Pupil-linked Arousal with Very Light Exercise: Pattern of Pupil Dilation During Graded Exercise

Overview

Journal J Physiol Sci

Specialty Physiology

Date 2022 Sep 24

PMID 36153491

Authors

Ryuta Kuwamizu

Yudai Yamazaki

Naoki Aoike

Genta Ochi

Kazuya Suwabe

Hideaki Soya

Affiliations

Soon will be listed here.

Abstract

Although it has been hypothesized that moderate to vigorous exercise immediately modulates cognition via ascending arousal system activation, such activation during very-light to light exercise has remained uncertain. Here, we aimed to uncover the exact exercise intensity necessary for ascending arousal system activation using pupillometry. The pupil diameter, psychological arousal, and ventilation during graded exercise of 26 young males were analyzed based on %[Formula: see text]. Pupils dilated with very-light exercise compared to rest, stabilized, and then drastically increased again with moderate exercise and above. Pupil dilation with very-light exercise was positively correlated with increases in psychological arousal. Thus, we have shown that there are two phases of pupil dilation during graded exercise: one with very-light exercise coinciding with psychological arousal response, and the other with moderate exercise or above similar to the ventilation increase pattern. This unique pupil dilation pattern provides physiological evidence of ascending arousal system activation with very-light exercise.

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