Kinvent K-FORCE Plates User manual

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User's manual
WE MEASURE PROGRESS
KFORCE by

K-FORCE manual
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This manual concerns K-FORCE products. The information content of this manual belongs to KINVENT, and is
provided only for the purpose of operating K-FORCE devices and software.
This manual is subject to modifications. The latest version is available on www.k-invent.com .
Manufacturer : KINVENT
91400, Orsay, France
[email protected]
www.k-invent.com
Last revision: 30-12-2016
Complies with MDD93/42/EEC Directive Requirements

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Contents
________________________________________________________________________________ 1
________________________________________________________________________________ 1
Contents _________________________________________________________________________ 3
Introduction ______________________________________________________________________ 5
About us ______________________________________________________________________________ 5
Important safety notice __________________________________________________________________ 5
Photosensitive seizure warning ____________________________________________________________________ 5
Safety _________________________________________________________________________________________ 6
General Operating Conditions _____________________________________________________________ 6
Operating Environment___________________________________________________________________________ 6
Storage, Packaging and Transportation ______________________________________________________________ 6
Calibration ____________________________________________________________________________ 6
K-FORCE app______________________________________________________________________ 7
Home screen___________________________________________________________________________ 7
Participant Selection and Creation _________________________________________________________ 8
Participant ’s history ____________________________________________________________________ 8
Basic Exercise Screen ____________________________________________________________________ 9
K-FORCE Grip ____________________________________________________________________ 11
Benefits______________________________________________________________________________________ 11
Technical Features______________________________________________________________________________ 11
Get Started ___________________________________________________________________________ 12
K-FORCE Muscle Controller ___________________________________________________ 13
Benefits ______________________________________________________________________________________ 13
Technical Features______________________________________________________________________________ 13
Get Started ___________________________________________________________________________ 14
K-FORCE Plates___________________________________________________________________ 15
Benefits ______________________________________________________________________________________ 15
Technical Features______________________________________________________________________________ 15
Installation ___________________________________________________________________________ 16
On the floor ___________________________________________________________________________________ 16
On vertical surface _____________________________________________________________________________ 16
Get started ___________________________________________________________________________ 17
Balance exercises ______________________________________________________________________ 17
Postural assessment____________________________________________________________________ 18
Static balance exercise __________________________________________________________________ 19

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Dynamic Balance Exercise _______________________________________________________________ 20
K-FORCE Bubble __________________________________________________________________ 21
Benefits______________________________________________________________________________________ 21
Technical Features______________________________________________________________________________ 21
Get Started ___________________________________________________________________________ 22
K-FORCE Sens ____________________________________________________________________ 23
Benefits______________________________________________________________________________ 23
Technical Features______________________________________________________________________________ 23
Get Started ___________________________________________________________________________ 24
Troubleshooting__________________________________________________________________ 25
Problems with the device ________________________________________________________________________ 25
Connectivity problems __________________________________________________________________________ 25
Legal information ________________________________________________________________ 26
Warranty Terms _______________________________________________________________________ 26
Warranty terms ________________________________________________________________________________ 26
European Union________________________________________________________________________________ 26
Other countries ________________________________________________________________________________ 26
Service policy __________________________________________________________________________________ 26
Warning _____________________________________________________________________________ 26
FCC information _______________________________________________________________________ 27
Contact Information____________________________________________________________________ 27

