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[{"key": "dc.contributor.author", "value": "Tikkanen, Olli", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2017-01-30T12:22:13Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2017-01-30T12:22:13Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2006", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1672422", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/52896", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Acute effects and recovery from exercise-induced fatigue is widely studied, but there is a lack of data \r\nconcerning adaptations to acute fatigue with strength training. The purpose of this study was to \r\nexamine neural responses to fatiguing heavy-resistance loading (HRL) and investigate neuromuscular \r\nadaptations with strength training. 75 healthy males (age 32 \u00b1 8 years) divided randomly into the \r\ncontrol (n=23) and training group (n=52) attained in 20 weeks of strength training. Before and after 20 \r\nweeks of strength training subjects carried out HRL comprising of 5 sets of 10 maximal bilateral knee \r\nextensions (10 RM). Maximal voluntary force, M-wave and twitch characteristics were measured \r\nbefore and after HRL and electromyographic (EMG) activity continuously during the HRL. Blood \r\nlactate concentrations were determined before, immediately after, and 15 and 30 minutes after the \r\nHRL. \r\nIn the training group torque, power and load used during the HRL and maximal voluntary contraction \r\n(MVC) torque of knee extension and aEMG during MVC increased with strength training. MVC \r\ntorque decreased on average 21 \u00b1 12 % after HRL. There were no changes in lactate responses with \r\ntraining except pre-loading for the training group. In the control group lactate concentrations were \r\nsignificantly smaller at all time points at week 20 than at week 0. In the 4th and 5th sets mean power \r\nfrequency of EMG was significantly lower (p<0.001) and in the 2nd set higher (p<0.05) after the \r\ntraining than before training. HRL resulted in significant decreases in peak tension (PT), contraction \r\ntime (CT), rate of force development (RFD) and a significant increase in half-relaxation time (HRT) of \r\nthe twitch. Relative, percentual changes (between pre-loading and post-loading state) in twitch \r\ncharacteristics were not significantly different between week 0 and week 20. HRT increased \r\nsignificantly due to HRL at week 0 (P<0.05) but not at week 20. No significant differences were \r\nobserved in post-activation potentiation (PAP) between the corresponding week 0 and week 20 values. \r\nIn the training group pre-loading PAP values were significantly different from post-loading values \r\n(P=0.01) at week 0, but not at week 20. An increase in duration of M-wave was observed after HRL in \r\nrectus femoris (P<0.05) and vastus medialis (P<0.05) before and after strength training. There were no \r\nsignificant changes in M-wave amplitude between pre- and post-loading values or any training induced \r\nchanges in M-wave amplitude or duration. \r\nTorque, power and mean power frequency decreased during HRL. Neural input (indicated by aEMG) \r\nto muscle did not decrease during the HRL indicating that fatigue is mostly peripheral in origin in \r\nintermittent, multiple repetition loadings, such as the loading used in this study. All in all HRL induced \r\nfatigue changes were as expected from previous knowledge. Torque, power and neural input to \r\nmuscles increased with strength training. Power was increased only for the two first sets and after that \r\nfatigue prevented usage of improved power. Strength training did not have effect on characteristics of \r\nthe M-wave or twitch except HRT. Increase of HRT due to fatigue can be overcome by strength \r\ntraining. In general effects of strength training were in line with previous studies. In conclusion \r\nmaximal strength oriented training is effective in improving torque and po", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Miia Hakanen (mihakane) on 2017-01-30 12:22:12.727500. Form: Admin-lomake opinn\u00e4ytteiden julkaisuun (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/admin-lomake-opinnaytteet). JyX data: [jyx_publishing-allowed (fi) =False]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2017-01-30T12:22:13Z\r\nNo. of bitstreams: 2\r\nURN:NBN:fi:jyu-201701301307.pdf: 1032621 bytes, checksum: a2d53f154b370e1497f559d18ef7d225 (MD5)\r\nlicense.html: 107 bytes, checksum: a7d86e598caa500b1b433bbb9dc8ef1c (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2017-01-30T12:22:13Z (GMT). No. of bitstreams: 2\r\nURN:NBN:fi:jyu-201701301307.pdf: 1032621 bytes, checksum: a2d53f154b370e1497f559d18ef7d225 (MD5)\r\nlicense.html: 107 bytes, checksum: a7d86e598caa500b1b433bbb9dc8ef1c (MD5)\r\n Previous issue date: 2006", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (64 sivua)", "language": null, "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": "Strength training", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "heavy-resistance loading", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "fatigue", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "EMG", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "twitch", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "M-wave", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Neural responses to fatiguing heavy-resistance loading before and after prolonged strength training", "language": null, "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-201701301307", "language": null, "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": "Liikuntabiologian laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biology of Physical Activity", "language": "en", "element": 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Aineisto on luettavissa Jyv\u00e4skyl\u00e4n yliopiston kirjaston arkistoty\u00f6asemalta. Ks. https://kirjasto.jyu.fi/fi/tyoskentelytilat/laitteet-ja-tilat.", "language": "fi", "element": "rights", "qualifier": "accessrights", "schema": "dc"}, {"key": "dc.rights.accessrights", "value": "This material has a restricted access due to copyright reasons. It can be read at the workstation at Jyv\u00e4skyl\u00e4 University Library reserved for the use of archival materials: https://kirjasto.jyu.fi/en/workspaces/facilities.", "language": "en", "element": "rights", "qualifier": "accessrights", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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