Cardiovascular responses to low-intensity isometric handgrip exercise in coronary artery disease: effects of posture |
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| Affiliation: | 1. Department of Physical Therapy, Universidade Federal de São Carlos (UFSCar), São Carlos, SP, Brazil;2. Department of Biomedical Sciences for Health, University of Milan, Milan, Italy;3. Department of Cardiothoracic, Vascular Anesthesia and Intensive Care, IRCSS Policlinico San Donato, San Donato Milanese, Milan, Italy;4. Adventist University Center of São Paulo, Engenheiro Coelho, SP, Brazil;5. Department of Physical Therapy, School of Science and Technology, Universidade Estadual Paulista (UNESP), Presidente Prudente, SP, Brazil;1. Physical Therapy Department, Faculdade Ciências Médicas de Minas Gerais, Belo Horizonte, MG, Brazil;2. Graduate Program in Rehabilitation Sciences, School of Physical Education, Physical Therapy and Occupational Therapy, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil;1. Department of Physical Therapy, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil;2. Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil;1. Department of Physiotherapy, School of Allied Health Sciences, Manipal Academy of Higher Education, Manipal, India;2. Department of Behavior Sciences, College of Medicine, Dar Al Uloom University, Riyadh, Saudi Arabia;3. Centre for Comprehensive Stroke Rehabilitation and Research, Manipal Acdemy of Higher Education, Manipal, India;1. Department of Physical Therapy, Universidade Federal de Ciências da Sáude de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil;2. Department of Basic Health Sciences, Universidade Federal de Ciências da Sáude de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil;1. NeuroGroup, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil;2. Center of Health Sciences, Universidade Federal do Espírito Santo (UFES), Vitória, ES, Brazil;3. Discipline of Ocupational Therapy, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil |
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| Abstract: | BackgroundCoronary artery disease (CAD) lead to cardiovascular autonomic control disfunctions that can worsen exercise and/or posture adjustments.ObjectivesTo verify the cardiovascular responses to low-intensity isometric handgrip exercise performed in different postures in CAD patients. This study tested the hypothesis that the posture influences the cardiovascular responses during isometric handgrip exercise and that the presence of CAD leads to greater cardiovascular stress during this type of exercise.MethodsWe investigated cardiovascular responses to isometric handgrip exercise in 15 CAD patients (CADG) and 15 health matched-control (CG). The subjects performed isometric handgrip exercise at 30% of maximum voluntary contraction until exhaustion in SUPINE, SITTING and STANDING positions. Systolic arterial pressure, diastolic arterial pressure, mean blood pressure, heart rate, peripheral vascular resistance, cardiac output, stroke volume and double product were measured during rest (baseline), exercise (peak value) and recovery in the 1st minute (REC1). Delta PB (ΔPB, peak minus baseline) and PR1 (ΔPR1, peak minus REC1) were calculated.ResultsHigher ΔPB and ΔPR1 of systolic and mean arterial pressure and double product were observed in STANDING when compared to SITTING and/or SUPINE. CADG showed higher ΔPB of systolic and mean arterial pressure in all postures and higher ΔPR1 of strove volume in the SITTING.ConclusionWe concluded that the posture during isometric handgrip exercise influences the cardiovascular responses with STANDING leading to higher cardiovascular stress. CAD promoted higher arterial pressure responses however these responses were physiological and expected due to the presence of disease and type of exercise. |
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| Keywords: | Cardiovascular system Isometric contraction Blood pressure Heart rate Physical therapy Postures |
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