{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1362825895187675264.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1152/jappl.1989.66.4.1593"}},{"identifier":{"@type":"URI","@value":"https://www.physiology.org/doi/pdf/10.1152/jappl.1989.66.4.1593"}}],"dc:title":[{"@value":"Changes of muscular sound during sustained isometric contraction up to exhaustion"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p> The sound (SMG) generated by the biceps muscle during isometric exercise at 20, 40, 60, and 80% of maximum voluntary contraction (MVC) up to exhaustion has been recorded by a contact transducer and integrated (iSMG), together with the surface electromyogram (EMG) in eight young untrained men. At the onset of exercise, iSMG and integrated surface EMG (iEMG) amplitude increased linearly with exercise. iSMG remained constant for 253 +/- 73 (SD), 45 +/- 16, 21 +/- 5, and 0 s at the four levels of contraction. Then iSMG increased linearly at 20% MVC, fluctuated at 40% MVC, and decreased exponentially at 60 and 80% MVC. iSMG exhaustion-to-onset ratio was 5.0 at 20%, 1.0 at 40%, and 0.2 at 60 and 80% MVC. On the contrary, independently of exercise intensity, iEMG increased with time, being 1.4 higher at exhaustion than at the onset. The nonunivocal iSMG changes with time and effort of exercise suggest that the sound may be a useful tool to acquire different information to EMG and output force during muscle contraction up to fatigue. </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382825895187675266","@type":"Researcher","foaf:name":[{"@value":"C. Orizio"}],"jpcoar:affiliationName":[{"@value":"Dipartimento di Scienze Biomediche e Biotecnologie, Universita di Brescia, Italy."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895187675265","@type":"Researcher","foaf:name":[{"@value":"R. Perini"}],"jpcoar:affiliationName":[{"@value":"Dipartimento di Scienze Biomediche e Biotecnologie, Universita di Brescia, Italy."}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895187675264","@type":"Researcher","foaf:name":[{"@value":"A. Veicsteinas"}],"jpcoar:affiliationName":[{"@value":"Dipartimento di Scienze Biomediche e Biotecnologie, Universita di Brescia, Italy."}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"87507587"},{"@type":"EISSN","@value":"15221601"},{"@type":"PISSN","@value":"https://id.crossref.org/issn/87507587"},{"@type":"PISSN","@value":"http://id.crossref.org/issn/87507587"}],"prism:publicationName":[{"@value":"Journal of Applied Physiology"}],"dc:publisher":[{"@value":"American Physiological Society"}],"prism:publicationDate":"1989-04-01","prism:volume":"66","prism:number":"4","prism:startingPage":"1593","prism:endingPage":"1598"},"reviewed":"false","url":[{"@id":"https://www.physiology.org/doi/pdf/10.1152/jappl.1989.66.4.1593"}],"createdAt":"2017-12-21","modifiedAt":"2019-09-08","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390001204786828288","@type":"Article","resourceType":"学術雑誌論文(journal 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Mechanomyographic Signals during Measurement of Agonist and Antagonist Muscles in Sustained Isometric Muscle Contractions  The Influence of the Force Tremor"},{"@value":"Comparison of an Accelerometer and a Condenser Microphone for Mechanomyographic Signals during Measurement of Agonist and Antagonist Muscles in Sustained Isometric Muscle Contractions"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679763463296","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Mechanomyogram and Electromyogram Responses of Upper Limb During Sustained Isometric Fatigue with Varying Shoulder and Elbow Postures."}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679897230720","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"MOTOR UNIT MECHANOMYOGRAPHIC SIGNAL AND SYNCHRONIZED ACTIVITY IN MOTOR UNITS DURING VOLUNTARY MUSCLE CONTRACTIONS"},{"@language":"ja","@value":"持続的筋力発揮時の運動単位筋振動信号と運動単位の同期化活動"},{"@language":"ja-Kana","@value":"ジゾクテキ キンリョク ハッキジ ノ ウンドウ タンイキン シンドウ シンゴウ ト ウンドウ タンイ ノ ドウキカ カツドウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679897381504","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"持久的な間欠的筋力発揮時の筋音（筋振動信号）の変化動態"},{"@language":"en","@value":"Mechanomyographical signals during prolonged intermittent muscular contractions at low levels under various duty cycles"},{"@language":"ja-Kana","@value":"ジキュウテキ ナ カンケツテキ キンリョク ハッキジ ノ キンオン(キン シンドウ シンゴウ)ノ ヘンカ ドウタイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679899660032","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"RELATIONSHIP BETWEEN INTER-SPIKE INTERVAL AND AMPLITUDE OF MECHANOMYOGRAPHIC SIGNAL FROM SINGLE MOTOR UNITS DURING VOLUNTARY MUSCLE 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