Pistons
The active resistance exerted by the mobile platform can be changed thanks to four oilhydraulic pistons located on the cardinal axes (anterior-posterior and right-left). By adjusting the mobile platform’s active resistance the operator can work on two very distinct levels:

1. On the tonic-trophic level. By increasing or decreasing the resistance exerted by the mobile platform, the patient, in no-load mode, is mostly engaged in joint mobility and muscle recruitment work.
   
2. On the progressive destabilisation level. By increasing the resistance exerted by the pistons, the patient, in load-application mode, will be capable of executing a proprioceptive exercise that is in accordance with the patient’s perceptive conditions. Gradually, when the patients motory conditions are ready, the resistance exerted by the pistons can be decreased, so that it is more difficult
   to manage.
   

Furthermore the active resistance exerted by the mobile platform can be changed in its various different sectors, to enable diversifi ed treatment in relation to specific treatment requirements.
By way of example, the right-left pistons can be tightened (to level 8) whilst the anterior-posterior pistons can be left at a softer level (i.e. at level 1). In this unit configuration, the patient will be able to move the mobile platform very easily in
fl ex-extension positions but movement will be restricted in the prone-supine positions.