Exercise in water

Intervention: This is a non-randomized clinical study, where individuals will be allocated for convenience into two groups: healthy elderly group and people with Parkinson's disease, all individuals will have a control period of one month followed by 12 weeks of intervention. There will be no blinding or randomization, but the professionals responsible for the evaluation will not be the same as those responsible for applying the intervention. Altogether, it is estimated that 60 people will participate, with 30 participants in each group. The assessments will take place at three different times: 1, followed by the control period (one month); 2 (pre intervention), before the beginning of the PEFA and 3 (post intervention), immediately after the end of the Aquatic Physical Exercises Program (PEFA). Individuals in the intervention groups will participate in PEFA at moderate to high intensity twice a week, lasting approximately 45 minutes to 1 hour, for 12 weeks. There will be a period of 48 hours between one workout and another, for muscle recovery. The program will be divided into collection of vital signs before and after the intervention, approximately 10 minutes, warm-up for 10 minutes, main training for 15 to 30 minutes and cool-down for 10 minutes. In each session, the following pre and post intervention variables will be collected: blood pressure, peripheral saturation, subjective perception of exertion and dyspnea, heart rate before and after training. During training, a heart rate monitor (MC800 KIKOS Cardiac Monitor) will be used to monitor the training cardiac range and the Borg-10 scale for the perception of exertion and dyspnea, aiming at further analysis of the data and reducing risks to the participants.;E02.779.492 Primary outcome: It is expected to improve cardiorespiratory fitness after 12 weeks of intervention, verified by the 6-minute walk test, Manovacuometry, Spirometry, Heart Rate Variability, from the minimum detectable difference with a confidence interval of 95%.;Improvement of Balance and postural control is presumed, verified by the Mini Best Test, BERG Scale, Time Up and Go elucidated by the minimum detectable difference with a confidence interval of 95%.;It is speculated to find alterations in Sleep Quality through the Epworth Sleepness Scale, Pittsburgh Sleep Quality Index and Parkinson's Disease Sleep Scale, verified by the minimum detectable difference with a confidence interval of 95%.;It is believed in the increase in Muscle Function through the Laffayette methods (isometric muscle strength), Isokinetic Dynamometer (muscle strength), Sitting and Standing Test 5 times (strength and power of lower limbs) observed by the minimum detectable difference with confidence interval of 95%.;Changes in Depressive Symptoms and Cognition are believed through the Geriatric Depression Scale 15 and Montreal Cognitive Assessment, verified by the minimum detectable difference with a confidence interval of 95%.;The development of the Quality of Life and Activities of Daily Living is expected as exposed by the Parkinson's Disease Questionnaire-39 and sections II and III of the Unified Parkinson's Disease Scale, based on the minimum detectable difference with a 95% confidence interval. Secondary outcome: No secondary outcomes expected