Author:
Ochi Genta,Kuwamizu Ryuta,Suwabe Kazuya,Fukuie Takemune,Hyodo Kazuki,Soya Hideaki
Abstract
AbstractWe previously found that a 10-min bout of moderate-intensity exercise (50% maximal oxygen uptake) under normobaric and hypoxic conditions (fraction of inspired oxygen [$${{\text{F}}_\text{IO}}_{_{2}}$$
F
IO
2
] = 0.135) reduced executive performance and neural activity in the left dorsolateral prefrontal cortex (DLPFC). To examine whether this cognitive fatigue is due to a decrease in SpO2 during exercise, we compared executive performance and related prefrontal activation between two experimental conditions, in which the participants inhaled normobaric hypoxic gas ($${{\text{F}}_\text{IO}}_{_{2}}$$
F
IO
2
= 0.135) (hypoxic exercise [HE]) or hypoxic gas adjusted so that SpO2 during exercise remained at the resting level (milder hypoxic exercise [ME]). ME condition showed that reaction time in executive performance decreased (t[13] = 2.228, P < 0.05, d = 0.34, paired t-test) and left DLPFC activity increased (t[13] = -2.376, P < 0.05, d = 0.63, paired t-test) after exercise compared with HE condition. These results showed that the HE-induced reductions in the left DLPFC activity and executive performance were both suppressed in the ME condition, supporting the hypothesis that exercise-induced cognitive fatigue under hypoxic environment is due to hypoxemia during exercise. This may lead to the development of a method of coping with cognitive fatigue due to exercise that causes hypoxemia.
Funder
Japan Society for the Promotion of Science
Japan Science and Technology Agency
Publisher
Springer Science and Business Media LLC
Cited by
8 articles.
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