| Leg muscles activities during hyperventilation following a cycling exercise. | |
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MedLine Citation:
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PMID: 20349557 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The goal of this study was to establish how increased ventilation modifies postural stability, as characterized by body sway and leg muscle activities. Twelve healthy subjects had to perform six 30-second postural tests: one pre-exercise test while breathing gently and then one test every minute for the five minutes immediately following a maximum-intensity, incremental cycling exercise test. Subjects were asked to maintain an upright stance on a force plate for 30 s, with their eyes open. Movement of the centre of pressure in the sagittal plane was monitored in the time and spectral domains. Myoelectric activities of the soleus and tibialis anterior muscles were recorded using surface electromyography. Ventilatory parameters were measured with a portable, telemetric device. Postural changes related to respiratory variations were quantified by coherence analysis. The results showed that hyperventilation induced by exercise was accompanied by a significant increase in postural parameters, indicating a reduction in postural stability following a change in ventilatory drive. Coherence analysis confirmed the ventilatory origin of the postural oscillations. The results suggest that ventilation may be an important factor in postural disturbance during physical activity. The observed increases in leg muscle activities were most likely related to musculo-articular stiffening. |
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Authors:
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P David; I Mora; J Terrien; T Lelard; M Petitjean |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Electromyography and clinical neurophysiology Volume: 50 ISSN: 0301-150X ISO Abbreviation: Electromyogr Clin Neurophysiol Publication Date: 2010 Jan-Feb |
Date Detail:
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Created Date: 2010-03-30 Completed Date: 2010-04-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0327533 Medline TA: Electromyogr Clin Neurophysiol Country: Belgium |
Other Details:
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Languages: eng Pagination: 39-45 Citation Subset: IM |
Affiliation:
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Universit? de Picardie Jules Verne, Facult? des Sciences du Sport, All?e Paschal Grousset, 80025 Amiens, Cedex 1, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Exercise Test Female Humans Hyperventilation / physiopathology* Leg / physiopathology* Male Muscle Contraction* Muscle, Skeletal / physiopathology* Physical Endurance* Postural Balance* Posture* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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