Influence of aging on isometric muscle strength, fat-free mass and electromyographic signal power of the upper and lower limbs in women
Aging is a multifactorial process that leads to changes in the quantity and quality of skeletal muscle and contributes to decreased levels of muscle strength. This study sought to investigate whether the isometric muscle strength, fat-free mass (FFM) and power of the electromyographic (EMG) signal o...
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| Veröffentlicht in: | Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil)) Brazil)), 2014-03, Vol.18 (2), p.183-190 |
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| creator | Amaral, Josária F Alvim, Felipe C Castro, Eliane A Doimo, Leonice A Silva, Marcus V Novo Júnior, José M |
| description | Aging is a multifactorial process that leads to changes in the quantity and quality of skeletal muscle and contributes to decreased levels of muscle strength.
This study sought to investigate whether the isometric muscle strength, fat-free mass (FFM) and power of the electromyographic (EMG) signal of the upper and lower limbs of women are similarly affected by aging.
The sample consisted of 63 women, who were subdivided into three groups (young (YO) n=33, 24.7 ± 3.5 years; middle age (MA) n=15, 58.6 ± 4.2 years; and older adults (OA). n=15, 72.0 ± 4.2 years). Isometric strength was recorded simultaneously with the capture of the electrical activity of the flexor muscles of the fingers and the vastus lateralis during handgrip and knee extension tests, respectively. FFM was assessed using dual-energy X-ray absorptiometry.
The handgrip strength measurements were similar among groups (p=0.523), whereas the FFM of the upper limbs was lower in group OA compared to group YO (p=0.108). The RMSn values of the hand flexors were similar among groups (p=0.754). However, the strength of the knee extensors, the FFM of the lower limbs and the RMSn values of the vastus lateralis were lower in groups MA (p=0.014, p=0.006 and p=0.013, respectively) and OA (p=0.000, p=0.000 and p |
| doi_str_mv | 10.1590/s1413-35552012005000145 |
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This study sought to investigate whether the isometric muscle strength, fat-free mass (FFM) and power of the electromyographic (EMG) signal of the upper and lower limbs of women are similarly affected by aging.
The sample consisted of 63 women, who were subdivided into three groups (young (YO) n=33, 24.7 ± 3.5 years; middle age (MA) n=15, 58.6 ± 4.2 years; and older adults (OA). n=15, 72.0 ± 4.2 years). Isometric strength was recorded simultaneously with the capture of the electrical activity of the flexor muscles of the fingers and the vastus lateralis during handgrip and knee extension tests, respectively. FFM was assessed using dual-energy X-ray absorptiometry.
The handgrip strength measurements were similar among groups (p=0.523), whereas the FFM of the upper limbs was lower in group OA compared to group YO (p=0.108). The RMSn values of the hand flexors were similar among groups (p=0.754). However, the strength of the knee extensors, the FFM of the lower limbs and the RMSn values of the vastus lateralis were lower in groups MA (p=0.014, p=0.006 and p=0.013, respectively) and OA (p=0.000, p=0.000 and p<0.000, respectively) compared to group YO.
The results of this study demonstrate that changes in isometric muscle strength in MLG and electromyographic activity of the lower limbs are more pronounced with the aging process of the upper limb.</description><identifier>ISSN: 1809-9246</identifier><identifier>ISSN: 1413-3555</identifier><identifier>EISSN: 1809-9246</identifier><identifier>DOI: 10.1590/s1413-35552012005000145</identifier><identifier>PMID: 24676705</identifier><language>eng</language><publisher>Brazil: Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia</publisher><subject>Adipose Tissue ; Adult ; Age Factors ; Aged ; Aging ; Cross-Sectional Studies ; Electromyography ; Female ; Humans ; Lower Extremity - physiology ; Middle Aged ; Muscle Strength ; Original ; ORTHOPEDICS ; REHABILITATION ; Upper Extremity - physiology ; Young Adult</subject><ispartof>Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil)), 2014-03, Vol.18 (2), p.183-190</ispartof><rights>This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c506t-cfe3e5f687c34b6a7757cc92be5461b2f9b931775360fa6a5b4b99601ca4a1633</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4183246/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4183246/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,27924,27925,53791,53793</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24676705$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Amaral, Josária F</creatorcontrib><creatorcontrib>Alvim, Felipe C</creatorcontrib><creatorcontrib>Castro, Eliane A</creatorcontrib><creatorcontrib>Doimo, Leonice A</creatorcontrib><creatorcontrib>Silva, Marcus V</creatorcontrib><creatorcontrib>Novo Júnior, José M</creatorcontrib><title>Influence of aging on isometric muscle strength, fat-free mass and electromyographic signal power of the upper and lower limbs in women</title><title>Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil))</title><addtitle>Braz J Phys Ther</addtitle><description>Aging is a multifactorial process that leads to changes in the quantity and quality of skeletal muscle and contributes to decreased levels of muscle strength.
