Modification of the Trust-M complex for muscle training and contracture management through rehabilitation exercises and biofeedback.


BFB Training Device for Rehabilitation Exercises with biofeedback is designed to restore locomotor functions through rehabilitation exercises involving exercise monitoring via biomechanical sensors.


Neurology: paralysis, muscle contractures, conditions after a stroke.

Traumatology/orthopedics: to restore joint mobility after prolonged immobilization of the limbs, joint injuries, fractures, osteosynthesis, endoprosthesis; to restore and train tendons for post-surgery joint development.

Rehabilitation exercises: increase motivation to exercise, control of proper performance of exercises.

Cardiology: after myocardial infarction.

Sports/fitness: control of proper performance of exercises.


Stand-alone biomechanical sensors for recording motion parameters with EMG and FES functions.

No special requirements for facilities, suitable for home use.

Ability to combine with orthoses and training machines.

Availability of modification for recumbent patients with the ability to use a VR helmet.

Track movements in 3 planes.

Rehabilitative management of joint contractures in 3 axes of rotation.


Main technical characteristics


Number of channels for recording movements in one complex


Record movements and rotations in 3 axes


Sampling frequency 

At least 1000 Hz

Biomechanical sensor overall dimensions

No more than 63 x 38 x 20 mm

Sensor battery life

Up to 6 hours without recharging

Type of sensor connection to the PC


Training Techniques for BFB Rehabilitation Exercises

“joint rotations” “cyclic movements”

“symmetrical movements” 

BFB EMG game content visualization

PC monitor, projector, TV, wearable VR helmet

Mode for viewing and analyzing the training results


Database of trainings and patients


Use of the BFB-PT training device

Neurology - conditions after a stroke, cerebral palsy (ICP), peripheral neuropathies, craniocerebral injuries, Parkinson's disease, impaired coordination of movements, muscle contractures

Traumatology/Orthopedics - restoration of joint mobility after prolonged immobilization of limbs, after joint injuries, fractures, burns, after osteosynthesis, endoprosthesis replacement, for recovery and training of tendons, for joint development after surgery.

Physical therapy - increasing motivation for exercise, monitoring the correctness of exercise procedures.

Cardiology - after a heart attack.

Sports/Fitness - control the correctness of the exercises.


Capabilities of the BFB-PT training device

- registering joint movements

- assessing degree of contracture and development

- training of joint movements in all possible directions

- simultaneous training of several segments (for example, flexion-extension in ankle and hip joints)

- spine training

- balance training

- displaying the status of the monitored function in real time and training this by BFB in play mode

- controlling the correctness of exercises

- regulating loads based on the patient's physical condition

- creating individual training patterns for particular muscle groups

- documenting the results and assessing the recovery progresss


The BFB-PT training device includes wireless biomechanical sensors, which let you record movements, position, speed and angular values ​​in joints. These biomechanical parameters are trained due to special physical exercises in play mode, based on the BFB method, when the feedback to the patient's actions is displayed in real time. This ensures control of the correctness of the exercises and creates favorable conditions for the patient's active participation in the rehabilitation process. The training of movements can be used in all possible directions and, if there are enough sensors, in all large joints of a limb at the same time. Thus, an opportunity is created to develop contractures, restore biomechanics of movements, including training the skills for walking. In addition, muscle trophicity is improved, fracture consolidation is accelerated, muscle atrophy is prevented.

Trust-M biomechanical sensors high frequency register the angles of inclination and determine the spatial position of the segments. By placing the sensors on different body segments (head, torso, chest), you can perform exercises selected by the doctor for different parts of the spine - forward, backward, right, left, twisting. The results of the training are back muscles strengthening, spine stability increasing in the trunk and waist, pain reduction, improving coordination of motions, flexibility, joints recovery of the spine, correct motor stereotypes formation. 

To conduct balance training, you can set the angle of inclination of the body and smoothly dose the load. It is possible to use an additional platform for to improve the effectiveness of such exercises, more detailed in the section of "Balance System TrustMotion".

The convenient software of the BFB training device allows you to create individual training schemes for certain muscle groups, document the results in the form of visual tables and estimate the dynamics of recovery.


