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Comparison of different intensities of inspiratory muscle training on the cardiovascular autonomic control of cyclists: controlled and randomized clinical study

Grant number: 17/13402-0
Support Opportunities:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): January 01, 2018
Effective date (End): August 31, 2020
Field of knowledge:Health Sciences - Physiotherapy and Occupational Therapy
Principal Investigator:Aparecida Maria Catai
Grantee:Raphael Martins de Abreu
Host Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated scholarship(s):18/11123-0 - Innovative analysis of cardiovascular autonomic control in cyclists after different intensities of inspiratory muscle training: controlled and randomized clinical study, BE.EP.DD

Abstract

The inspiratory muscle training (IMT) has been studied as a not conventional method to improve the performance of athletes, due your contribution to reduction of dyspnea and peripheral muscle fatigue, which are the main limiting of sports. However, little is known about the effects of IMT on cardiovascular autonomic control, as well as, on the baroreflex sensitivity (BRS), which are determinants factors to maintain of cardiovascular homeostasis and responsible for heart rate and arterial pressure control, both at rest and during sports activity. Autonomic control can be evaluated indirectly through the analysis of heart rate and blood pressure variability (HRV and VPA, respectively), which are influenced by SBR. Some studies have identified the influence of IMT on cardiac autonomic control in the reduction of resting sympathetic modulation, represented in the HRV spectral analysis, however, the physiological mechanisms of the IMT operates are still inconclusive in the literature. In addition, it is not known to recognize a VPA and SBR in humans, and they allow it to elucidate and bring additional information about responses to autonomic vascular adaptations after training. Objective: To evaluate the effects of different intensities of IMT on cardiovascular autonomic control in recreational cyclists. Materials and Methods: Thirty recreational cyclists male, aged 20 to 40 years, they will be randomly divided in three training groups: Sham Group (SG), Critical Power Group (PTHCG) and 60% of MIP Group (60G). After screening and clinical evaluation, the individuals will be submitted to 11 weeks of IMT, with a weekly frequency of 3 sessions and duration of 1 hour each session, with the calculation of the exercise load, in according to the allocated group. The HRV, APV, BRS, as well as, the test of strength and resistance muscular respiratory and cardiopulmonary test, will be obtained in pre and post intervention times. There will be a descriptive analysis of the three groups, the normality of the data will be evaluated by the Shapiro-Wilk test and homogeneity by the Levene test. For comparison between groups of training, will be used parametric and non-parametric tests, according to the data distribution. The significance level will be fixed in p<0,05. Expected Results: It is expected that at the end of 11 weeks of TMI, when compared the groups (PTHCG, SG and 60G), present distinct cardiovascular autonomic responses, allowing elucidating which better training load that benefits this system. In addition, the results will allow later investigation of this protocol in patients whose clinical characteristics are autonomic dysfunction and/or dysautonomia. (AU)

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Scientific publications (7)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE ABREU, RAPHAEL MARTINS; CATAI, APARECIDA MARIA; CAIRO, BEATRICE; REHDER-SANTOS, PATRICIA; DA SILVA, CLAUDIO DONISETE; SIGNINI, ETORE DE FAVARI; SAKAGUCHI, CAMILA AKEMI; PORTA, ALBERTO. A Transfer Entropy Approach for the Assessment of the Impact of Inspiratory Muscle Training on the Cardiorespiratory Coupling of Amateur Cyclists. FRONTIERS IN PHYSIOLOGY, v. 11, . (17/13402-0, 18/11123-0, 16/22215-7)
DE ABREU, RAPHAEL MARTINS; REHDER-SANTOS, PATRICIA; SIMOES, RODRIGO POLAQUINI; CATAI, APARECIDA MARIA. Can high-intensity interval training change cardiac autonomic control? A systematic review. BRAZILIAN JOURNAL OF PHYSICAL THERAPY, v. 23, n. 4, p. 279-289, . (17/13402-0)
ABREU, RAPHAEL M.; PORTA, ALBERTO; REHDER-SANTOS, PATRICIA; SAKAGUCHI, CAMILA A.; SILVA, CLAUDIO D.; SIGNINI, ETORE F.; MILAN-MATTOS, JULIANA; CAIRO, BEATRICE; DE MARIA, BEATRICE; VAINI, EMANUELE; et al. Cardiovascular Coupling during Postural Challenge in Athletes and Non-Athletes. 2020 11TH CONFERENCE OF THE EUROPEAN STUDY GROUP ON CARDIOVASCULAR OSCILLATIONS (ESGCO): COMPUTATION AND MODELLING IN PHYSIOLOGY NEW CHALLENGES AND OPPORTUNITIES, v. N/A, p. 2-pg., . (18/11123-0, 17/13402-0)
CAIRO, BEATRICE; DE ABREU, RAPHAEL MARTINS; BARI, VLASTA; GELPI, FRANCESCA; DE MARIA, BEATRICE; REHDER-SANTOS, PATRICIA; SAKAGUCHI, CAMILA AKEMI; DA SILVA, CLAUDIO DONISETE; SIGNINI, ETORE DE FAVARI; CATAI, APARECIDA MARIA; et al. Optimizing phase variability threshold for automated synchrogram analysis of cardiorespiratory interactions in amateur cyclists. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND, v. 379, n. 2212, . (16/22215-7, 17/13402-0, 18/11123-0)
DE ABREU, RAPHAEL MARTINS; PORTA, ALBERTO; REHDER-SANTOS, PATRICIA; CAIRO, BEATRICE; SAKAGUCHI, CAMILA AKEMI; DA SILVA, CLAUDIO DONISETE; SIGNINI, ETORE DE FAVARI; MILAN-MATTOS, JULIANA CRISTINA; CATAI, APARECIDA MARIA. Cardiorespiratory coupling strength in athletes and non-athletes. Respiratory Physiology & Neurobiology, v. 305, p. 8-pg., . (16/22215-7, 18/11123-0, 20/15769-1, 17/13402-0)
DE ABREU, RAPHAEL MARTINS; PORTA, ALBERTO; REHDER-SANTOS, PATRICIA; CAIRO, BEATRICE; DA SILVA, CLAUDIO DONISETE; SIGNINI, ETORE DE FAVARI; SAKAGUCHI, CAMILA AKEMI; CATAI, APARECIDA MARIA. Effects of inspiratory muscle-training intensity on cardiovascular control in amateur cyclists. AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY, v. 317, n. 6, p. R891-R902, . (17/13402-0, 18/11123-0, 16/22215-7)
ABREU, RAPHAEL M.; CATAI, APARECIDA M.; CAIRO, BEATRICE; REHDER-SANTOS, PATRICIA; DE MARIA, BEATRICE; VAINI, EMANUELE; BARI, VLASTA; PORTA, ALBERTO; IEEE. Assessment of the Coupling Strength of Cardiovascular Control via Joint Symbolic Analysis during Postural Challenge in Recreational Athletes. 2019 41ST ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY (EMBC), v. N/A, p. 4-pg., . (18/11123-0, 17/13402-0)

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