2001 Fiscal Year Final Research Report Summary
Investigation on Relationship Between Physical Activity and Human Sleep-Awake Cycle by Temporal Isolation
| Project/Area Number |
10480005
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
体育学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
YAMAMOTO Yoshiharu The university of Tokyo, Graduate school of Education, Professor, 大学院・教育学研究科, 教授 (60251427)
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| Co-Investigator(Kenkyū-buntansha) |
INOUE Hiroshi Toyama Medical and Phermaceutical University, Faculty of Medicine, Professor, 医学部, 教授 (60151619)
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| Project Period (FY) |
1998 – 2000
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| Keywords | Heart rate variability / Physical activity / Core temperature / Circadian rhythm / Aerobic exercise / Phase shift |
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| Research Abstract |
We investigated the relationship between physical activity and sleep-awake cycles in humans. First, we developed a portable data logger to continuously monitor heart rate and body movement and a method to unmask the heart rate circadian rhythm free from components related to physical activity. Both the results of constant routine and temporal isolation experiments revealed that the unmasked heart rate circadian rhythm was in good agreement with the core temperature circadian rhythm. Next, the effects of diurnal low intensity physical activity (3 hr) on core temperature and heart rate circadian rhythms were examined during temporal isolation. It was found that the diurnal physical activity shifted the circadian rhythms behind those of previous days. Finally, we investigated the effects of diurnal exercise on the circadian locomotor activity in patients with chronic fatigue syndrome. It was shown that circadian rest-activity periods of the patients were increased following exercise, indicating that exhaustive exercise interferes with normal entrainment to 24 h zeitgeber(s). This effect may explain, in part, the common patient complaint of symptom worsening following exertion.
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