2014 Fiscal Year Final Research Report
Testing a teleological hypothesis of cardiolocomotor phase synchronization during exercise
| Project/Area Number |
24370100
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Applied anthropology
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
SAITOH Tadashi 山形大学, 大学院理工学研究科, 助教 (20454770)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 心拍リズム / 運動リズム / 位相同期 / 筋組織ヘモグロビン濃度 |
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| Outline of Final Research Achievements |
The present study aimed to test a teleological hypothesis of phase synchronization between cardiac and locomotor rhythm observed during rhythmic exercise. Twenty five subjects performed incremental grade walking test on a treadmill at a constant speed for 20 min. Breath-by-breath gas exchange parameters and changes in oxy- and deoxy-hemoglobin at the soleus muscle by NIRS were measured. The changes in gas exchange parameters and NIRS indices during cardiac-locomotor synchronization (CLS) were evaluated as the differences between the observed and predicted values, which were obtained by plotting each desynchronized parameter against time and fitted with a least square regression line. Lower level of ventilatory equivalent for O2 and relative increase in deoxyhemoglobin and decrease in oxyhemoglobin were observed during CLS episode. These results suggest that CLS improves the pulmonary gas exchange efficiency and induces a shift toward more aerobic oxidative metabolism in the muscle.
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| Free Research Field |
生体生理工学
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