Heart rate responses during isometric exercises in patients undergoing a phase III cardiac rehabilitation program
Background: The magnitude of cardiovascular responses is dependent on the static and dynamic components as well as the duration and intensity of the contraction performed. Objective: To evaluate the heart rate responses to different percentages of isometric contractions in 12 patients (63 plus or mi...
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| Veröffentlicht in: | Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil)) Brazil)), 2010-09, Vol.14 (5), p.383-389 |
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| description | Background: The magnitude of cardiovascular responses is dependent on the static and dynamic components as well as the duration and intensity of the contraction performed. Objective: To evaluate the heart rate responses to different percentages of isometric contractions in 12 patients (63 plus or minus 11.6 years) with coronary artery disease and/or risk factors for coronary artery disease that were participating in a phase III cardiac rehabilitation program. Methods: Heart rate variation ( Delta HR) was evaluated during maximum (MVC, five and ten seconds in duration) and submaximal (SMVC, 30 and 60% of MVC-5, until muscle exhaustion) voluntary contraction, using a handgrip dynamometer. Additionally, the representative index of cardiac vagal modulation (RMSSD index) was calculated at rest (pre-contraction), at the final 30 seconds of SMVC and during recovery (post-contraction). Results: Delta HR showed higher values in MVC-10 versus MVC-5 (17 plus or minus 5.5 vs 12 plus or minus 4.2 bpm, p |
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| fullrecord | <record><control><sourceid>proquest</sourceid><recordid>TN_cdi_proquest_miscellaneous_860390126</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>860390126</sourcerecordid><originalsourceid>FETCH-proquest_miscellaneous_8603901263</originalsourceid><addsrcrecordid>eNqNjLsOgkAQRbfQxOc_TGdFsogYrY0GenszLiOMgV2cWRI_X0z8AKtbnHPuxMzTXZolWZ7nM7NQfVqbH9KtnZtXQSgRBCOBkPbBKylUg7CvgTV0FIUd0JvE8Rexhx4jk48Kg69I6vBVEfoGlaAsS3AoFaMb_xq8c8tx9MOYSagFu5WZPrBVWv92aTaX8_VUJCN_DaTx1rE6alv0FAa9HfY2O9p0u8_-Nz-vzU8E</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>860390126</pqid></control><display><type>article</type><title>Heart rate responses during isometric exercises in patients undergoing a phase III cardiac rehabilitation program</title><source>EZB-FREE-00999 freely available EZB journals</source><creator>Leite, PH ; Melo, R C ; Mello, M F ; da Silva, E ; Borghi-Silva, A ; Catai, A M</creator><creatorcontrib>Leite, PH ; Melo, R C ; Mello, M F ; da Silva, E ; Borghi-Silva, A ; Catai, A M</creatorcontrib><description><![CDATA[Background: The magnitude of cardiovascular responses is dependent on the static and dynamic components as well as the duration and intensity of the contraction performed. Objective: To evaluate the heart rate responses to different percentages of isometric contractions in 12 patients (63 plus or minus 11.6 years) with coronary artery disease and/or risk factors for coronary artery disease that were participating in a phase III cardiac rehabilitation program. Methods: Heart rate variation ( Delta HR) was evaluated during maximum (MVC, five and ten seconds in duration) and submaximal (SMVC, 30 and 60% of MVC-5, until muscle exhaustion) voluntary contraction, using a handgrip dynamometer. Additionally, the representative index of cardiac vagal modulation (RMSSD index) was calculated at rest (pre-contraction), at the final 30 seconds of SMVC and during recovery (post-contraction). Results: Delta HR showed higher values in MVC-10 versus MVC-5 (17 plus or minus 5.5 vs 12 plus or minus 4.2 bpm, p<0.05) and the SMVC-60 vs SMVC-30 (19 plus or minus 5.8 vs 15 plus or minus 5.1 bpm, p<0.05). However, results for CVM-10 showed similar Delta HR compared to results for CVSM (p> 0.05). RICVM at rest decreased (p<0.05) during SMVC-30 (30% = 27.9 plus or minus 17.1 vs 12.9 plus or minus 8.5 ms) and SMVC-60 (60% = 25.8 plus or minus 18.2 vs 9.96 plus or minus 4.2 ms), but returned to the