if that is all you have.
Healthspan Estimator
Plan for what you want to keep doing.
See how your estimated cardio capacity may change with age, with uncertainty shown and one practical next step.
No account requiredData stays on this deviceRefine details later
Example
What you'll get
Alex is 45, chooses age 90 as the planning horizon, and wants to keep hiking, climbing stairs, and playing actively with family. After a few basic inputs, Vitality Arc shows a range for how cardio capacity may change, compares it with an everyday-activity cardio reference, and gives one practical next step. It does not diagnose health or predict lifespan.
Before You Start
This is a wellness estimator, not medical advice
Use this tool for education, planning, and habit coaching. The results are approximate and should not be used to diagnose disease, estimate exact lifespan, or make medical decisions.
- Results are shown as a plausible range because consumer inputs can be noisy or incomplete.
- The estimator is designed for general wellness, not diagnosis, treatment, or emergency guidance.
- If you have symptoms or questions about medical risk, talk to a qualified clinician.
Want to see the research and formulas behind the app? Visit the About & Methodology page.
How this healthspan calculator works
Vitality Arc is a free healthspan estimator. You enter a few simple signals like cardio fitness, steps, strength, and body-composition context, then the app builds illustrative lower, base, and upper scenarios.
Instead of pretending to tell you one exact future, the app shows illustrative scenarios and compares future cardio capacity with approximate activity-demand lines. It does not determine whether an activity will be safe or possible.
The goal is not to diagnose disease. The goal is to make long-term fitness and healthspan planning easier to understand.
Why it shows a range
VO2max estimates, race times, resting heart rate, steps, and body-fat numbers can all be useful, but they are never perfectly clean.
Showing a range is our way of being honest about uncertainty. The bands vary with the cardio measurement method and training assumptions. They are sensitivity scenarios, not validated confidence intervals; more completed fields do not establish accuracy.
That makes the output more useful than a one-number wellness score that looks precise but hides the uncertainty.
Simple inputs you can actually use
You do not need lab testing to get started. This healthspan estimator is built around signals many people already have from a wearable, a race result, a simple field test, or a gym benchmark.
Movement and habits
Daily steps, weekly cardio, strength minutes, and strength-training days help describe your usual movement pattern.
Strength and body composition
Deadlift, grip strength, push-ups, pull-ups, dead hang, height, waist, and body-fat estimates add more context to the long-term outlook.
Frequently asked questions
Plain-English answers about how the estimator works and what it does not claim.
What is a healthspan estimator?
It is a planning tool that explores possible future cardio capacity from fitness inputs. Vitality Arc does not have a validated model for years of healthspan or loss of independence.
Why does Vitality Arc show a range instead of one exact number?
Because inputs like wearables, field tests, and body-fat estimates are noisy. A lower, base, and upper range is more honest than false precision.
Do I need a wearable to use this healthspan calculator?
No. A wearable helps with steps and resting heart rate, but you can still use simple manual inputs like age, VO2max, race time, strength benchmarks, height, and weight.
Is this a medical diagnosis or lifespan prediction?
No. Vitality Arc is a non-medical wellness estimator for education, coaching, and planning. It does not diagnose disease or predict your exact lifespan.
What is VO2max and why does it matter for longevity?
VO2max measures your maximum oxygen uptake during exercise. Research shows it is one of the strongest predictors of all-cause mortality and long-term physical independence. Vitality Arc uses it as the primary cardio fitness signal.
How does grip strength relate to healthspan?
Grip strength is a well-studied biomarker correlated with overall strength, functional independence, and mortality risk. Vitality Arc uses it as a direct strength input with an illustrative future curve alongside deadlift, push-ups, and pull-ups.
What is the difference between healthspan and lifespan?
Lifespan is how long you live. Healthspan is how long you stay physically capable and independent. Vitality Arc focuses on healthspan by tracking cardio fitness, strength reserve, and body composition against age-adjusted benchmarks.
Can I use push-ups and pull-ups instead of a deadlift or grip test?
Yes. Push-ups and pull-ups are optional performance inputs. The combined reserve score is a low-confidence product heuristic, not a validated health measure. A chair-stand result can add separate lower-body context.