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dc.contributor.advisorAhtiainen, Dr Juha
dc.contributor.authorWanttaja, Ryan
dc.date.accessioned2020-06-17T03:58:44Z
dc.date.available2020-06-17T03:58:44Z
dc.date.issued2020
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/69991
dc.description.abstractBackground. Engaging in resistance training programmes is an integral part of the physical preparation process for athletes. The neural and morphological mechanisms underpinning eccentric contractions are notably different from concentric and isometric contractions and remain less understood. Performing compound movements with an eccentric load greater than the individual’s maximum strength capacity has become a popular interest in the quest to understanding how the neuromuscular system adapts acutely and chronically. Reversible physiological adaptations occur if there is a short-term insufficient training stimulus and thus, meticulous physical preparation planning is essential. The purpose of this study was to investigate the differences in strength and CSA between groups, and to compare the changes that occurred as a result of training between- and within-groups. Methods. Subjects (n = 17) were randomly assigned to an eccentric overload (n = 9) or concentric (n = 8) training group. The males were physically fit and had engaged in recreational resistance training prior to the study. Training took place twice per week on non-consecutive days for a duration of 10 weeks, after which, five weeks of detraining. Contractions were performed in isolation with the volume and intensity ranging between three to four sets and repetitions. Maximum dynamic strength was found using a smith machine bench press in accordance to 1RM testing procedures; maximum isometric strength was performed on a bench press set-up with an immovable bar. Triceps brachii CSA was measured via panoramic ultrasonography. Strength and CSA was measured three times: pre-test, post-test and after detraining. Results. There was a significant, within-group difference in absolute 1RM bench press strength for the eccentric training group (p < .05) from pre- to post-test, but not for the concentric group. Isometric strength increased to a greater extent for the concentric group, however, the mean change between groups was not significant (p > .05). A greater mean increase in combined triceps brachii CSA was found for the eccentric group which remained above baseline values after detraining unlike the concentric group. There was however a strong correlation (r = 0.74) between the change in combined CSA and change in isometric strength for the concentric group as a result of training. Conclusion. This research contributes to an ongoing research interest of eccentric resistance training with eccentric overload, in particular, the upper extremity musculature. Each contraction type performed in isolation was not significantly different from one another, however, performing these can elicit significant changes in antagonist muscle cross-sectional area, dynamic and isometric strength with training.en
dc.format.extent58
dc.language.isoen
dc.subject.othereccentric
dc.subject.otherhypertrophy
dc.subject.otheroverload
dc.subject.otheraccentuated
dc.titleEffects of eccentric and concentric isokinetic bench press training on dynamic strength, isometric force production and triceps brachii cross-sectional area
dc.identifier.urnURN:NBN:fi:jyu-202006174224
dc.type.ontasotMaster’s thesisen
dc.type.ontasotPro gradu -tutkielmafi
dc.contributor.tiedekuntaLiikuntatieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sport and Health Sciencesen
dc.contributor.laitosLiikunta- ja terveystieteetfi
dc.contributor.laitosSport and Health Sciencesen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.oppiaineValmennus- ja testausoppifi
dc.contributor.oppiaineScience in Sport Coaching and Fitness Testingen
dc.rights.copyrightJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.rights.copyrightThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.contributor.oppiainekoodi5013
dc.subject.ysovoimaharjoittelu
dc.subject.ysostrength training


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