baseline values when the contraction was interrupted. Conclusions: In patients with coronary artery disease and/or risk factors for coronary heart disease, low intensity isometric contraction, maintained over long periods of time, presents the same effect on the responses of HR, compared to a high intensity or maximal isometric contraction of briefly duration.Original Abstract: Contextualizacao: A magnitude das respostas cardiovasculares depende dos componentes estatico e dinamico bem como da duracao e intensidade da contracao realizada. Objetivo: Avaliar as respostas da frequencia cardiaca (FC) frente a diferentes percentuais de contracao isometrica em 12 pacientes (63 plus or minus 11,6 anos; media plus or minus dp) com doenca da arteria coronaria e/ou fatores de risco para ela, participantes de urn programa de reabilitacao cardiaca fase III. Metodos: A variacao da frequencia cardiaca ( Delta FC) foi avaliada durante as contracoes voluntarias maximas (CVM; 5" e 10" de duracao) e submaximas (CVSM; 30 e 60% da CVM-5, ate exaustao muscular) de preensao palmar, utilizando-se um dinamometro (hand grip). Adicionalmente, o RMSSD dos iR-R em ms (indice representante da modulacao vagal cardiaca) foi calculado em repouso (pre-contracao) nos ultimos 30 segundos da CVSM e na recuperacao (poscontracao). Resultados: A Delta FC apresentou maiores valores em CVM-10 vs CVM-5 (17 plus or minus 5,5 vs 12 plus or minus 4,2 bpm, p<0,05) e no CVSM-60 vs CVSM-30 (19 plus or minus 5,8 vs 15 plus or minus 5,1 bpm, p<0,05). No entanto, os resultados para CVM-10 mostraram Delta FC similar quando comparados aos resultados obtidos para CVSM (p>0,05). RMSSD de repouso reduziu-se (p<0,05) durante a CVSM-30 (30%=29,9 plus or minus 17,1 vs 12,9 plus or minus 8,5ms) e CVSM-60 (60%=25,8 plus or minus 18,2 vs 9,96 plus or minus 4,2 ms), mas retornou aos valores basais quando a contracao foi interrompida. Conclusoes: Em pacientes com doenca da arteria coronaria e/ou fatores de risco para ela, a contracao isometrica de baixa intensidade mantida por longos periodos de tempo apresenta os mesmos efeitos sobre as respostas da FC, quando comparada a contracao isometrica de alta ou maxima intensidade, porem de breve duracao.]]></description><identifier>ISSN: 1413-3555</identifier><language>por</language><ispartof>Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil)), 2010-09, Vol.14 (5), p.383-389</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780</link.rule.ids></links><search><creatorcontrib>Leite, PH</creatorcontrib><creatorcontrib>Melo, R C</creatorcontrib><creatorcontrib>Mello, M F</creatorcontrib><creatorcontrib>da Silva, E</creatorcontrib><creatorcontrib>Borghi-Silva, A</creatorcontrib><creatorcontrib>Catai, A M</creatorcontrib><title>Heart rate responses during isometric exercises in patients undergoing a phase III cardiac rehabilitation program</title><title>Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil))</title><description><![CDATA[Background: The magnitude of cardiovascular responses is dependent on the static and dynamic components as well as the duration and intensity of the contraction performed. Objective: To evaluate the heart rate responses to different percentages of isometric contractions in 12 patients (63 plus or minus 11.6 years) with coronary artery disease and/or risk factors for coronary artery disease that were participating in a phase III cardiac rehabilitation program. Methods: Heart rate variation ( Delta HR) was evaluated during maximum (MVC, five and ten seconds in duration) and submaximal (SMVC, 30 and 60% of MVC-5, until muscle exhaustion) voluntary contraction, using a handgrip dynamometer. Additionally, the representative index of cardiac vagal modulation (RMSSD index) was calculated at rest (pre-contraction), at the final 30 seconds of SMVC and during recovery (post-contraction). Results: Delta HR showed higher values in MVC-10 versus MVC-5 (17 plus or minus 5.5 vs 12 plus or minus 4.2 bpm, p<0.05) and the SMVC-60 vs SMVC-30 (19 plus or minus 5.8 vs 15 plus or minus 5.1 bpm, p<0.05). However, results for CVM-10 showed similar Delta HR compared to results for CVSM (p> 