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    Developmental Changes in Hemodynamic Responses and Cardiovagal Modulation during Isometric Handgrip Exercise

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    Authors
    Goulopoulou, Styliani
    Fernhall, Bo
    Kanaley, Jill A.
    Issue Date
    2010-08-29
    URI
    http://hdl.handle.net/10675.2/594
    
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    Abstract
    The purpose of this study was to examine differences in pressor response and cardiovagal modulation during isometric handgrip exercise (IHG) between children and adults. Beat-to-beat heart rate (HR) and blood pressure were measured in 23 prepubertal children and 23 adults at baseline and during IHG. Cardiovagal modulation was quantified by analysis of HR variability. Mean arterial pressure responses to IHG were greater in adults compared to children (P < .05) whereas there were no group differences in HR responses (P > .05). Children had a greater reduction in cardiovagal modulation in response to IHG compared to adults (P < .05). Changes in mean arterial pressure during IHG were correlated with baseline cardiovagal modulation and force produced during isometric contraction (P < .05). In conclusion, differences in pressor reflex response between children and adults cannot be solely explained by differences in autonomic modulation and appear to be associated with factors contributing to the force produced during isometric contraction.
    Citation
    Int J Pediatr. 2010 Aug 29; 2010:153780
    ae974a485f413a2113503eed53cd6c53
    10.1155/2010/153780
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    Department of Physiology: Faculty Research and Presentations

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