| Different blood flow responses to dynamic exercise between internal carotid and vertebral arteries in women. | |
| | |
MedLine Citation:
|
PMID: 20595539 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The blood flow regulation in vertebral system during dynamic exercise in humans remains unclear. We examined the blood flow responses in both the internal carotid artery (QICA) and vertebral artery (QVA) simultaneously during graded dynamic exercise by Doppler ultrasound to evaluate whether cerebrovascular responses to exercise were similar. In the semisupine position, 10 young women performed a graded cycling exercise at three loads of 30, 50, and 70% of peak oxygen uptake (VO2peak) for 5 min for each workload. Mean arterial pressure, heart rate, and cardiac output increased progressively with three workloads (P<0.01). The end-tidal partial pressure of CO2 (PetCO2) in the expired gas increased from the resting level (P<0.01) at 30 and 50% VO2peak. The PetCO2 at 70% VO2peak (43.2±1.6 Torr) was significantly lower than that at 50% VO2peak (45.3±1.4 Torr). In parallel with the changes in PetCO2, QICA increased from resting level by 11.6±1.5 and 18.4±2.7% at 30 and 50% VO2peak (P<0.01), respectively, and leveled off at 70% VO2peak. In contrast, QVA did not show a leveling off and increased proportionally with workload: 16.8±3.1, 32.8±3.6, and 39.5±3.4% elevations at the three exercise loads, respectively (P<0.01). With increasing exercise load, the cerebrovascular resistance in internal carotid artery increased (P<0.01), while cerebrovascular resistance in vertebral artery remained stable during exercise. The different responses between QICA and QVA in the present study indicate a heterogenous blood flow and cerebrovascular control in the internal carotid and vertebral systems during dynamic exercise in humans. |
| | |
Authors:
|
Kohei Sato; Tomoko Sadamoto |
Related Documents
:
|
17699359 - Cardiorespiratory fitness is related to physical inactivity, metabolic risk factors, an... 10926659 - Pulmonary gas exchange during exercise in women: effects of exercise type and work incr... 14504949 - Changes in mechanical work during severe exhausting running. 11782659 - Children's omni scale of perceived exertion: walking/running evaluation. 12032409 - Kinetics of co(2) excessive expiration in constant-load exercise. 12111279 - A metabolic cart for measurement of oxygen uptake during human exercise using inspirato... 8929619 - Breath isoprene: temporal changes in respiratory output after exposure to ozone. 16611389 - Ascorbic acid supplementation does not attenuate post-exercise muscle soreness followin... 16770469 - Arterioles' contribution to oxygen supply to the skeletal muscles at rest. |
Publication Detail:
|
Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2010-07-01 |
Journal Detail:
|
Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 109 ISSN: 1522-1601 ISO Abbreviation: J. Appl. Physiol. Publication Date: 2010 Sep |
Date Detail:
|
Created Date: 2010-09-10 Completed Date: 2011-01-12 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: United States |
Other Details:
|
Languages: eng Pagination: 864-9 Citation Subset: IM |
Affiliation:
|
Research Institute of Physical Fitness, Japan Women's College of Physical Education, Kita-Karasuyama, Setagaya-ku, Tokyo, 157-8565, Japan. ksato@jwcpe.ac.jp |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Blood Pressure Cardiac Output Carotid Artery, Internal / physiology*, ultrasonography Cerebrovascular Circulation* Exercise* Female Heart Rate Humans Muscle Contraction* Oxygen Consumption Regional Blood Flow Time Factors Ultrasonography, Doppler, Color Vascular Resistance Vertebral Artery / physiology*, ultrasonography Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Aerobic exercise training improves skeletal muscle function and Ca2+ handling-related protein expres...
Next Document: Comparison between maximal lengthening and shortening contractions for biceps brachii muscle oxygena...