This study sought to investigate whether the isometric muscle strength, fat-free mass (FFM) and power of the electromyographic (EMG) signal of the upper and lower limbs of women are similarly affected by aging.
The sample consisted of 63 women, who were subdivided into three groups (young (YO) n=33, 24.7 ± 3.5 years; middle age (MA) n=15, 58.6 ± 4.2 years; and older adults (OA). n=15, 72.0 ± 4.2 years). Isometric strength was recorded simultaneously with the capture of the electrical activity of the flexor muscles of the fingers and the vastus lateralis during handgrip and knee extension tests, respectively. FFM was assessed using dual-energy X-ray absorptiometry.
The handgrip strength measurements were similar among groups (p=0.523), whereas the FFM of the upper limbs was lower in group OA compared to group YO (p=0.108). The RMSn values of the hand flexors were similar among groups (p=0.754). However, the strength of the knee extensors, the FFM of the lower limbs and the RMSn values of the vastus lateralis were lower in groups MA (p=0.014, p=0.006 and p=0.013, respectively) and OA (p=0.000, p=0.000 and p<0.000, respectively) compared to group YO.
The results of this study demonstrate that changes in isometric muscle strength in MLG and electromyographic activity of the lower limbs are more pronounced with the aging process of the upper limb.</description><subject>Adipose Tissue</subject><subject>Adult</subject><subject>Age Factors</subject><subject>Aged</subject><subject>Aging</subject><subject>Cross-Sectional Studies</subject><subject>Electromyography</subject><subject>Female</subject><subject>Humans</subject><subject>Lower Extremity - physiology</subject><subject>Middle Aged</subject><subject>Muscle Strength</subject><subject>Original</subject><subject>ORTHOPEDICS</subject><subject>REHABILITATION</subject><subject>Upper Extremity - physiology</subject><subject>Young Adult</subject><issn>1809-9246</issn><issn>1413-3555</issn><issn>1809-9246</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpVUctu1TAUjBCoL_oL4CULUuz4kesNEqqgVKrEomVtOe5xrivHDrbTql_Ab-NwL6Vd2R7PzBnNaZr3BJ8RLvGnTBihLeWcd5h0GHOMMWH8VXNENli2smPi9bP7YXOc812lbSr5oDmsUC96zI-a35fB-gWCARQt0qMLI4oBuRwnKMkZNC3ZeEC5JAhj2X5EVpfWJgA06ZyRDrcIPJiS4vQYx6TnbRVlNwbt0RwfIK2-ZQtomef6WPn-L-zdNGTkAnqoo8Lb5o3VPsPp_jxpfn77enP-vb36cXF5_uWqNRyL0hoLFLgVm95QNgjd97w3RnYDcCbI0Fk5SEoqSgW2Wmg-sEFKgYnRTBNB6UlztvPNxoGP6i4uqUbN6nptVO0bZbXO2irZrILPO8G8DBPcGgglaa_m5CadHlXUTr38CW6rxnivWFXXnqvBh71Bir8WyEVNLhvwXgeIS1aEd4LUzBJXar-jmhRzTmCfxhCs1r2_TPl_71X57nnKJ92_RdM_AJCpPA</recordid><startdate>20140301</startdate><enddate>20140301</enddate><creator>Amaral, Josária F</creator><creator>Alvim, Felipe C</creator><creator>Castro, Eliane A</creator><creator>Doimo, Leonice A</creator><creator>Silva, Marcus V</creator><creator>Novo Júnior, José M</creator><general>Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia</general><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>7X8</scope><scope>5PM</scope><scope>GPN</scope></search><sort><creationdate>20140301</creationdate><title>Influence of aging on isometric muscle strength, fat-free mass and electromyographic signal power of the upper and lower limbs in women</title><author>Amaral, Josária F ; Alvim, Felipe C ; Castro, Eliane A ; Doimo, Leonice A ; Silva, Marcus V ; Novo Júnior, José M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c506t-cfe3e5f687c34b6a7757cc92be5461b2f9b931775360fa6a5b4b99601ca4a1633</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Adipose Tissue</topic><topic>Adult</topic><topic>Age Factors</topic><topic>Aged</topic><topic>Aging</topic><topic>Cross-Sectional Studies</topic><topic>Electromyography</topic><topic>Female</topic><topic>Humans</topic><topic>Lower