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. 2021 Nov;41(6):480-487.
doi: 10.1111/cpf.12723. Epub 2021 Aug 21.

Effects of isometric handgrip exercise with or without blood flow restriction on interference control and feelings

Yujiro Yamada  1 , Jun Seob Song  1 , Zachary W Bell  1 , Vickie Wong  1 , Robert W Spitz  1 , Takashi Abe  2 , Jeremy P Loenneke  1
Affiliations

Effects of isometric handgrip exercise with or without blood flow restriction on interference control and feelings

Yujiro Yamada et al. Clin Physiol Funct Imaging. 2021 Nov.

Abstract

The purpose of this study was to investigate whether isometric handgrip exercise, with or without blood flow restriction, would alter interference control and feelings. 60 healthy young adults completed three experimental visits, consisting of four sets of 2 min isometric handgrip exercise, at 30% of maximal strength with or without blood flow restriction (50% of arterial occlusion pressure), or a non-exercise/time-matched control. Exercise-induced feeling inventory and Stroop Color Word Test were performed at pre- and ~10-min post-exercise, respectively. Bayes factors (BF10 ) quantified the evidence for or against the null. There were no changes or differences between conditions for interference control following exercise with or without blood flow restriction (Incongruent BF10 : 0.155; Stroop Interference BF10 : 0.082). There were also no differences in the error rate as well as no differences between conditions for changes in 'positivity' or 'revitalization'. Feelings of 'tranquility' were reduced relative to a control following exercise with (median δ [95% credible interval]: -0.74 (-1.05, -0.45), BF10 : 5515.7) and without (median δ: -0.72 [-1.02, -0.41], BF10 : 571.3) blood flow restriction. These changes were not different between exercise conditions. Feelings of 'physical exhaustion' were increased relative to a control following exercise without blood flow restriction (median δ: 0.35[0.09, 0.61], BF10 : 5.84). However, this increase was not different from the same exercise with blood flow restriction. These results suggest that 1) isometric handgrip exercise could be performed without impairing interference control, even when blood flow restriction is added, and that 2) changes in feelings occur independent of changes in interference control.

Keywords: Stroop Color Word Test; executive function; exercise-induced feeling inventory; isometric resistance exercise.

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