Muscle Readiness Index

Muscle readiness is a objective indication of the state of your muscles. A higher Muscle Readiness Index indicates that your muscles are properly prepared to engage in athletic activity, or adequately cooled down after your exercise. A low Muscle Readiness Index indicates that you are not ready to perform at your peak, and you may be more susceptible to injury or soreness.

The Pact system uses the data collected from the Pact Sense, as well as your demographic information to calculate your Muscle Readiness Index. Unlike a trainer or physical therapist, our Pact provides objective data that can be used to track your progress over time.

Our Technology

The measurements taken by the Pact Sense are based on an engineering discipline known as “System Identification”.

Just like you can feel knots in your muscles, Pact Sense “feels” your muscles by applying a special force pattern, and measuring how they react. Mechanical properties of your muscles are then calculated from the data, which serve as the basis for your Muscle Readiness Index.

Muscle Stiffness

Stiffness is one muscle property that you are probably familiar with. When evaluating stiffness, you can think of your muscles as a spring. The stiffer the spring, the more it will push back as it is compressed.

After a vigorous exercise, your muscles will feel “tight”. This is because your muscles’ stiffness increases as they become more fatigued.

Stiffness is one of the primary metrics that the Pact system uses to evaluate your Muscle Readiness Index.

Muscle Damping

If you shake your arms or legs in the right way, your muscles bounce back and forth. Damping is a measurement of how quickly your muscles stop moving after the shaking stops.

A small amount of damping means that your muscles will continue to jiggle once you stop shaking, while a lot of damping will result in your muscles quickly coming to a stop.

Similar to stiffness, the amount of damping in your muscles will change as you warm up, perform, and cooldown from your exercise.