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New · Early November

How are your muscles performing?Muscle just got measurable.

Like a sleep score for your muscle health

A 0–100 score designed to help you track muscle performance over time, based on force output, movement quality, and symmetry.

Get your Suji

Already have Suji?
Muscle Score arrives automatically.

Muscle Score is in beta testing.

NEW

Muscle Score

LEGS: 92/100, Excellent. ARMS: 75/100, Good.

Find out your muscle score today and start seeing real progress on your muscle health journey.

Take Muscle Score TestDiscover Muscle Score

A breakthrough in measuring muscle performance, built into the cuffs you already wear. Meet Muscle Score: a personalized metric built on the pressure and movement data Suji captures during a short guided assessment.

Get your Suji

Already have Suji? Muscle Score arrives automatically.

You track your heart. Your sleep. Your steps. What about your muscles?

Understanding how our muscles are performing has traditionally required specialized equipment or very basic measures like weight lifted or reps completed. Muscle Score is designed to change that.

  • Heart rate

  • Sleep

  • Steps

  • Muscles

    Not tracked Until now

How it works

One guided exercise. That’s it.

Choose a body region
A person on a court in a squat stance, wearing a Suji cuff on each upper leg.

No weights or extra equipment.

Cuff placement

Both upper legs

  1. Put on both leg cuffs

    Start the guided Muscle Score check-in in the Suji app.

  2. Do bodyweight squats

    Just one guided exercise per check-in.

  3. Get your score

    Sensors in the cuffs capture pressure and movement. Suji analyzes the signals together and turns them into a personalized score for your lower body.

Pressure + movement

Suji makes muscle performance visible.

The sensors in your cuffs capture pressure and movement while you move. Suji analyzes the signals together.

Illustration: the cuff unwraps into two live signal lines, one for pressure and one for movement, rising and falling with each rep.

More than reps

Same reps. Different performance.

Two people can complete the same number of reps but perform very differently. Suji doesn’t just count your reps. It looks at how you perform them.

Illustrative example. Person A and Person B both complete 12 reps. Person A’s reps stay at the same height and rhythm from the first rep to the last. Person B’s reps get shallower and less even over the second half of the set, so the last rep falls well short of the first.

Person A

First rep vs. last rep

Held steady through the set.

Person B

First rep vs. last rep

Dropped off toward the end.

It’s not just how you start. It’s how well your muscles keep performing.

Illustrative example.

Muscle Score

A personalized score for how your muscles are performing.

A personalized score that helps you understand how your muscles are performing and changing over time.

Illustrative. Muscle Score is a fitness and performance insight, not a medical assessment.

Example

Muscle Score

Example Muscle Score: Lower body 74 / 100; Upper body 68 / 100. Illustrative only.

A starting point, not a grade. Compare with your previous results over time.

You vs. you.

Your muscles are changing. Now you can see it.

Your baseline. A starting point, not a grade.

Example Muscle Score check-insExample data
Example Muscle Score check-ins (Example data)
Check-inScore
161
264
363
468
571
674

Know where you are. Then see where you can go.

Shop Suji

Pick your cuffs. Know your muscles.

Muscle Score uses one guided exercise with a pair of Suji cuffs. Arm cuffs for the upper-body check-in, leg cuffs for the lower-body check-in, or both.

  • Two people wearing Suji cuffs on their arms and legs, seated courtside.

    Both check-ins

    Arm & Leg Cuff Sets

    Muscle Score check-in
    Upper body and lower body

    Push-ups with the arm cuffs, bodyweight squats with the leg cuffs.

    Price:$749.00 Regular price:$907.00 Save $158.00

    Choose this set
  • A person in a gym wearing a Suji cuff on the upper arm.

    Arm Cuff Set

    Muscle Score check-in
    Upper body

    Push-ups (or modified push-ups) with both arm cuffs.

    Price:$599.00

    Choose this set
  • Close-up of a Suji cuff worn on the upper leg.

    Leg Cuff Set

    Muscle Score check-in
    Lower body

    Bodyweight squats with both leg cuffs.

    Price:$599.00

    Choose this set

Muscle Score arrives in the Suji app on November 1.