0.05). RICVM at rest decreased (p<0.05) during SMVC-30 (30% = 27.9 plus or minus 17.1 vs 12.9 plus or minus 8.5 ms) and SMVC-60 (60% = 25.8 plus or minus 18.2 vs 9.96 plus or minus 4.2 ms), but returned to the baseline values when the contraction was interrupted. Conclusions: In patients with coronary artery disease and/or risk factors for coronary heart disease, low intensity isometric contraction, maintained over long periods of time, presents the same effect on the responses of HR, compared to a high intensity or maximal isometric contraction of briefly duration.Original Abstract: Contextualizacao: A magnitude das respostas cardiovasculares depende dos componentes estatico e dinamico bem como da duracao e intensidade da contracao realizada. Objetivo: Avaliar as respostas da frequencia cardiaca (FC) frente a diferentes percentuais de contracao isometrica em 12 pacientes (63 plus or minus 11,6 anos; media plus or minus dp) com doenca da arteria coronaria e/ou fatores de risco para ela, participantes de urn programa de reabilitacao cardiaca fase III. Metodos: A variacao da frequencia cardiaca ( Delta FC) foi avaliada durante as contracoes voluntarias maximas (CVM; 5" e 10" de duracao) e submaximas (CVSM; 30 e 60% da CVM-5, ate exaustao muscular) de preensao palmar, utilizando-se um dinamometro (hand grip). Adicionalmente, o RMSSD dos iR-R em ms (indice representante da modulacao vagal cardiaca) foi calculado em repouso (pre-contracao) nos ultimos 30 segundos da CVSM e na recuperacao (poscontracao). Resultados: A Delta FC apresentou maiores valores em CVM-10 vs CVM-5 (17 plus or minus 5,5 vs 12 plus or minus 4,2 bpm, p<0,05) e no CVSM-60 vs CVSM-30 (19 plus or minus 5,8 vs 15 plus or minus 5,1 bpm, p<0,05). No entanto, os resultados para CVM-10 mostraram Delta FC similar quando comparados aos resultados obtidos para CVSM (p>0,05). RMSSD de repouso reduziu-se (p<0,05) durante a CVSM-30 (30%=29,9 plus or minus 17,1 vs 12,9 plus or minus 8,5ms) e CVSM-60 (60%=25,8 plus or minus 18,2 vs 9,96 plus or minus 4,2 ms), mas retornou aos valores basais quando a contracao foi interrompida. Conclusoes: Em pacientes com doenca da arteria coronaria e/ou fatores de risco para ela, a contracao isometrica de baixa intensidade mantida por longos periodos de tempo apresenta os mesmos efeitos sobre as respostas da FC, quando comparada a contracao isometrica de alta ou maxima intensidade, porem de breve duracao.]]></description><issn>1413-3555</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqNjLsOgkAQRbfQxOc_TGdFsogYrY0GenszLiOMgV2cWRI_X0z8AKtbnHPuxMzTXZolWZ7nM7NQfVqbH9KtnZtXQSgRBCOBkPbBKylUg7CvgTV0FIUd0JvE8Rexhx4jk48Kg69I6vBVEfoGlaAsS3AoFaMb_xq8c8tx9MOYSagFu5WZPrBVWv92aTaX8_VUJCN_DaTx1rE6alv0FAa9HfY2O9p0u8_-Nz-vzU8E</recordid><startdate>20100901</startdate><enddate>20100901</enddate><creator>Leite, PH</creator><creator>Melo, R C</creator><creator>Mello, M F</creator><creator>da Silva, E</creator><creator>Borghi-Silva, A</creator><creator>Catai, A M</creator><scope>7TS</scope></search><sort><creationdate>20100901</creationdate><title>Heart rate responses during isometric exercises in patients undergoing a phase III cardiac rehabilitation program</title><author>Leite, PH ; Melo, R C ; Mello, M F ; da Silva, E ; Borghi-Silva, A ; Catai, A M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_miscellaneous_8603901263</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>por</language><creationdate>2010</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Leite, PH</creatorcontrib><creatorcontrib>Melo, R C</creatorcontrib><creatorcontrib>Mello, M F</creatorcontrib><creatorcontrib>da Silva, E</creatorcontrib><creatorcontrib>Borghi-Silva, A</creatorcontrib><creatorcontrib>Catai, A M</creatorcontrib><collection>Physical Education Index</collection><jtitle>Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil))</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Leite, PH</au><au>Melo, R C</au><au>Mello, M F</au><au>da Silva, E</au><au>Borghi-Silva, A</au><au>Catai, A M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Heart rate responses during isometric exercises in patients undergoing a phase III cardiac