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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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| Published in: | International journal of sports medicine 2011-03, Vol.32 (3), p.174-180 |
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| container_end_page | 180 |
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| container_start_page | 174 |
| container_title | International journal of sports medicine |
| container_volume | 32 |
| creator | Millar, P. J. MacDonald, M. J. McCartney, N. |
| description | 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 |
| doi_str_mv | 10.1055/s-0030-1268473 |
| format | article |
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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<0.05), IHG3 (p<0.05), and sham (p<0.01), although during recovery delta SBP was lower following IHG1 (p<0.01), IHG2 (p<0.01), and IHG3 (p<0.05), compared to sham. Sample entropy, a measure of nonlinear heart rate variability was reduced during IHG1 (p<0.01) and IHG2 (p<0.05), while increased following IHG1 (p<0.05) and IHG3 (p<0.05), compared to sham. In conclusion, recovery responses from rhythmic IHG appear independent of contraction and/or rest period frequency-duration relationships. Investigation of rhythmic IHG protocols warrants further examination.]]></description><identifier>ISSN: 0172-4622</identifier><identifier>EISSN: 1439-3964</identifier><identifier>DOI: 10.1055/s-0030-1268473</identifier><identifier>PMID: 21165806</identifier><identifier>CODEN: IJSMDA</identifier><language>eng</language><publisher>Stuttgart: Thieme</publisher><subject>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</subject><ispartof>International journal of sports medicine, 2011-03, Vol.32 (3), p.174-180</ispartof><rights>Georg Thieme Verlag KG Stuttgart · New York</rights><rights>2015 INIST-CNRS</rights><rights>Georg Thieme Verlag KG Stuttgart · New York.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c461t-4d7a10c70384b7b58e0878d38e84a21e8cf37fb58478855b14463b7788620fbc3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.thieme-connect.de/products/ejournals/pdf/10.1055/s-0030-1268473.pdf$$EPDF$$P50$$Gthieme$$H</linktopdf><linktohtml>$$Uhttps://www.thieme-connect.de/products/ejournals/html/10.1055/s-0030-1268473$$EHTML$$P50$$Gthieme$$H</linktohtml><link.rule.ids>314,780,784,3017,3018,27924,27925,54559,54560</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23905907$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21165806$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Millar, P. J.</creatorcontrib><creatorcontrib>MacDonald, M. J.</creatorcontrib><creatorcontrib>McCartney, N.</creatorcontrib><title>Effects of Isometric Handgrip Protocol on Blood Pressure and Neurocardiac Modulation</title><title>International journal of sports medicine</title><addtitle>Int J Sports Med</addtitle><description><![CDATA[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<0.05), IHG3 (p<0.05), and sham (p<0.01), although during recovery delta SBP was lower following IHG1 (p<0.01), IHG2 (p<0.01), and IHG3 (p<0.05), compared to sham. Sample entropy, a measure of nonlinear heart rate variability was reduced during IHG1 (p<0.01) and IHG2 (p<0.05), while increased following IHG1 (p<0.05) and IHG3 (p<0.05), compared to sham. In conclusion, recovery responses from rhythmic IHG appear independent of contraction and/or rest period frequency-duration relationships. Investigation of rhythmic IHG protocols warrants further examination.]]