Inclusion Criteria:  GI (Individuals with Parkinson Disease):  Individuals diagnosed with Parkinson's disease for at least 6 months; Age between 50 to 70 years; Classified on the Hoehn and Yahr scale from 1 to 3; Rigid-akinetic and/or tremor-dominant type; Individuals who have preserved their cognitive skills, assessed by means of the Mini Mental State Examination (MMSE) and who have a cut-off score of 23/24 (FOLSTEIN et al., 1975).  GC (Healthy individuals):  Age between 50 to 70 years; Individuals who have preserved their cognitive skills (with the same cut-off score as the GI in the MMSE); Walk independently.  Exclusion Criteria:  GI (Individuals with Parkinson Disease):  Individuals who have other associated musculoskeletal and neurological disorders; Individuals with dementia installed; Individuals with pathologies and injuries associated with the skin that make it impossible to enter the aquatic environment; Individuals with hydrophobia.  GC (Healthy individuals):  Individuals who have musculoskeletal and neurological pathologies; Individuals with dementia installed; Individuals with pathologies and injuries associated with the skin that make it impossible to enter the aquatic environment; Individuals with hydrophobia.