eSense Muscle Home Edition (1-Kanal EMG Biofeedback mit Web App)

Heart Rate Variability
Heart rate variability (HRV) refers to the ability to change the frequency of the heart rhythm. Even at rest, there are spontaneous changes in the time between heartbeats.
A healthy person constantly adapts the heart rhythm to current requirements. In addition to physical exertion, such as sport or physical work, psychological exertion such as stress also results in an increase in the heart rate. The heart rate sinks again when the strain is relieved and the body relaxes. In humans, heart rate variability ranges from 10 (low, a sign of stress) to 30 (high, a sign of relaxation).
The more our body is able to regulate the heart rate (the greater the heart rate variability), the healthier we are. If the heart beats only rigidly, a person is about to die.
The measurement of heart rate variability is a large field in cardiology, sports and coaching. With the eSense Pulse, we want to focus on biofeedback training, i.e. improving heart rate variability. To describe the current state and progress of the training, the eSense app also provides the essential statistics and analyses of HRV.
 
Heart Rate Variability and Biofeedback Training
The aim of HRV biofeedback is to increase heart rate variability, specifically its amplitude. In other words, to maximize the difference between low heart rhythm and high heart rhythm in the interplay of inhalation and exhalation, rest and demands.
If respiration is included, the eSense App offers various ways to visualize it and to define respiration in a certain rhythm. The coupling of heartbeat and respiration is greatest in most people when breathing at about 4.5 to 6.5 breaths per minute.
 
The eSense Pulse with the eSense App offers you

A precise 1-channel ECG with 500 Hz sampling (internal)
Transmission of RR distances in milliseconds at 5 Hz via Bluetooth Low-Energy
A chest strap that is comfortable to wear, washable and durable
Optimal skin contact with the help of supplied electrode spray
theoretically unlimited recording time (but some smartphones and tablets have problems with saving sessions which are longer than 2 hours. So there is no guarantee for recordings longer than 120 minutes and 24-hours measurements are impossible)
Unlimited number of sessions and users 
Extensive statistics on heart rate variability (time and frequency data)
Real-time Fast Fourier analysis with spectrogram
Breathing aid for breathing training with freely adjustable intervals, auxiliary tones and more
Export of measurement data as CSV file, compatible with other software programs for further analysis (e.g. Kubios)
Export of curves, diagrams and statistics as a PDF report.
To train and improve HRV, the app offers a wealth of biofeedback feedback on HRV amplitude: Bar feedback (HRV or breathing aid), Curve feedback (HRV and breathing aid), Video feedback (videos included and your own videos may be used), Music feedback (music included and your own music may be used), Tone feedback (change of pitch by the measured values), Tactile feedback through vibration (only smartphones, tablets cannot vibrate), Feedback from smart bulbs (Bluetooth bulb and Philps Hue products are controllable.)
Set any number of markers during a recording
Different, premade training procedures are included in the app
Free training according to your wishes with any biofeedback variant or several at the same time
Extensive in-app help and manuals
Regular updates of the app
Integration with our eSense Respiration to record respiration during the HRV measurement

 
Quick Guide to Usage

When you buy the eSense Pulse you can download our free app from the App Store (Apple®) or Google Play (Android).
You can also download it in advance, but the app can not be effectively used without the sensor)
Put on the chest strap as shown in the manual and adjust it to the correct length. The strap should be tight, directly under the chest muscles, but not uncomfortably tight or squeezed. 
Once you have adjusted the belt, remove it again to apply a small spray of the enclosed electrode contact spray to each electrode (but avoid 'bridging' as shown in the manual).
Start the app and click "Start", the measurements will begin.
Please carefully read the instructions within the app or the manual to get the best out of biofeedback training.
Have fun with the eSense Pulse! 

 
The eSense App
The price of the eSense includes in parts the hardware and also the software (the eSense app) all in once. We spend huge amounts of money for the programming and continuous development of the app. However, the eSense app is available for free in the App Stores. Our customers should not pay twice at different locations and, moreover, it is unusual for most people to pay a larger sum for an app. The eSense offers unbeatable value for your money and is a unique, high-precision biofeedback device with many features.
 
Procedures
A Procedure consists of several assembled modules. With this feature of our eSense app you can build the perfect individual relaxation guide, a stress test, a predefined biofeedback training or use it for research.
There are many possibilities. During a procedure, your pulse will be recorded and afterwards you see your results for each module and in total.
 
New: Smart Bulbs
The eSense app can support biofeedback via smart bulbs. Smart bulbs can change their colors and brightness and can be controlled via Bluetooth. In combination with the eSense app this enables you to the light from the bulb as an indicator of your level of stress or relaxation.
Currently the eSense app supports the Magic Blue® and Phillips Hue® smart bulbs. Both are smart bulbs which can be controlled via Bluetooth. The color as well as the brightness can be adjusted. From within the eSense App, you can connect to the Magic Blue or the Phillips Hue and use it in your biofeedback session.
 
Technical details

Sample frequency (internal): 500 Hz, RR intervals with 5 Hz to eSense App
Measuring range: 30-240 BPM +- 2 BPM 
Internal error correction 
Operating range: 5-40 °C, <= 95% relative humidity
Belt made of polyamide and conductive silicone + TPU for the electrical contacts

Apple, iPhone, iPad, iPod touch are trademarks of Apple Inc., registered in the U.S. and other countries. iOS is a trademark or registered trademark of Cisco in the U.S. and other countries and is used under license.
 
Engineered in Germany

The eSense is completely engineered at Mindfield in Germany.