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[{"key": "dc.contributor.advisor", "value": "Ahtiainen, Juha", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Rajalainen, Ville", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2021-06-24T06:31:29Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2021-06-24T06:31:29Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2021", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/76826", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Eccentric and concentric strength training have been studied and compared since 1890\u2019s. Studies have reported mixing results regarding strength gains. Also, research focusing on the effects of these training modalities on variables of power output is scarce. Dynamic Strength Index (DSI) has been proposed to be an effective tool of assessing athlete\u2019s strength qualities to direct future strength training optimally. DSI is described as peak force in dynamic movement divided by peak force in the subsequent isometric effort. Few studies have examined the effects of strength training on DSI, and no previous studies have compared the effects of concentric and eccentric strength training protocols. This study aimed to compare the effects of eccentric and concentric strength training on maximum strength, DSI, and maximal power output in untrained or recreationally trained adults. \nA total of 46 participants, including both men and women, completed the training intervention with maximal isolated isokinetic concentric or eccentric bench press exercises with a custom-made bench press device. Participants were divided in to concentric (CON, n=24, 30.0 \u00b1 4.1 years, 1.73 \u00b1 0.10 m, 72.0 \u00b1 11.3 kg, 23.8 \u00b1 2.7 BMI) and eccentric (ECC, n=22, 27.7 \u00b1 5.2 years, 1.73 \u00b1 0.07 m, 74.1 \u00b1 10.5 kg, 24.7 \u00b1 3.2 BMI) training groups with similar 1RM in dynamic bench press at baseline (p=0.94). Both groups trained twice per week for 10 weeks with PRE measurements at week 1, MID measurements at week 6, and POST measurements at week 10. 1RM test, isometric bench press, and bench press throw (BPT) with loads of 30%, 45%, and 60% of 1RM were performed at each testing session. Peak force in the isometric bench press and BPT were used to calculate DSI.\nNo differences between the training methods were observed in 1RM, DSI, isometric bench press or BPT related variables. 1RM increased in both concentric and eccentric training groups from 57.6 \u00b1 20.2kg to 59.3 \u00b1 19.9kg and 56.7 \u00b1 19.4kg to 61.1 \u00b1 20.2kg PRE to MID, respectively (p<0.001). Both CON and ECC training groups increased their 1RM to 64.0 \u00b1 21.3kg and 63.9 \u00b1 19.9kg MID to POST, respectively (p<0.001). Peak force in isometric bench press increased from PRE to POST (p<0.05) and from MID to POST in both groups (ECC: 613.3 \u00b1 190.4N to 659.1 \u00b1 190.8N, p<0.001; CON: 599.0 \u00b1 198.2N to 636.8 \u00b1 209.9N, p<0.05). Peak force in BPT increased only in CON group with 60% 1RM load from PRE to POST (ECC: 153.7 \u00b1 62.8 to 149.5 \u00b1 60.7N; CON: 149.5 \u00b1 59.3 to 171.0 \u00b1 71.8N, p<0.05). Both groups increased their peak power from PRE to POST condition with all loads (30%1RM; ECC: 527.9 \u00b1 178.4W to 548.4 \u00b1 207.9W; CON: 490.1 \u00b1 202.1W to 540.2 \u00b1 178.4W, 45%1RM; ECC: 479.8 \u00b1 190.7W to 552.5 \u00b1 211.6W; CON: 447.5 \u00b1 203.7W to 493.7 \u00b1 179.3W; 60%1RM; ECC: 448.0 \u00b1 164.7W to 497.8 \u00b1 178.6W; CON: 412.3 \u00b1 138.5W to 448.7 \u00b1 143.3W). \nThe present study showed that maximal isokinetic eccentric and concentric bench press strength training for 10 weeks induced similar changes in bench press 1RM, isometric peak force, and BPT performance. No changes in DSI were observed, although isometric peak force increased in both groups.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2021-06-24T06:31:29Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2021-06-24T06:31:29Z (GMT). No. of bitstreams: 0\n Previous issue date: 2021", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "62", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "bench press exercise", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "isometric bench press", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "bench press throw", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "isokinetic strength training", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Effects of eccentric and concentric strength training on maximum strength, power variables and dynamic strength index", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202106244021", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Liikuntatieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sport and Health Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Liikunta- ja terveystieteet", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Sport and Health Sciences", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Valmennus- ja testausoppi", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Science in Sport Coaching and Fitness Testing", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "5013", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "voimaharjoittelu", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "strength training", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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