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Introduction
Thank you for purchasing a K-FORCE product.
K-FORCE is the product line developed by KINVENT to quantify objectively the rehabilitation. The product line
of K-FORCE is the complete tool designed for assessing, monitoring and exercising balance, strength, and joint
motion. It consists of 5 devices, all of them equipped with high precision measuring systems and with the
KINVENT's excellence in interface development, mechanics and electronics. K-FORCE is composed of:
•for the evaluation of hand grip strength
•KINVENT's hand held muscle dynamometer
•for the assessment of lower limb strength as well as balance
•for the assessment of joint amplitudes
•for the rehabilitation with biofeedback by the way of inflatable tools
Minimum Requirements: Android 5.0+ and iOS 10.0+,Bluetooth Low Energy, 5'' Screen
About us
KINVENT is specialized in the design and manufacturing of biomechanics equipment. Our strength is that
we can conceive and implement solutions to any challenge in sports biomechanics and physical rehabilitation.
Our products include ready-to-use force plates, inertial wireless sensors, simulators and various custom-made
applications.
Find more information on our products at www.k-invent.com.
Important safety notice
Photosensitive seizure warning
A very small percentage of people may experience a seizure when exposed to certain visual images, including
flashing lights or patterns that may appear in video games. Even people who have no history of seizures or
epilepsy may have an undiagnosed condition that can cause these “photosensitive epileptic seizures” while
watching video games. These seizures may have a variety of symptoms, including altered vision, eye or face
twitching, jerking or shaking of arms or legs, disorientation, confusion, or momentary loss of awareness.
Seizures may also cause loss of consciousness or convulsions that can lead to injury.
Immediately discontinue playing and consult a doctor if you experience any of these symptoms. Parents should
watch for or ask their children about the above symptoms.

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Safety
K-FORCE products have been designed with the greatest concern for safety.
•Do not use the system or accessories near water
•Do not allow small particles or liquid particles or other small objects to get into the K-FORCE system or
any of its accessories
•Do not expose the system to dust, steam or smoke. Don't place or use the system in areas with
excessive smoke or dust.
•Don't expose any K-FORCE components to high temperatures, high humidity, or direct sunlight.
•Don't place any K-FORCE components on unstable surfaces, or surfaces subject to vibration.
•When carrying a K-FORCE component, be careful to have a good grip in order to avoid the fall of the
system which may cause damage or injury.
•Never disassemble or modify the system or accessories. Use the system according to the instructions
in this documentation or any other documentation provided by KINVENT. No authorization is provided
for any modification, analysis of circuit or mechanics configurations. An unauthorized modification will
void your warranty.
General Operating Conditions
Operating Environment
K-FORCE devices must be used indoors. K-FORCE must be used only in clean, dry rooms with leveled floors.
Make sure you have plenty of space around you when you use it.
Storage, Packaging and Transportation
Temperature: -10 ºC to 40 ºC
Air Humidity: 30 % to 75 %
Calibration
K-FORCE gives you metrics on the human muscular force. K-FORCE is sold already calibrated, to make it easier
for you.
We recommend that the product be tested for calibration at least once a year. For more information on
calibration, please contact your K-FORCE dealer.

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K-FORCE app
To install the KFORCE app you need a smartphone or a tablet with at least Android 5.0 or iOS 10.0 and
Bluetooth Low Energy. Prefer devices with large screens (7'' or more).
You can find the app in Google Play Store App Store by clicking KFORCE. Once in a while check for updates in
the app, as you can obtain access to more features.
When the app is installed, please accept all notifications.
To open the app, select the icon on your desktop. Welcome to the home screen!
Home screen
Figure 1, Home Screen
Create a new participant with or select an existing one.
Once you have selected your participant, you can start exercising selecting the right device.

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Participant Selection and Creation
Figure 2, Participant Selection and Database
In this screen you can create, select or edit a participant. You can either choose to do a rapid assessment
clicking on (in this case the measurement is not saved in the database) or to work
with a patient profile (in this last case the database of the patient will be updated after the measurement of
the day).
In order to create a participant, click on . You can delete a participant by clicking on .
You can select an existing participant on the Participant selection zone.
Participant ’s history
When you are in the patient’s profile you can do an exercise and check the participant's previous results in the
database. To do that, click on any of the existing exercises. The exercises are organized by their respective K-
FORCE device.

