Biomechanical Testing, Training and Therapy: CON-TREX® MJ


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Multijoint module for testing and training the major joints in the open kinetic chain.

With the control module PM and a wide range of adapters which are needed for the scheduled tasks, the CON-TREX® MJ multijoint module is a versatile, rotatory testing, training and therapeutic system to test and train all major joints of the upper and lower limbs in the open kinetic chain. The highly flexible mechanism with excellent operator guidance makes objective and reproducible test results possible in every work mode. The mechanical design of the CON-TREX® MJ is extremely user-friendly: the patient’s seat and backrest can be electronically adjusted at the touch of a button. Airex cushions offer a maximum of comfortable seating even during long training sessions, feature anti-slip properties and are easy to clean. The CON-TREX® MJ can also be delivered with classic upholstered seats and backrests, according to choice.

Training while sitting or standing, measurements in the prone or supine position: CON-TREX® MJ offers maximum flexibility in every case. It enables the analysis of both the static and dynamic strength of a joint and the resulting targeted functional muscle-strength training and improvement to skills of coordination with possible monitoring and correction during training or therapy.

Depending on the direction of motion, the following muscular load types exist in dynamic modes: concentric/concentric, concentric/eccentric, eccentric/concentric and eccentric/ eccentric. Unique to CON-TREX® are the combined load types: con/CPM, CPM/con, CPM/ecc and ecc/CPM.

The dynamometer technology of CON-TREX® guarantees previously unequalled precision and sets new benchmarks when it comes to providing quality in diagnostic and therapeutic work. It functions play-free and with a 100% digitally controlled drive system. The controls are optimised to be simple in usage and easy to clean, while making sure that the risk of injury is kept to a minimum. The entire drive and controls system can be adapted at any time to future trends in physiotherapy thanks to the easy software upgrade and smoothly updated to the latest computer technologies.

In its ballistic mode, CON-TREX® has a one-of-a-kind controls system. Here, in order to compensate for the inertia of moving body parts, the expected motional development is calculated beforehand and the generated “inner strength” is continuously equalised. To this user, this means the following: the motion can be executed functionally, realistically and for longer at the desired target speed – particularly with minimal effort, at high motion speeds or when large body segments are being moved. CON-TREX® ballistic mode enables both isokinetic and isotonic work.

Another advantage is the active compensation for gravitational force during training and diagnosis. Patients with little strength are often unable to move individual segments of their bodies without assistance. This means that active compensation for these static weight influences is required. While the movement is being performed, the dynamometer can continuously reduce the external forces or even compensate for them completely; this produces a “gravity-free”’ situation for the patient where every movement can be performed with minimal expenditure of force.

CON-TREX® software also offers the option of merely measuring the forces acting on the movement, without active compensation. When evaluating data, the measured values can then be displayed as “gravity-corrected”.

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