Effects of inspiratory muscle-training intensity on cardiovascular control in amateur cyclists

Autor(es)

de Abreu, Raphael Martins ^[1] ; Porta, Alberto ^{[2, 3]} ; Rehder-Santos, Patricia ^[1] ; Cairo, Beatrice ^[2] ; da Silva, Claudio Donisete ^[1] ; Signini, Etore De Favari ^[1] ; Sakaguchi, Camila Akemi ^[1] ; Catai, Aparecida Maria ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Phys Therapy, Sao Paulo, SP - Brazil

^[2] IRCCS Policlin San Donato, Dept Cardiothorac Vasc Anesthesia & Intens Care, Milan - Italy

^[3] Univ Milan, Dept Biomed Sci Hlth, Milan - Italy

• Tipo de documento: Artigo Científico
• Fonte: AMERICAN JOURNAL OF PHYSIOLOGY-REGULATORY INTEGRATIVE AND COMPARATIVE PHYSIOLOGY; v. 317, n. 6, p. R891-R902, DEC 2019.
• Citações Web of Science: 0

Resumo

Chronic effects of inspiratory muscle training (IMT) on autonomic function and baroreflex regulation are poorly studied. This study aims at evaluating chronic effects of different IMT intensities on cardiovascular control in amateur cyclists. A longitudinal. randomized, controlled blind study was performed on 30 recreational male cyclists undergoing IMT for 11 wk. Participants were randomly allocated into sham-trained group (SHAM, n = 9), trained group at 60% of the maximal inspiratory pressure (MIP60, n = 10), and trained group at critical inspiratory pressure (CIP, n = 11). Electrocardiogram, finger arterial pressure. and respiratory movements were recorded before (PRE) and after (POST) training at rest in supine position (REST) and during active standing (STAND). From the beat-to-beat series of heart period (HP) and systolic arterial pressure (SAP), we computed time domain markers, frequency domain indexes in the low frequency (0.04-0.15 Hz) and high frequency (HF, 0.15-0.4 Hz) bands, an entropy-based complexity index (CI), and baroreflex markers estimated from spontaneous I IP-SAP sequences. Compared with SHAM, the positive effect of MIP60 over the HP series led to the HF power increase during REST (PRE: 521.2 +/- 447.5 ms(2); POST: 1,161 +/- 878.9 ms(2)) and the CI rise during STAND (PRE: 0.82 +/- 0.18; POST: 0.97 +/- 0.13). Conversely, the negative effect of CIP took the form of the decreased HP mean during STAND (PRE: 791 +/- 71 ms; POST: 737 +/- 95 ms). No effect of IMT was visible over SAP and baroreflex markers. These findings suggest that moderate-intensity IMT might be beneficial when the goal is to limit cardiac sympathetic hyperactivity at REST and/or in response to STAND. (AU)

• Processo FAPESP: 17/13402-0 - Comparação de diferentes intensidades de treinamento muscular inspiratório sobre o controle autonômico cardiovascular de ciclistas: estudo clínico controlado e randomizado
• Beneficiário: Raphael Martins de Abreu
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 18/11123-0 - Análise inovadora do controle autonômico cardiovascular em ciclistas após diferentes intensidades de treinamento muscular inspiratório: estudo clínico controlado e aleatorizado
• Beneficiário: Raphael Martins de Abreu
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto
• Processo FAPESP: 16/22215-7 - Impacto do treinamento muscular inspiratório e do envelhecimento no mapeamento metabólico, modulação autonômica e respostas cardiovasculares, respiratórias e metabólicas e predição da saúde cardiorrespiratória por meio de wearables
• Beneficiário: Aparecida Maria Catai
• Modalidade de apoio: Auxílio à Pesquisa - Temático