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Below you can see an example of a Grip exercise done once a week during a month. You can watch
the progression of Mr Natsios left hand following a cerebral palsy rehabilitation program (fictive patient). To
check the repetitions in one day, just click on the day's dot.
Figure 3, Database Results
The names shown are fictive. Please notice that your personal data is not communicated to other devices.
You have now selected your participant. Let's check some basic exercises!
Basic Exercise Screen
Check often for app updates as you can obtain access to more features and exercises.
Once you have selected your participant, and your device, you can be directed to the customizing exercise’s
screen. You can personalize the target (calculated following norms based on age and gender). You can also
customize your assessment with sets, reps, workout and rest parameters.

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Once you have customized your assessment, you are directed to the basic Exercise Screen which is
useful for obtaining practical metrics on your participants accompanied with an acoustic and visual feedback.
After having turned on the device, the pairing is automatically done.
While your device is connecting, don't load the device, don’t step on the device, don't move the device and
don't put force on the device.
Figure 4, Basic Grip Exercise Screen
Info on this screen:
The manometer shows the force applied on a K-FORCE device in real-time. On the right top
corner you can check the device connection state . Click on to see the
details of the exercise choosen.
You can follow-up the results of each repetition, such as Max Force, Average Force and Success Percentage
(amount of time when Force is above Target)
Control the exercise state through the Buttons "Reset" and "Go/Stop".
Check one limb at a time. It is very important to properly choose the correct limb side (right or left) as this will
affect the database results.
You can stop an exercise even before completing the total amount of repetitions asked in the first place. Just
click on "Stop". The work done will be saved in the database
Check your results in the database as shown previously.

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K-FORCE Grip
K-FORCE Grip is used for the evaluation of hand grip strength. You can
assess maximum isometric strength as well as fatigue. Grip strength is
very important in sports and in rehabilitation for grabbing, lifting and
throwing and should be assessed often after hand trauma or surgery.
The device has an ergonomic elliptic shape for a better grabbing with
an external diameter from 40 to 45 mm and can record grip strength
up to 70 kg.
Benefits
K-FORCE Grip is equipped with electronic force
transducers and gives you real-time biofeedback
on your tablet or smartphone through the K-
FORCE app. Therefore, you can set strength
objectives to your patient and motivate him
through the process of rehabilitation. You will,
then, follow-up your patient's progress through
the K-FORCE interactive database.
The device is small, lightweight and mobile. Consequently, it can be used also by ambulant
professionals, such as physiotherapists and personal trainers.
Technical Features
Minimum Requirements
Android 5.0+ and iOS 10.0+, Bluetooth Low
Energy
Weight
200 grams
Dimensions
45 x 55 x 160 mm
Wireless Range
Up to 20 meters
Max Force
90 kgs
Battery
1h30m of autonomy, 15 min for charging
Power supply
Li-Po Battery 150 mAh
Radiated output Power
Max. 5 mW
Wireless transmission Frequency
2.4 GHz band (Bluetooth Low Energy)

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Get Started
On one part of the device you'll notice a micro-USB port used for charging, 1 LED for the charging state, 1 LED
for the working state and one push-button.
You can charge your Grip device through the micro-USB cable provided or with any other regular micro-USB
charging cable. You may have a charger already; many new mobile phones and other mobile products come
with an IEC 60950 compliant USB charger.
While charging, a blue LED is on. Once the charging is completed, the LED turns white.
Disinfect K-FORCE Grip prior to use, using antiseptic alcohol wipes.
In order to turn on K-FORCE Grip, press the push-button. You'll notice a green flashing LED. Your Grip is on!
Your Grip will turn off after 3 minutes of inactivity.
Figure 5, K-FORCE grip port and LEDs
Once the device is turned on, select the Grip Device Exercise in the Home Page.
While your Grip is connecting, don't load the device, don't step on the device, don't move the device, and
don’t put force on the device.

