tDCS & aerobic exercise on pain thresholds

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The effects of transcranial direct current stimulation combined with aerobic exercise on pain thresholds and electroencephalography in healthy adults.

OBJECTIVES: We examined whether transcranial direct current stimulation (tDCS) combined with aerobic exercise (AE) modulated the pressure pain threshold (PPT) and peak alpha frequency (PAF) measured via resting electroencephalography.
DESIGN: Single-blind experimental study with a cross-over design.
SETTING: Neuro Rehabilitation Research Center, Kio University.
SUBJECTS: Ten healthy controls participated in this study.
METHODS: Three types of sessions, (i) tDCS, (ii) Sham tDCS/AE, and (iii) tDCS/AE, were tested in this investigation. Anodal stimulation (2 mA, 20 min) was applied over the left primary motor cortex. Each session was 20 min long. We used the PPT and short-form Profile of Mood States-Brief, as well as PAF measured via restingelectroencephalography, to investigate the effects of tDCS and AE. Heart rate and scores on the Borg scale were used to confirm exercise intensity. PAF was calculated in four regions of interest: frontal, central, parietal, and occipital areas.
RESULTS: The change ratio of PPT increased during each session. The maximum change ratio of PPT were tDCS: 40.7%, Sham tDCS/AE: 51.5%, and tDCS/AE: 83.4%. change ratio of PPT was earlier and higher in the tDCS/AE trials compared with the other sessions. Negative mood was improved after session completion. Significant differences in PAF were found in the occipital area in the Sham tDCS/AE and tDCS/AE sessions.
CONCLUSIONS: The combined tDCS and AE intervention induced significant changes in PPT in a single session, with a PAF that was earlier and higher than those produced during the Sham tDCS/AE and tDCS sessions.

PMID: 33543283 [PubMed – as supplied by publisher]

Pain Med. 2021 Feb 05;:

Authors: Sato G, Osumi M, Nobusako S, Morioka S