Extremity - physiology</topic><topic>Middle Aged</topic><topic>Muscle Strength</topic><topic>Original</topic><topic>ORTHOPEDICS</topic><topic>REHABILITATION</topic><topic>Upper Extremity - physiology</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Amaral, Josária F</creatorcontrib><creatorcontrib>Alvim, Felipe C</creatorcontrib><creatorcontrib>Castro, Eliane A</creatorcontrib><creatorcontrib>Doimo, Leonice A</creatorcontrib><creatorcontrib>Silva, Marcus V</creatorcontrib><creatorcontrib>Novo Júnior, José M</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><collection>SciELO</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>Amaral, Josária F</au><au>Alvim, Felipe C</au><au>Castro, Eliane A</au><au>Doimo, Leonice A</au><au>Silva, Marcus V</au><au>Novo Júnior, José M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of aging on isometric muscle strength, fat-free mass and electromyographic signal power of the upper and lower limbs in women</atitle><jtitle>Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil))</jtitle><addtitle>Braz J Phys Ther</addtitle><date>2014-03-01</date><risdate>2014</risdate><volume>18</volume><issue>2</issue><spage>183</spage><epage>190</epage><pages>183-190</pages><issn>1809-9246</issn><issn>1413-3555</issn><eissn>1809-9246</eissn><abstract>Aging is a multifactorial process that leads to changes in the quantity and quality of skeletal muscle and contributes to decreased levels of muscle strength.
This study sought to investigate whether the isometric muscle strength, fat-free mass (FFM) and power of the electromyographic (EMG) signal of the upper and lower limbs of women are similarly affected by aging.
The sample consisted of 63 women, who were subdivided into three groups (young (YO) n=33, 24.7 ± 3.5 years; middle age (MA) n=15, 58.6 ± 4.2 years; and older adults (OA). n=15, 72.0 ± 4.2 years). Isometric strength was recorded simultaneously with the capture of the electrical activity of the flexor muscles of the fingers and the vastus lateralis during handgrip and knee extension tests, respectively. FFM was assessed using dual-energy X-ray absorptiometry.
The handgrip strength measurements were similar among groups (p=0.523), whereas the FFM of the upper limbs was lower in group OA compared to group YO (p=0.108). The RMSn values of the hand flexors were similar among groups (p=0.754). However, the strength of the knee extensors, the FFM of the lower limbs and the RMSn values of the vastus lateralis were lower in groups MA (p=0.014, p=0.006 and p=0.013, respectively) and OA (p=0.000, p=0.000 and p<0.000, respectively) compared to group YO.
The results of this study demonstrate that changes in isometric muscle strength in MLG and electromyographic activity of the lower limbs are more pronounced with the aging process of the upper limb.</abstract><cop>Brazil</cop><pub>Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia</pub><pmid>24676705</pmid><doi>10.1590/s1413-35552012005000145</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil)), 2014-03, Vol.18 (2), p.183-190 |
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| language | eng |
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| source | MEDLINE; EZB-FREE-00999 freely available EZB journals; PubMed Central |
| subjects | Adipose Tissue Adult Age Factors Aged Aging Cross-Sectional Studies Electromyography Female Humans Lower Extremity - physiology Middle Aged Muscle Strength Original ORTHOPEDICS REHABILITATION Upper Extremity - physiology Young Adult |
| title | Influence of aging on isometric muscle strength, fat-free mass and electromyographic signal power of the upper and lower limbs in women |
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