rehabilitation program</atitle><jtitle>Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil))</jtitle><date>2010-09-01</date><risdate>2010</risdate><volume>14</volume><issue>5</issue><spage>383</spage><epage>389</epage><pages>383-389</pages><issn>1413-3555</issn><abstract><![CDATA[Background: The magnitude of cardiovascular responses is dependent on the static and dynamic components as well as the duration and intensity of the contraction performed. Objective: To evaluate the heart rate responses to different percentages of isometric contractions in 12 patients (63 plus or minus 11.6 years) with coronary artery disease and/or risk factors for coronary artery disease that were participating in a phase III cardiac rehabilitation program. Methods: Heart rate variation ( Delta HR) was evaluated during maximum (MVC, five and ten seconds in duration) and submaximal (SMVC, 30 and 60% of MVC-5, until muscle exhaustion) voluntary contraction, using a handgrip dynamometer. Additionally, the representative index of cardiac vagal modulation (RMSSD index) was calculated at rest (pre-contraction), at the final 30 seconds of SMVC and during recovery (post-contraction). Results: Delta HR showed higher values in MVC-10 versus MVC-5 (17 plus or minus 5.5 vs 12 plus or minus 4.2 bpm, p<0.05) and the SMVC-60 vs SMVC-30 (19 plus or minus 5.8 vs 15 plus or minus 5.1 bpm, p<0.05). However, results for CVM-10 showed similar Delta HR compared to results for CVSM (p> 0.05). RICVM at rest decreased (p<0.05) during SMVC-30 (30% = 27.9 plus or minus 17.1 vs 12.9 plus or minus 8.5 ms) and SMVC-60 (60% = 25.8 plus or minus 18.2 vs 9.96 plus or minus 4.2 ms), but returned to the baseline values when the contraction was interrupted. Conclusions: In patients with coronary artery disease and/or risk factors for coronary heart disease, low intensity isometric contraction, maintained over long periods of time, presents the same effect on the responses of HR, compared to a high intensity or maximal isometric contraction of briefly duration.Original Abstract: Contextualizacao: A magnitude das respostas cardiovasculares depende dos componentes estatico e dinamico bem como da duracao e intensidade da contracao realizada. Objetivo: Avaliar as respostas da frequencia cardiaca (FC) frente a diferentes percentuais de contracao isometrica em 12 pacientes (63 plus or minus 11,6 anos; media plus or minus dp) com doenca da arteria coronaria e/ou fatores de risco para ela, participantes de urn programa de reabilitacao cardiaca fase III. Metodos: A variacao da frequencia cardiaca ( Delta FC) foi avaliada durante as contracoes voluntarias maximas (CVM; 5" e 10" de duracao) e submaximas (CVSM; 30 e 60% da CVM-5, ate exaustao muscular) de preensao palmar, utilizando-se um dinamometro (hand grip). Adicionalmente, o RMSSD dos iR-R em ms (indice representante da modulacao vagal cardiaca) foi calculado em repouso (pre-contracao) nos ultimos 30 segundos da CVSM e na recuperacao (poscontracao). Resultados: A Delta FC apresentou maiores valores em CVM-10 vs CVM-5 (17 plus or minus 5,5 vs 12 plus or minus 4,2 bpm, p<0,05) e no CVSM-60 vs CVSM-30 (19 plus or minus 5,8 vs 15 plus or minus 5,1 bpm, p<0,05). No entanto, os resultados para CVM-10 mostraram Delta FC similar quando comparados aos resultados obtidos para CVSM (p>0,05). RMSSD de repouso reduziu-se (p<0,05) durante a CVSM-30 (30%=29,9 plus or minus 17,1 vs 12,9 plus or minus 8,5ms) e CVSM-60 (60%=25,8 plus or minus 18,2 vs 9,96 plus or minus 4,2 ms), mas retornou aos valores basais quando a contracao foi interrompida. Conclusoes: Em pacientes com doenca da arteria coronaria e/ou fatores de risco para ela, a contracao isometrica de baixa intensidade mantida por longos periodos de tempo apresenta os mesmos efeitos sobre as respostas da FC, quando comparada a contracao isometrica de alta ou maxima intensidade, porem de breve duracao.]]></abstract></addata></record> |
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| title | Heart rate responses during isometric exercises in patients undergoing a phase III cardiac rehabilitation program |
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