Younger
A younger Fitness Age generally means your current performance is above the typical reference for your actual age.
PrimeCheck explainer
What does fitness age mean?
Fitness age is a comparative estimate: a simple way to describe how your current performance stacks up against what is typical for people your age and sex.
Measure your fitness ageA performance comparison
Not biological age. Not a diagnosis.
Many fitness-age models are conventionally tied to cardiorespiratory fitness, often using a measure related to VO₂ max. That makes sense: aerobic capacity is strongly connected to the effort you can sustain. But it is not the only capability that matters in daily life.
PrimeCheck uses a broader at-home battery. It combines accessible signals from strength, cardio, core endurance, mobility, and balance to create a practical comparison—not a laboratory test and not a claim about your biological age.
Think of the result as a prompt to ask a better question: which part of my current capacity is strongest, and which one is ready for attention? See the at-home tests behind the estimate.
What PrimeCheck uses
A wider view of everyday fitness.
No single movement can tell your whole story. These performance signals make the estimate more useful than a cardio-only snapshot.
- 01
Cardio
How your heart and lungs respond to a simple, low-equipment effort.
- 02
Strength
Your capacity to stand, push, and repeatedly work against your own body weight.
- 03
Core endurance
How steadily you can hold a supported position over time.
- 04
Balance
How well you can control your position on one leg.
- 05
Mobility
How comfortably you move through useful ranges of motion.
What is a good fitness age?
Use the number for context, not judgment.
Matched
A matched Fitness Age means your performance is roughly typical for your age—a useful baseline, not a pass-or-fail grade.
Older
An older Fitness Age signals that one or more performance areas are below the typical reference. It points toward a trainable opportunity, not a fixed identity.
The most useful result is one you can act on. Your baseline can change as your habits, training, recovery, and confidence change. See practical ways to lower your fitness age.
Make it personal
Your result starts with a real baseline.
Take the guided at-home assessment to see your Fitness Age, Prime Score, and the performance category with the biggest opportunity to improve.
Important
PrimeCheck provides an informational fitness estimate, not a medical diagnosis or measure of biological age. If you have a health condition, current injury, concerning symptoms, or are considering demanding exercise, consult a qualified health professional first. Stop any movement that causes pain, dizziness, or unusual discomfort.