></description><subject>Age Factors</subject><subject>Aged</subject><subject>Aging</subject><subject>Analysis of Variance</subject><subject>Autonomic Nervous System - physiology</subject><subject>Biological and medical sciences</subject><subject>Blood Pressure - physiology</subject><subject>Cardiovascular System - innervation</subject><subject>Exercise Test</subject><subject>Female</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Hand Strength - physiology</subject><subject>Heart Rate - physiology</subject><subject>Humans</subject><subject>Isometric Contraction - physiology</subject><subject>Male</subject><subject>Mechanoreceptors</subject><subject>Oxygen Consumption</subject><subject>Physiology & Biochemistry</subject><subject>Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports</subject><issn>0172-4622</issn><issn>1439-3964</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp90D1PxCAYwHFiNHqero6GxeiC8lroqEY9k_NlOGdCKWhNW05oB7-9XO7USSfCkx8PyR-AI4LPCRbiIiGMGUaEFopLtgUmhLMSsbLg22CCiaSIF5Tugf2U3jEmvCRsF-xRQgqhcDEBixvvnR0SDB7ep9C5ITYWzkxfv8ZmCZ9jGIINLQw9vGpDqPPEpTRGBzOBj26MwZpYN8bCh1CPrRma0B-AHW_a5A435xS83N4srmdo_nR3f305R5YXZEC8loZgKzFTvJKVUA4rqWqmnOKGEqesZ9LnOZdKCVERzgtWyXwpKPaVZVNwut67jOFjdGnQXZOsa1vTuzAmrYSSUgpWZnn2r1xVo7SUimR6vqY2hpSi83oZm87ET02wXjXXSa-a603z_OB4s3usOlf_8O_IGZxsgEnWtD6a3jbp17ESixLL7NDaDW-N65x-D2Psc7-_Pv4Cz8uVlg</recordid><startdate>20110301</startdate><enddate>20110301</enddate><creator>Millar, P. J.</creator><creator>MacDonald, M. J.</creator><creator>McCartney, N.</creator><general>Thieme</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TS</scope><scope>7X8</scope></search><sort><creationdate>20110301</creationdate><title>Effects of Isometric Handgrip Protocol on Blood Pressure and Neurocardiac Modulation</title><author>Millar, P. J. ; MacDonald, M. J. ; McCartney, N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c461t-4d7a10c70384b7b58e0878d38e84a21e8cf37fb58478855b14463b7788620fbc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Age Factors</topic><topic>Aged</topic><topic>Aging</topic><topic>Analysis of Variance</topic><topic>Autonomic Nervous System - physiology</topic><topic>Biological and medical sciences</topic><topic>Blood Pressure - physiology</topic><topic>Cardiovascular System - innervation</topic><topic>Exercise Test</topic><topic>Female</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Hand Strength - physiology</topic><topic>Heart Rate - physiology</topic><topic>Humans</topic><topic>Isometric Contraction - physiology</topic><topic>Male</topic><topic>Mechanoreceptors</topic><topic>Oxygen Consumption</topic><topic>Physiology & Biochemistry</topic><topic>Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Millar, P. J.</creatorcontrib><creatorcontrib>MacDonald, M. J.</creatorcontrib><creatorcontrib>McCartney, N.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Physical Education Index</collection><collection>MEDLINE - Academic</collection><jtitle>International journal of sports medicine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Millar, P. J.</au><au>MacDonald, M. J.</au><au>McCartney, N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Isometric Handgrip Protocol on Blood Pressure and Neurocardiac Modulation</atitle><jtitle>International journal of sports medicine</jtitle><addtitle>Int J Sports Med</addtitle><date>2011-03-01</date><risdate>2011</risdate><volume>32</volume><issue>3</issue><spage>174</spage><epage>180</epage><pages>174-180</pages><issn>0172-4622</issn><eissn>1439-3964</eissn><coden>IJSMDA</coden><abstract><![CDATA[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<0.05), IHG3 (p<0.05), and sham (p<0.01), although during recovery delta SBP was lower following IHG1 (p<0.01), IHG2 (p<0.01), and IHG3 (p<0.05), compared to sham. Sample entropy, a measure of nonlinear heart rate variability was reduced during IHG1 (p<0.01) and IHG2 (p<0.05), while increased following IHG1 (p<0.05) and IHG3 (p<0.05), compared to sham. In conclusion, recovery responses from rhythmic IHG appear independent of contraction and/or rest period frequency-duration relationships. Investigation of rhythmic IHG protocols warrants further examination.]]></abstract><cop>Stuttgart</cop><pub>Thieme</pub><pmid>21165806</pmid><doi>10.1055/s-0030-1268473</doi><tpages>7</tpages></addata></record> |
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| ispartof | International journal of sports medicine, 2011-03, Vol.32 (3), p.174-180 |
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| language | eng |
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| 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 |
| title | Effects of Isometric Handgrip Protocol on Blood Pressure and Neurocardiac Modulation |
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