Exxentric App Usage

Track, Monitor, and Optimize Training Data with the Exxentric App

This guide will teach you how to use the Exxentric App and kMeter to collect, understand, and use your flywheel training data to improve your performance over time.

SETTINGS

These controls help tailor your training experience to your goals — whether you’re pushing for power, consistency, or endurance.

Stop at

Controls that let you define an “endpoint” metric that will mark the completion of your set. You can select the endpoint of a set based on any of the following variables:

• Pre-defined number of reps
• Pre-defined time.
• Absolute power threshold to stay above.
• Stop at a certain drop-off from max power.
• Stop at a certain drop-off in force.
• Stop at a certain drop-off in velocity.

Advanced

You are likely to keep these settings consistent from session to session, but it’s important to review them and set them to your preference, especially when you’re first starting out.

Pre-reps: These are the reps performed to build up the momentum of the flywheel. These reps are used purely for acceleration and will be discarded in the workout summary. Iso mode means 0 pre-reps, useful if you want to go from a ISO-hold into dynamic action (pinch-release). Default is two pre-reps.

Auto start: Your set Auto Starts when you do. kMeter Module and App senses rotation and starts by itself. Acquisition of data starts and begins without any interaction for the user on the screen. Default: on.

Voice assistance: Use Voice assistance to keep track of your set without looking at the screen. Mute or choose Audio feedback with rep count. Default: off.

Show result after exercise: When activated (default) you will be brought to the result screen after a completed set. With this deactivated you will be brought back to the start screen and the next set and user. The data will always be saved either way but if you don’t see the result screen you won’t be able to add info to the set like VAS and comment.

Single turn mode: this mode only needs to be activated when using the Single-Turn Buckle on the kPulley. Default is deactivated. When activated it recalculates the numbers accordingly to account for the changes in the ROM-rotation relationship.

METRICS

Thanks to improved backend processing and filtering, performance charts perfectly reflect every single rep — without peaks or inconsistencies.

Power and Force

Helpful for tracking improvements in Peak Output and Strength:

Average power = average power for all reps in the set (except pre-reps) both CON and ECC phase.

CONC peak power = average CON peak power during all CON phases in the set (To see CON peak for every individual rep look at the graph).

ECC peak power = average ECC peak power during all ECC phases in the set (To see ECC peak for every individual rep look at the graph).

Peak overload % = ECC peak power / CON peak power. This metric is only relevant when the CON phase is, or close to, maximal. This lets you monitor eccentric overload — proven to enhance hypertrophy and strength gains.

Relative peak power = W / kg or W / lbs body weight

Average force = Approximated force based on calculations from ROM and power. Not to be used between users or exercises but works as an approximation for certain exercises by a certain user.

Motion

Helpful for Rehab, Mobility, and Gen. Fitness Applications:

Range of Motion = how long the average rep was (in centimeters) over the whole set.

Average speed = average rep speed in m/s over the whole set.

Workout

Helpful for comparing Session-to-Session:

Generated energy = energy put into the flywheel in kJ (not your expenditure which will be higher).

Repetitions = number of reps performed.

Workout time = duration of the set.

Inertia = the inertia you set in setup.

VAS = Visual analogue scale. User input after workout summary in the display. Stored in the database with all other data. Can be used to track effort or pain for example.

Score

The app uses a formula to calculate a Score based on output* in combination with the amount of reps.

To get as high a score as possible, the output* and reps should be balanced with similar effort on both. A high output* with low reps will result in a lower score than a medium-medium relationship.

Tracking your Score over time can help you measure output-to-effort balance across sets and structure more productive workouts.

Table showing a simplified example:

* KJ, average Force, concentric-, eccentric-, and average Power.

Understanding the feedback

Your app data is powered by real-time velocity tracking through the kMeter. It’s designed to give consistent, reliable insight into your performance with each rep.

The power data is exact and consistent. Number of reps, rep time and energy expenditure are also exact while vertical motion (ROM) and force are more complicated calculations with more variables and should be considered as an approximation.

We urge you to use data tracking as a way to monitor and optimize an individual athlete’s performance over time, not as a way of comparing multiple users.  It can give information of progress overtime or changes with different inertial loading.

There is a kMeter walkthrough based on older versions of the kMeter Module and Exxentric App, available for free in our online kMeter intro course.