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K-FORCE Muscle Controller
K-FORCE Muscle Controller is perfect for a rapid evaluation of your patient's or
athlete's muscular force. It is an –user-friendly portable muscular dynamometer.
You can use it in your cabinet, clinic or even at your patient's home.
The device has an ergonomic shape with adjustable straps for a better hand
fixation, and a cushion that can be removed and disinfected. K-FORCE Muscle
Controller can also be fixed on hard surfaces such as a wall in order to use it as a
contact pressure dynamometer. The device has a contact surface of 100 x 140 mm
and can record contact forces up to 70 kg.
Benefits
K-FORCE Muscle Controller is equipped with electronic force transducers and gives real-time acoustic and optic
bio-feedback on your Smartphone or Tablet through the K-FORCE app. Through its Target oriented exercises,
you can set objectives to your patient and encourage him to surpass
himself. The app saves your participant's results. You can then
follow-up his progress on Maximal Force, Endurance and muscular
Symmetry on the app's database.
The device is small, lightweight and mobile. Therefore, it can
be used also by ambulant professionals, such as
physiotherapists and personal trainers.
Technical Features
Minimum Requirements
Android 5.0+ and iOS 10.0+, Bluetooth Low
Energy
Weight
300 grams
Dimensions
60 x 100 x 140 mm
Wireless Range
Up to 20 meters
Max Force
90 kgs
Battery
1h30m of autonomy, 15 min for charging
Power supply
Li-Po Battery 150 mAh
Radiated output Power
Max. 5 mW
Wireless transmission Frequency
2.4 GHz band (Bluetooth Low Energy)

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Get Started
Before using it for the first time, you must install the cushion provided. The cushion can be very easily installed
thanks to the Velcro material on both surfaces.
Next, configure the strap length according to your hand and place it over it. Otherwise, you can attach K-
FORCE muscle controller on any flat surface for special exercising.
The cushion can be removed for cleaning. Use antiseptic alcohol wipes to disinfect the cushion prior to use.
On one part of the device you'll notice a micro-USB port used for charging, 1 LED for the charging state, 1 LED
for the working state and one push-button.
To change the grip, bring the plastic tab toward you and slide the plastic piece out of the muscle controller.
Drag it in the desired direction until the tab comes back to lock.
You can charge your Muscle Controller device through the micro-USB cable provided or with any other regular
micro-USB charging cable. You may have a charger already; many new mobile phones and other mobile
products come with an IEC 60950 compliant USB charger.
While charging, a blue LED is on. Once the charging is completed, the LED turns white.
To turn on K-FORCE Muscle Controller, press the push-button. You'll notice a green flashing LED. Your Muscle
Controller is on! Your Muscle Controller will turn off after 3 minutes of inactivity.
Once the device is turned on, select the Muscle Controller Device in the Home Page. Select the body part you
want to exercise and then select one of the proposed exercises.
While your device is connecting, don't load the device, don't step on the device, don't move the device and
don't put force on the device.
Figure 6, Leg Exercises with K-FORCE muscle Controller
Adjustable straps
USB Plug & LEDs
Removable & washable silicon
cushion
Power button
Handle direction
modification

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K-FORCE Plates
K-FORCE Plates is an innovative product for rehabilitating balance and assessing lower
limb muscular symmetry and strength. K-FORCE Plates is easy to install and to connect.
The K-FORCE app's protocols evaluate important balance and lower limb
strength factors such as: left and right lower limb loading, balance
proprioception, center of pressure control and behavior, max. strength
and symmetry. Each plate has a surface of 320 x 160 mm and can
record forces up to 300 kg (600 kg for the pair).
Benefits
K-FORCE Plates is equipped with electronic force transducers and transmits real-time acoustic and optic bio-
feedback on your smartphone or tablet through the K-FORCE app. This product exploits the new technologies
of Internet of Things and Rehab-Gaming.
This device turns rehabilitation into a game, while giving
important metrics to the therapist or trainer.
It also measures the progress in lower limb strength as
well as symmetry through its intuitive app.
K-FORCE Plates are lightweight and can be used also by
ambulant professionals, such as physiotherapists and personal trainers.
Technical Features
Minimum requirements
Android 5.0+ and iOS 10.0+, Bluetooth Low
Energy
Weight
1600 grams
Dimensions
Each Plate 30 x 320 x 160 mm
Wireless range
Up to 20 meters
Max force
300 kgs for each plate, 600 kgs for both
Battery
5 hours autonomy, 45 min charge
Power supply
Li-Po battery 600 mAh
Radiated output power
Max. 5 mW
Wireless transmission Frequency
2.4 GHz band (Bluetooth Low Energy)

