Mindfield eSense Muscle User manual

QUICK GUIDE
Version 1.0.0 | 12.05.2021

2

3
We are glad that you chose our product. With the eSense Muscle and the
accompanying eSense (Web) App, you have chosen a high-quality product
that benefits from our years of experience with biofeedback.
The instructions for use include essential information. Please read this
Quick Start Guide carefully. See the website www.esense-muscle.com
for further instructions or find them inside the eSense mobile app.
You can find a complete product description on our website
www.mindfield.de
under "Biofeedback" => "Products" => "eSense" => "eSense Muscle"

4
Content
Scope of delivery of the eSense Muscle: .......................................................5
Commissioning: eSense Muscle ..................................................................10
Notes on the internal battery........................................................................15
Cleaning and care........................................................................................17
Mindfield eSense Mobile App.......................................................................18
Mindfield eSense Web App for Desktop Devices (Windows, Mac, Linux).....20
Mindfield eSense Web App for mobile devices (Android or iOS) ..................23
General information about EMG (electromyography) biofeedback training...26
The EMG signal...........................................................................................28
Abstract of an EMG Biofeedback Training ...................................................30
Troubleshooting connection problems..........................................................33
Technical data about the Mindfield eSense Muscle......................................35
EC Declaration of Conformity for the Mindfield eSense Muscle....................38

5
Scope of delivery of the eSense Muscle:
•Mindfield® eSense Muscle Sensor incl. 1600mAh Lithium Polymer
battery for approx. 12 hours of continuous operation
Switch 1 (Black):
ON/OFF
Short press = ON
Long press (5s) = OFF
LED
Switch 2 (Gray): Mode
Ground (Ground)
Chann
el 1
Chann
el 2

6
•Electrode cable set for a connection of up to five electrodes
DIN safety
plug
Standard push button
connectors for any type of
EMG/EKG surface
electrodes

7
•USB-C charging cable and charger
Please only use the enclosed charger!
Fully charge the eSense Muscle before first use! Observe the notes in the
manual!

8
•Bluetooth dongle for PCs that do not have Bluetooth (please refer to
the enclosed instructions)
•50 pieces EMG surface electrodes
These are disposable
electrodes for single use!
Please always close the
package airtight so that
the electrodes do not dry
out.
First press the electrodes
against the cables before
sticking them to the skin.

9
•50 pieces alcohol swabs for skin cleansing
•eSense Muscle Web App by Mindfield, available at
www.esense-muscle.com
First, read this Quick Start Guide entirely before using the
eSense Muscle Web!
Clean the skin before sticking
on the EMG disposable
electrodes. These alcohol
swabs degrease the skin. This
results in better signal quality.

10
Commissioning: eSense Muscle
1. Please remove all products from the packaging.
2. Recharging: Please fully charge the eSense Muscle before use. To
do this, use the included USB-C cable and the charger. Then press
once briefly on the black switch 1 on the top of the eSense
Muscle. Then the LED should light up red. Charge the eSense
Muscle until the LED turns green or goes out.
3. After the eSense Muscle is fully charged, you can start using it for
the first time. A full charge can take up to five hours. During an
ongoing charging process, the eSense Muscle cannot be used for
measurement for safety reasons. If you plug in the charger during a
running measurement, the running operation is terminated and the
device switches to the charging mode.

11
4. Apply the electrode cables and electrodes:
Remove the electrode cable set from the package. There are five
electrode cables included: black, white, yellow, red and green.
The yellow electrode cable is the ground electrode!
For a 1-channel measurement, please use the electrodes black
(channel 1+), white (channel 1-) and yellow (ground).

12
For a 2-channel measurement, please use the electrodes black
(channel 1+), white (channel 1-), yellow (ground), red (channel 2+)
and green (channel 2-).
Two examples of a one-channel measurement:

13
An example of a two-channel measurement:

14
5. Clean the skin areas where you want to place the electrodes with
the enclosed alcohol swabs or isopropyl alcohol.
6. Take the appropriate number of EMG surface electrodes from the
enclosed package. Clip the electrodes to the cable ends before
placing them on cleansed skin.
7. Remove the protective film from the electrodes and stick them to
the skin. If you have not already done so, plug the electrode cables
into the matching colored sockets on the eSense Muscle.
8. Necessary: close the package of the EMG surface electrodes
airtight again! Otherwise, they will dry out in a short time and stop
providing correct values.
9. Now the eSense Muscle is ready for use and connected to the
eSense (web) app. For more information, please refer to the
corresponding chapter.

15
Notes on the internal battery
The eSense Muscle uses an internal Lithium Polymer battery with 3.7V
operating voltage. The eSense Muscle is charged with five volts via the
included USB-C cable and USB charger.
You can read the current state of charge in the eSense (web) app. To save the
battery, the device switches off after two minutes of inactivity; i.e., without
Bluetooth connection or recording to SD card.
Changing the battery by the user is not provided. The manufacturer can only
replace the battery.
Important:
1. Never open the eSense Muscle. This is not provided for.
2. Use the included charger to charge the eSense Muscle as other
chargers may damage it.

16
3. If you do not use the eSense Muscle for a more extended period,
always store it in the enclosed case. Charge it fully first when you
start it up again.

17
Cleaning and care
For cleaning and care, there are the following essential tips:
•Do not drop or use force on the eSense Muscle.
•Avoid exposing the eSense Muscle to hot temperatures or sunlight.
•If the eSense Muscle is stored near freezing, allow it to warm to room
temperature before subsequent use.
•Do not try to open the housing of the eSense Muscle.
•Avoid dirt getting into the connection sockets.
•If you do not use the eSense Muscle for a long time, you must fully
charge it before using it again.
•The enclosed EMG surface electrodes are disposable and should
not be reused.

18
Mindfield eSense Mobile App
The eSense Muscle includes the Mindfield eSense Mobile App,
which you can download for free from the Google Play Store
(Android) or Apple App Store (iOS). Just search for "Mindfield
eSense".
The app offers a wealth
of features for practical
biofeedback training.
Essential functions are displaying measured values as a bar graph and
oscilloscope, feedback via video, music, using sounds, vibration and light with
the help of smart bulbs (Bluetooth and Philips Hue).
You receive a comprehensive evaluation after each measurement and
compare measurements with each other in the archive and export them as
CSV files and PDF reports.

19
The manual explains the app in detail with all its functions.
Please read it carefully before the first session.
You can find the complete manual on our website www.mindfield.de under
"Biofeedback" => "Products" => "eSense" => "eSense Muscle"

20
Mindfield eSense Web App for Desktop Devices
(Windows, Mac, Linux)
For the first time, the eSense Muscle comes with new software—a
web app that runs exclusively in a web browser.
You do not need to install any software. All you need is:
1. A PC or notebook with Windows 10, Mac or Linux.
2. A working Bluetooth connection in this PC or notebook.
3. A web browser that supports "Web Bluetooth" so you can
connect to our eSense Muscle via Bluetooth. As of April
2021, these are:
a. Google Chrome