INTRODUCTION: Patients with Parkinson's disease (PD) have severe airway obstruction, fatigue and respiratory muscle incoordination, reduced muscle mass and muscle weakness and fatigue, leading to exercise intolerance and reduced quality of life. OBJECTIVES: To assess and compare the lean body mass index (LBMI), spirometric variables, respiratory muscle strength and physical capacity of DP patients and healthy elderly. Also, verify which of these variables influence exercise capacity in patients with PD. MATERIALS ANS METHODS: Twenty-five individuals of both sexes were evaluated: ten DP patients (PD group [PDG]: 72.7 ± 10.0 years old) and 15 healthy elderly (Healthy group [HG]: 64.8 ± 6.7 years old), through spirometry, respiratory muscle strength, body composition and 6MWT. RESULTS: The PDG presented significantly lower values, forced expiratory volume in one second/forced vital capacity, maximum voluntary ventilation (MVV), muscle mass, maximal inspiratory (MIP) and expiratory pressures (MEP) and the covered distance in the 6MWT compared to HG. In PDG, moderately positive correlations significant (p < 0.001) were observed between MEP and MVV with covered distance in the 6MWT (r = 0.84; r = 0.67, respectively), and between the LBMI with MVV (r = 0.69). CONCLUSION: The patients of PDG had reduced muscle mass, respiratory muscle strength and endurance, and of physical capacity compared to healthy elderly. Also, expiratory muscle strength and respiratory muscles endurance influence physical capacity (measured by 6MWT), as well as muscle mass influence the respiratory muscle endurance in patients with PD. This way, we have found the importance of the 6MWT to become a standard method of assessment in clinical practice in patients with DP.
Parkinson's disease; Elderly; Physical exertion
