Assessment of reproducibility and validity of shuttle walk test for the determination exercise induced bronchoconstriction

• Grant number: 11/23771-7
• Support Opportunities: Regular Research Grants
• Start date: November 01, 2012
• End date: April 30, 2015
• Field of knowledge: Health Sciences - Physiotherapy and Occupational Therapy
• Principal Investigator: Valéria Amorim Pires Di Lorenzo
• Grantee: Valéria Amorim Pires Di Lorenzo
• Host Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated researchers: Adriana Sanches Garcia de Araújo ; Audrey Borghi Silva ; Ivana Gonçalves Labadessa ; Marcos Miranda de Araujo ; Soraia Pilon Jürgensen

Abstract

The exercise induced bronchoconstriction (EIB) is a major risk factor for sudden death in people with asthma. It is responsible for the majority of asthma attacks in children with high prevalence in individuals with asthma. In 10% of EIB cases affect individuals without asthma diagnosis. Thus the EIB presence assessment is necessary but maximal exercise test on treadmill and cycle ergometer are costly and require trained staff. So the shuttle walk test (SWT) could be done to assess EIB presence as it is unknown its reproducibility and validity in EIB and cardiorespiratory response assessment with this population. Objectives: testing the SWT reproducibility and validity for the EIB assessment. Assessing and comparing cardiorespiratory variables, the curve flow-volume behavior and dyspnea and fatigue subjective perception of the lower limbs in individuals with and without asthma. Comparing these variables between the SWT and maximal test in treadmill. Methods: Individuals with and without asthma will be assessed by clinical evaluation, pulmonary function, cardiopulmonary exercise test and three SWT performed on different days. During the tests it will be continuously measured ergoespirometric variables, heart rate and RR intervals. In the begging and the end of each test it will be measured blood pressure, respiratory rate and sense of dyspnea and effort by borg scale (0-10). Expected results: It is expected that the SWT could be reproducibility and validity for the EIB assessment in asthmatic population and that the cardiorespiratory responses could be comparable to the incremental treadmill test. (AU)