title: Effect of Locomotor Respiratory Coupling Induced by Cortical Oxygenated Hemoglobin Levels During Cycle Ergometer Exercise of Light Intensity.
abstract: This study aimed to clarify the effects of locomotor-respiratory coupling (LRC) induced by light load cycle ergometer exercise on oxygenated hemoglobin (O2Hb) in the dorsolateral prefrontal cortex (DLPFC), supplementary motor area (SMA), and sensorimotor cortex (SMC). The participants were 15 young healthy adults (9 men and 6 women, mean age: 23.1 ± 1.8 (SEM) years). We conducted a task in both LRC-inducing and LRC-non-inducing conditions for all participants. O2Hb was measured using near-infrared spectroscopy. The LRC frequency ratio during induction was 2:1; pedaling rate, 50 rpm; and intensity of load, 30 % peak volume of oxygen uptake. The test protocol included a 3-min rest prior to exercise, steady loading motion for 10 min, and 10-min rest post exercise (a total of 23 min). In the measurement of O2Hb, we focused on the DLPFC, SMA, and SMC. The LRC frequency was significantly higher in the LRC-inducing condition (p < 0.05). O2Hb during exercise was significantly lower in the DLPFC and SMA, under the LRC-inducing condition (p < 0.05). The study revealed that even light load could induce LRC and that O2Hb in the DLPFC and SMA decreases during exercise via LRC induction.
authors.affiliation: Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminamimachi, Chuo-ku, Kobe City, Hyogo, 650-0047, Japan. k_oyanagi_0731@yahoo.co.jp.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Oyanagi
authors.affiliation: Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan.
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Tsubaki
authors.affiliation: Medical Research Institute, Kitano Hospital, Tazuke Kofukai Foundation, 2-4-20 Ohgimachi, Kita-ku, Osaka, Japan.
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Yasufuku
authors.affiliation: Marukawa Hospital, 962 Asahimachidoge, Shimoniikawa-gun, Toyama, Japan.
authors.forename: Haruna
authors.initials: H
authors.lastname: Takai
authors.affiliation: Tokyo Metropolitan Institute of Gerontology, 35-2 Sakae-cho, Itabashi-ku, Tokyo, 173-0015, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kera
authors.affiliation: Hyogo University of Health Sciences, 1-3-6 Minatojima, Chuo-ku, Kobe, 650-8530, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Tamaki
authors.affiliation: Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminamimachi, Chuo-ku, Kobe City, Hyogo, 650-0047, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Iwata
authors.affiliation: Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, 1398 Shimami-cho, Kita-ku, Niigata, 950-3198, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Onishi
mesh_terms: D000328:Adult; D001642:Bicycling; D015415:Biomarkers / Q000097:blood; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008124:Locomotion; D008297:Male; D009044:Motor Cortex / Q000378:metabolism; D010092:Oximetry / Q000379:methods; D010100:Oxygen / Q000097:blood*; D010101:Oxygen Consumption; D010108:Oxyhemoglobins / Q000378:metabolism*; D017397:Prefrontal Cortex / Q000378:metabolism*; D012119:Respiration; D066191:Sensorimotor Cortex / Q000378:metabolism*; D019265:Spectroscopy, Near-Infrared; D013997:Time Factors; D055815:Young Adult
chemical_list: D015415:Biomarkers; D010108:Oxyhemoglobins; D010100:Oxygen
keywords: 30 % VO2peak; DLPFC; LRC; O2Hb; SMA