Benefits of the BFB-PT training device 

- autonomous biomechanical sensors to record motion parameters with EMG and FES functions

- the possibility of combination with orthoses and mechanical training equipment

- tracking movements in 3 planes

- development of joint contractures in the 3 axes of rotation

- modified versions for recumbent patients with the possibility to use a VR helmet

- lack of special room requirements, may be used at home


In addition to recording movement parameters, "Trust-M" biomechanical sensors provide for the registration of electromyograms and tremors enabling muscle tone to be assessed, asymmetries to be identified, spine load distribution to be assessed and rehabilitation exercises selected correctly. Moreover, it makes it possible to train muscle activity using the BFB method, which significantly increases exercise effectiveness. See details on the BFB-EMG training device.

The sensors provide the function of electrostimulation, which, if necessary, can become an additional method of effect on muscles. So, for example, to generate a hand grip function, an electrical impulse is applied to the muscle in the desired phase of muscle contraction.

"Trust-M" sensors can be combined with orthoses to fix joints and to regulate scope of movement, as well as with exercises on mechanical training equipment.

All movements are monitored in three planes, and rotations are recorded in three axes. This enables all kinds of movements in joints to be evaluated and trained - flexion and extension, abduction and adduction, pronation and supination.

Autonomous wireless sensors "Trust-M" small in size and lightweight, do not restrict movements, can be easily attached to the patient's body, and provide for comfortable use.

When a doctor prescribes a set of therapeutic exercises, the patient himself can use the trainer at home.

The BFB-PT training device which uses a virtual reality helmet is great for rehabilitating motor functions in bedridden patients.






Main technical specifications


47х38х20 mm

Net weight

45 kg


3.7 V Li-ion battery

Battery life

maximum 6 hours

Operation range of the control and data transmission channels

minimum 30 m

Number of biomechanical sensors

1-2 pc

Measurement of motion on 3 axes

maximum 2 channels

Range of the angular segment speed

minimum 2000 °/s

Measurement accuracy of the angular speed

minimum 1%

Calculation accuracy of the angles orientation

minimum 0.5 degrees

Registration of linear movements


Measurement of tremor on 3-axis

maximum 2 channels

Registration accuracy of tremor

minimum 2 mg

Sampling rate of motion detection channels

minimum1000 Hz

EMG measurement

optionally up to 4 channels

FES methods (electrical stimulation of muscles in motion)


Noises fed to EMG input

minimum 0.5 mV RMS

In-phase noise rejection

minimum 100 DB

Sampling frequency

minimum 1000 Hz

HF filter

0.1 Hz-250 Hz

LF filter

1 Hz-250 Hz

Network noise rejection filter

50Hz or 60Hz


Methodological possibilities


Three-dimensional registration of movements in joints and body segments


Three-dimensional registration of bends in the spine


Three-dimensional registration of tremors and accelerations


EMG surface recording


FES methods (electrical stimulation of muscles in motion)


Definition of the ranges of movements for training BFB (biofeedback)


Range and sensitivity of the BFB setting


Difficulty and level training setting


Methods of training BFB Therapeutic physical culture

"rotational joint", "circular motion", "symmetric motion", "the curves of the spine"

Methods of training BFB EMG


for 1 muscle, groups of muscles: the "flexors-extensors", "symmetry", "phase inclusion"

Creation of new user techniques, BFB training and biomechanical research


Control of correct performance of training and exercises


Monitoring of the amplitude and speed of exercises performance


Gaming scenarios for training motivation


Possibility of using 3D virtual reality helmets (including for bedridden patients)


Ability of using third-party gaming applications for BFB training


BFB with" one "and" two " degrees of freedom


Data recording, analysis and comparison of training results


Calculation of the main amplitude and phase parameters


Patient database


Muscle movements pattern analysis


Synchronous video monitoring


Reports generation


Database results


Reconstruction of movements in the form of "Skeleton model»



Delivery Set


The biomechanical sensor "TRUST-M"

1-2 pc

Battery charger

1-2 pc

Telemetry adapter with PC


Fixing cuff set


Software "Biomechanics Neurocor»


Software of a game application BFB (a set of game scenarios for training)


Software Patient Database


Intel processor-based PC with professional graphics adapter LCD monitor and printer


LCD panel or projector for 3D BFB


Specialized medical cart


User manual


User guide