Hélcio Kanegusuku1, Carla Silva-Batista1, Tiago Peçanha1, Alice Nieuwboer2, Natan D Silva1, Luiz A Costa1, Marco T de Mello3, Maria E Piemonte4, Carlos Ugrinowitsch1, Cláudia L Forjaz5. 1. School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil. 2. Faculty of Kinesiology and Rehabilitation Sciences, University of Leuven, Leuven, Belgium. 3. School of Physical Education, Federal University of Minas Gerais, Minas Gerais, Brazil. 4. Faculty of Medical Science, University of São Paulo, São Paulo, Brazil. 5. School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil. Electronic address: cforjaz@usp.br.
Abstract
OBJECTIVE: To investigate submaximal and maximal responses during maximal cardiopulmonary exercise tests in subjects with Parkinson disease (PD). DESIGN: Cross-sectional. SETTING: A PD association. PARTICIPANTS: A sample (N=68) of subjects with PD (n=48; mean age, 66±8y; modified Hoehn and Yahr stage between 2 and 3; "on" state of medication) and age-matched controls without PD (n=20; mean age, 64±9y). INTERVENTIONS: Maximal cardiopulmonary exercise test on a cycle ergometer. MAIN OUTCOME MEASURES: Oxygen uptake (V˙o2), systolic blood pressure (SBP), and heart rate assessed at rest, submaximal intensities (ie, anaerobic threshold [AT] and respiratory compensation point), and maximal intensity (peak exercise). RESULTS: Compared with control subjects, subjects with PD had lower V˙o2, heart rate, and SBP at respiratory compensation point and peak exercise (V˙o2: 14.6±3.6mL⋅kg⋅min vs 17.9±5.5mL⋅kg⋅min and 17.7±4.8mL⋅kg⋅min vs 21.5±6.6mL⋅kg⋅min; heart rate: 119±17beats/min vs 139±12beats/min and 132±20beats/min vs 158±13beats/min; SBP: 151±17mmHg vs 172±20mmHg and 166±21mmHg vs 187±24mmHg; P≤.05). They also had lower heart rate at AT (102±14beats/min vs 110±13beats/min; P≤.05), whereas V˙o2 and SBP at this intensity were similar to those of control subjects. CONCLUSIONS: Subjects with PD demonstrated blunted metabolic and cardiovascular responses to submaximal and maximal exercise tests, especially at intensities above AT, which are in line with autonomic disturbances present in patients with PD. Future studies need to determine how this affects performance, participation, and responses of these patients to exercise training at different intensities.
OBJECTIVE: To investigate submaximal and maximal responses during maximal cardiopulmonary exercise tests in subjects with Parkinson disease (PD). DESIGN: Cross-sectional. SETTING: A PD association. PARTICIPANTS: A sample (N=68) of subjects with PD (n=48; mean age, 66±8y; modified Hoehn and Yahr stage between 2 and 3; "on" state of medication) and age-matched controls without PD (n=20; mean age, 64±9y). INTERVENTIONS: Maximal cardiopulmonary exercise test on a cycle ergometer. MAIN OUTCOME MEASURES: Oxygen uptake (V˙o2), systolic blood pressure (SBP), and heart rate assessed at rest, submaximal intensities (ie, anaerobic threshold [AT] and respiratory compensation point), and maximal intensity (peak exercise). RESULTS: Compared with control subjects, subjects with PD had lower V˙o2, heart rate, and SBP at respiratory compensation point and peak exercise (V˙o2: 14.6±3.6mL⋅kg⋅min vs 17.9±5.5mL⋅kg⋅min and 17.7±4.8mL⋅kg⋅min vs 21.5±6.6mL⋅kg⋅min; heart rate: 119±17beats/min vs 139±12beats/min and 132±20beats/min vs 158±13beats/min; SBP: 151±17mmHg vs 172±20mmHg and 166±21mmHg vs 187±24mmHg; P≤.05). They also had lower heart rate at AT (102±14beats/min vs 110±13beats/min; P≤.05), whereas V˙o2 and SBP at this intensity were similar to those of control subjects. CONCLUSIONS: Subjects with PD demonstrated blunted metabolic and cardiovascular responses to submaximal and maximal exercise tests, especially at intensities above AT, which are in line with autonomic disturbances present in patients with PD. Future studies need to determine how this affects performance, participation, and responses of these patients to exercise training at different intensities.
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