Parkinson's patients have postural disorders. These disorders are frequent in Martinique. Physiotherapeutic rehabilitation is essential because these disorders are generally non dopa-sensitive.

Postural disorders are very common in Martinique, in patients often having an atypical form of the Parkinson's disease. Physiotherapy rehabilitation is essential because these disorders are generally non-dopa-sensitive. Isokinetic muscle strength may reduce postural disorder in Parkinson's disease.

Isokinetic device rehabilitation promotes maximum muscular contraction at constant speed; the resistance of the machine continuously adapting to the force developed by the subject. As the spinal muscle strength gain is superior to conventional post-rehabilitation motor function, the improvement in postural instability should be greater than that achieved with conventional rehabilitation. A better postural support should thus result in a decrease in the risk of falling and an improvement in the quality of walking.

Inclusion Criteria:

• Patient with Parkinson's disease or atypical parkinsonian syndrome
• Age ≥18 years
• Patient with postural disorders with a cervical arrow> 6cm in the sagittal plane and / or the axis C7S2 different from 0 in the frontal plane
• UPDRS between 10 and 25/108.
• Antiparkinsonian treatment stabilized for 8 weeks
• MMS test> 25
• Insured person or beneficiary of social security

Exclusion Criteria:

• Patient with a neurological condition other than parkinsonian syndrome
• Patient with rheumatic disease
• Patient with a history of trunk surgery
• Patient with a brain stimulator
• Cardiac pathology not stabilized
• Incapacitated adult, or under guardianship, or under curatorship or under judicial protection curatorship