MuscleRx Age Marker

Your Fitness Age

Combine VO₂ max, strength, and body metrics to estimate how your body performs compared with your chronological age.

Enter Your Data

What Drives Fitness Age

VO₂ Max
Strength
Body Metrics
Fitness Age
27
years old
Your Result

You are 34… but your fitness age is 27

Your current conditioning, strength, and body metrics suggest a younger-performing body than your chronological age.

Above Average
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MuscleRx Breakdown

How It Works

VO₂ max is weighted as your cardiovascular age marker.

Strength score reflects your ability to produce force and maintain muscle capacity.

Body metrics reward a healthier composition and lower waist-to-height ratio.

The better those markers look, the younger your performance profile becomes.