Frequently Asked Questions


Can I use FlexVolt for muscle relaxation training?

Absolutely. FlexVolt sensors use the EMG signals from your muscles to give you an objective measure of your muscle tension. Monitor tension as you go through relaxation exercises, or set thresholds in the FlexVolt app to alert you when your muscles are becoming too tense.

Can FlexVolt help me reduce my neck/back pain?

Possibly. If your neck/back pain is coming from improper posture and muscle overuse, such as when hunching or looking down at your computer screen or mobile device, then FlexVolt could help you work on better posture habits by showing you when you are in a problematic position/posture. Note that neck and back pain can occur for many reasons, and if the reasons are not related to muscle overuse, then FlexVolt may still help you with muscle relaxation, but isn’t likely to help with your pain problem!

Why Electromyography with FlexVolt?

The FlexVolt project started with a desire to alter human-machine interaction.  The initial prototypes were developed with the goal of providing an intuitive new way to interact with computers via muscle signals.  However, after many product demos and interactions with physical therapists, it became clear that the best application of FlexVolt EMG sensors is in physical therapy biofeedback, particularly for home-use cases.

Aren’t there already systems for measuring these signals?

Electromyography is not new, but the currently available systems are complex and expensive and usually only seen in medical centers or research laboratories.  FlexVolt breaks those barriers to make EMG and biofeedback accessible to everyone.  The FlexVolt is a first attempt at reaching a loftier goal – making biomedical technology affordable and available for in-home use.

How does FlexVolt compare to other low-cost EMG sensors?

The Myotrac EMG sensor is one of the only other home-use biofeedback sensors on the market.  It offers feedback via sound or LEDs, but does not interface with mobile devices.  At $500 for a single-channel sensor, it is significantly more expensive than FlexVolt.

Is it Safe?

Yes.  FlexVolt sensors are battery powered, and the sensor circuitry is automatically disconnected when charging the battery.  This means that there is never a potential for electrical connection between the patient and building power sources.

Will FlexVolt Devices be registered with the FDA as medical devices?

Yes.  The long-term plan is to register with the FDA to provide assurances for physicians and patients alike that FlexVolt is safe and reliable.