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Installation
Install K-FORCE Plates according to the exercise programmed.
On the floor
This configuration is ideal for balance exercises. You can lay K-FORCE Plates on the ground either one touching
the other or at distance. This increases the difficulty level of balance exercises, as you can work on your lower
limbs muscular force on the same time.
Figure 7, Configuration of K-FORCE plates on the floor
On vertical surface
K-FORCE Plates can be attached on a vertical surface in order to measure upper limbs muscular strength, or
even on weight lifting machinery such as a Leg Press Machine. To this end, use Velcro sticks with at least 200
cm2surface. For your safety, please make sure that K-FORCE plates are well fixed on vertical surfaces before
using.

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Get started
Each Plate is fitted with a micro-USB port used for charging (1 LED for the charging state, 1 LED for the working
state and one on-off button).
You can charge K-FORCE Plates devices using the micro-USB cable provided or with any other regular micro-
USB charging cable. You can also use any IEC 60950 compliant USB charger provided with mobile phones and
mobile devices.
While charging, a blue LED is on. Once the charging is completed, the LED turns white.
Disinfect K-FORCE Plates prior to use, using antiseptic alcohol wipes.
To switch on K-FORCE Plates, press the on-off button on each force Plate. You'll notice a green flashing LED.
Your K-FORCE Plates are on! Your K-FORCE Plates will switch off after 3 minutes of inactivity.
Figure 8, K-FORCE Plates USB port and LEDs
Once the device is switched on, go to home page and select Plates Device.
Balance exercises
Check regularly our website for updates and download new features and exercises.
Select one of the exercises available on your K-FORCE app.
Figure 9: examples of exercises with the K-FORCE app
Warning: While your device is connecting, don't load the device, don't step on the device, don't move the
device, don't put force on the device.

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Postural assessment
Use this exercise to measure the weight distribution between both legs. Data obtained
include trajectory and amplitude of the pressure center, and average weight distribution.
Figure 10 : Results of postural assessment

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Static balance exercise
In this exercise of weight distribution, you can set some parameters, such as:
•level of difficulty
•distribution target to be achieved
•work time
•pause time
•number of repetitions
K-FORCE Plates also monitor the execution of the exercise (waiting for input, exercise stopped, break time,
working time).
This exercise is useful to work on the load of each limb as well as on weight distribution. The device provides
real-time acoustic and optic bio-feedback.
While your device is connecting, don't load the device, don't step on the device, don't move the device,
don't put force on the device.
The blue strip represents the target to reach, and the orange cursor shows the real-time weight distribution
and load applied on K-FORCE plates.
You can monitor the evolution of performance after each exercise, the
score obtained measured against the target set. Monitor the progress of
the exercise using buttons "Reset" and "Go/Stop".
Check the results in the database.

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Dynamic Balance Exercise
You can exercise dynamic balance in motion aided by bio-feedback.
While your device is connecting, don't load the device, don't step on the device, don't move the device,
don't put force on the device.
You can select various scenarios to make the rehabilitation and exercising as playful as possible. Example:
collect all the necessary ingredients to produce a vegetable soup. You'll obtain important metrics, such as
exercise success, trajectory of the center of pressure, exercise timing, problematic balance zones.