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Kojima S, Morishita S, Hotta K, Qin W, Usui N, Tsubaki A. Temporal changes in cortical oxygenation in the motor-related areas and bilateral prefrontal cortex based on exercise intensity and respiratory metabolism during incremental exercise in male subjects: A near-Infrared spectroscopy study. Front Physiol 2022; 13:794473. [PMID: 36017334 PMCID: PMC9396126 DOI: 10.3389/fphys.2022.794473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 07/07/2022] [Indexed: 11/13/2022] Open
Abstract
A recent study has reported that prefrontal cortex (PFC) activity during incremental exercise may be related to exercise termination on exhaustion. However, few studies have focused on motor-related areas during incremental exercise. This study investigated changes in the oxygenation of the PFC and motor-related areas using near-infrared spectroscopy during incremental exercise. Moreover, we analyzed the effect of exercise termination on changes in cortical oxygenation based on exercise intensity and respiratory metabolism. Sixteen healthy young male patients participated in this study. After a 4-min rest and 4-min warm-up period, incremental exercise was started at an incremental load corresponding to 20 W/min. Oxyhemoglobin (O2Hb), deoxyhemoglobin (HHb), and total hemoglobin (THb) in the bilateral PFC, supplementary motor area, and primary motor cortex were measured. We evaluated changes in oxygenation in each cortex before and after the anaerobic threshold (AT) and respiratory compensation point to identify changes due to respiratory metabolism. O2Hb and THb increased from moderate intensity or after AT to maximal exercise, and HHb increased slowly compared to O2Hb and THb; these changes in hemoglobin levels were consistent in all cortical areas we measured. However, the increase in each hemoglobin level in the bilateral PFC during incremental exercise was faster than that in motor-related areas. Moreover, changes in cortical oxygenation in the right PFC were faster than those in the left PFC. These results suggest changes based on differences in neural activity due to the cortical area.
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Affiliation(s)
- Sho Kojima
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
- Department of Physical Therapy, Kisen Hospital, Tokyo, Japan
| | | | - Kazuki Hotta
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Weixiang Qin
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - Naoto Usui
- Department of Physical Therapy, Kisen Hospital, Tokyo, Japan
| | - Atsuhiro Tsubaki
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
- *Correspondence: Atsuhiro Tsubaki,
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Hsiao YW, Tzeng HY, Chu CM, Lan HY, Chiang HH. A Novel Intensity-Based Approach to Increasing Prefrontal Cerebral Oxygenation by Walking Exercise. J Pers Med 2022; 12:jpm12040510. [PMID: 35455626 PMCID: PMC9027192 DOI: 10.3390/jpm12040510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/17/2022] [Accepted: 03/17/2022] [Indexed: 11/24/2022] Open
Abstract
Regional cerebral blood flow (rCBF) increases after moderately intense exercise and is significantly correlated with cognitive function. However, no intensity-based physiological indicator for enhancing rCBF during low- to-moderate-intensity exercise has been proposed. The purpose of this study was to develop a physiological indicator housed in a wearable device to determine whether low-to-moderate intensity walking can increase rCBF. A cross-sectional study with four parallel arms was performed. Each of 114 participants was randomly assigned to either the moderate, low-to-moderate, low, or very low walking intensity groups. A novel dynamic cardiac force meter (CFM) was used to quantify walking intensity. Heart rate and hemoencephalography (HEG) were measured during each phase of the session. Compared to baseline, HEG significantly increased in both the submaximal exercise and recovery phases in members of the low-to-moderate intensity group but not the very low intensity group. Low-to-moderate intensity walking improves prefrontal cerebral blood oxygenation. The present results demonstrate the usefulness of a dynamic CFM housed in a wearable device for quantifying the intensity of walking exercise aimed at increasing prefrontal blood oxygenation. The results of the study may help guide further development of exercise strategies for brain disease patients and the ageing population.
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Affiliation(s)
- Ya-Wen Hsiao
- School of Nursing, National Defense Medical Center, No 161, Sec. 6, Minquan E. Road, Neihu Dist., Taipei 11490, Taiwan; (Y.-W.H.); (H.-Y.T.); (H.-Y.L.)
- Department of Nursing, Tri-Service General Hospital, No 325, Sec. 2, Chenggong Rd., Neihu Dist., Taipei 10490, Taiwan
| | - Hsin-Ya Tzeng
- School of Nursing, National Defense Medical Center, No 161, Sec. 6, Minquan E. Road, Neihu Dist., Taipei 11490, Taiwan; (Y.-W.H.); (H.-Y.T.); (H.-Y.L.)
- Department of Nursing, Tri-Service General Hospital, No 325, Sec. 2, Chenggong Rd., Neihu Dist., Taipei 10490, Taiwan
| | - Chi-Ming Chu
- Division of Biostatistics and Medical Informatics, Department of Epidemiology, School of Public Health, National Defense Medical Center, Taipei 114201, Taiwan;
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114201, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei 114201, Taiwan
- Big Data Research Center, Fu-Jen Catholic University, New Taipei City 242062, Taiwan
- Department of Public Health, School of Public Health, China Medical University, Taichung 404328, Taiwan
- Department of Public Health, Kaohsiung Medical University, Kaohsiung 807378, Taiwan
| | - Hsiang-Yun Lan
- School of Nursing, National Defense Medical Center, No 161, Sec. 6, Minquan E. Road, Neihu Dist., Taipei 11490, Taiwan; (Y.-W.H.); (H.-Y.T.); (H.-Y.L.)
| | - Hui-Hsun Chiang
- School of Nursing, National Defense Medical Center, No 161, Sec. 6, Minquan E. Road, Neihu Dist., Taipei 11490, Taiwan; (Y.-W.H.); (H.-Y.T.); (H.-Y.L.)
- Correspondence: ; Tel.: +886-2-87923100 (ext. 18761)
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