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Article type: Research Article
Authors: Germano-Soares, Antonio H.a; e | Montenegro, Rafael A.b | Cavalcante, Bruno R.a; e | Domingues, Wagner J.R.c | de Lima, Paulo F.M.a | Menêses, Annelise L.d | Almeida, Tarciso R.M.e | Okano, Alexandre H.f | Ritti-Dias, Raphael M.a; g; *
Affiliations: [a] Associated Graduated Program UPE/UFPB, Pernambuco, Brazil | [b] Physical Activity and Health Promotion Laboratory, Physical Education and Sports Institute, Rio de Janeiro State University, Rio de Janeiro, Brazil | [c] Associated Graduated Program in Physical Education UEM/UEL, Paraná, Brazil | [d] School of Health and Sport Sciences, University of the Sunshine Coast, Queensland, Australia | [e] Department of Physical Education, University of Pernambuco, Pernambuco, Brazil | [f] Research Group of Integrative Biology of Exercise, Physical Education Department, Rio Grande do Norte Federal University, Rio Grande do Norte, Brazil | [g] Albert Einstein Hospital, São Paulo, Brazil
Correspondence: [*] Corresponding author: Raphael Mendes Ritti-Dias, Albert Einstein Hospital. Albert Einstein Avenue, 627, ZIP-code: 05652-900, Sao Paulo, Brazil. Tel.: +5519 99940 6878; E-mail:raphaelritti@gmail.com
Abstract: BACKGROUND: Transcranial direct current stimulation (tDCS) seems to modulate cardiac autonomic function and blood pressure (BP) at rest and during exercise. Therefore, it is possible that anodal tDCS could influence post-exercise hypotension. OBJECTIVE: To investigate whether anodal tDCS applied over the motor cortex would affect cardiac autonomic modulation and BP after resistance exercise. METHODS: Twelve apparently healthy young men performed two experimental sessions: anodal tDCS or sham condition followed by resistance exercise. Blood pressure (BP), heart rate (HR), rate-pressure product (RPP), and HR variability (HRV) were obtained before and during post-exercise recovery (at 20 and 60 minutes). RESULTS: Compared to pre-exercise, systolic BP decreased at 20 and at 60 minutes of post-exercise recovery only in anodal tDCS condition (p = 0.03), with no statistical differences in sham condition (p > 0.05). Diastolic and mean BP reduced after both anodal tDCS and sham conditions with no differences between them (P> 0.05). In comparison with anodal tDCS, there were slower HR recovery (tDCS vs. sham: -2 ± 14 vs. 14 ± 8 bpm) and higher RPP (tDCS vs. sham: -1083 ± 1846 vs. 1672 ± 1275 mmHg × bpm) after exercise following sham condition (P< 0.01). No differences were found in any of the HRV analyzed parameters (P> 0.05). CONCLUSION: A single session of primary motor cortex tDCS is capable of decreasing the systolic BP and HR responses, as well as the cardiac work after a resistance exercise session in young normotensive subjects regardless of any changes in cardiac autonomic modulation.
Keywords: Post-exercise hypotension, tDCS, motor cortex, resistance exercise
DOI: 10.3233/IES-160653
Journal: Isokinetics and Exercise Science, vol. 25, no. 2, pp. 113-120, 2017
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