Effects of Isometric Handgrip Protocol on Blood Pressure and Neurocardiac Modulation

Abstract Isometric handgrip (IHG) remains a well-studied cardiovascular and autonomic stimulus, however the effects of rhythmic IHG protocols remain largely unknown. The purpose of this study was to investigate the acute effects of 4 IHG protocols on blood pressure (BP) and neurocardiac reactivity a...

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Bibliographic Details
Published in:International journal of sports medicine 2011-03, Vol.32 (3), p.174-180
Main Authors: Millar, P. J., MacDonald, M. J., McCartney, N.
Format: Article
Language:English
Subjects:
Age Factors
Aged
Aging
Analysis of Variance
Autonomic Nervous System - physiology
Biological and medical sciences
Blood Pressure - physiology
Cardiovascular System - innervation
Exercise Test
Female
Fundamental and applied biological sciences. Psychology
Hand Strength - physiology
Heart Rate - physiology
Humans
Isometric Contraction - physiology
Male
Mechanoreceptors
Oxygen Consumption
Physiology & Biochemistry
Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports
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Summary:Abstract Isometric handgrip (IHG) remains a well-studied cardiovascular and autonomic stimulus, however the effects of rhythmic IHG protocols remain largely unknown. The purpose of this study was to investigate the acute effects of 4 IHG protocols on blood pressure (BP) and neurocardiac reactivity and recovery responses. 12 healthy older participants (70±5 yrs, ♀=4) each completed 4 bilateral 12-min protocols (sham, IHG1, IHG2, IHG3) on separate visits. IHG1, IHG2, and IHG3 consisted of 4×2-min, 8×1-min, and 16×30-s isometric contractions, respectively, each completed at 30% MVC, while sham consisted of 4×2-min contractions completed at 3% MVC. BP and neurocardiac modulation were assessed during and following each protocol. Systolic BP (SBP) reactivity was increased during IHG1 compared to IHG2 (p
ISSN:0172-4622
1439-3964
DOI:10.1055/s-0030-1268473