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dc.contributor.authorFinni Juutinen, Taija
dc.contributor.authorKomi, Paavo
dc.contributor.authorLepola, Vesa
dc.date.accessioned2015-10-23T03:37:48Z
dc.date.available2015-10-23T03:37:48Z
dc.date.issued2000fi
dc.identifier.citationFinni Juutinen, T., Komi, P., & Lepola, V. (2000). In vivo triceps surae and quadriceps femoris muscle function in a squat jump and counter movement jump. <em>European Journal of Applied Physiology</em>, 83 (4), 416-426. <a href="http://dx.doi.org/10.1007/s004210000289">doi:10.1007/s004210000289</a>fi
dc.identifier.otherTUTKAID_1283
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/47373
dc.description.abstractAn optic fibre method was used to measure in humans in vivo Achilles (ATF) and patellar tendon forces (PTF) during submaximal squat jumps (SJ) and counter movement jumps (CMJ). Normal two-legged jumps on a force plate and one-legged jumps on a sledge apparatus were made by four volunteers. Kinetics, kinematics, and muscle activity from seven muscles were recorded. The loading patterns of the tendomuscular system differed among the jumping conditions, but were similar when the jumping height was varied. Peak PTF were greater than ATF in each condition. In contrast to earlier simulation studies it was observed that tendomuscular force could continue to increase during the shortening of muscle-tendon unit in CMJ. The concentric tendomuscular output was related to the force at the end of the stretching phase while the enhancement of the output in CMJ compared to SJ could not be explained by increases in muscle activity. The stretching phase in CMJ was characterised by little or no electromyogram activity. Therefore, the role of active stretch in creating beneficial conditions for the utilisation of elastic energy in muscle was only minor in these submaximal performances. The modelling, as used in the present study, showed, however, that tendon underwent a stretch-shortening cycle, thus having potential for elastic energy storage and utilisation. In general, the interaction between muscle and tendon components may be organised in a manner that takes advantage of the basic properties of muscle at given submaximal and variable activity levels of normal human locomotion.fi
dc.language.isoeng
dc.publisherSpringer-Verlag
dc.relation.ispartofseriesEuropean Journal of Applied Physiology
dc.relation.urihttp://link.springer.com/journal/421
dc.rights
dc.subject.othermuscle mechanicsfi
dc.subject.othertendon forcefi
dc.subject.othermuscle-tendon interactionfi
dc.subject.otherpowerfi
dc.subject.otheroptic fibrefi
dc.titleIn vivo triceps surae and quadriceps femoris muscle function in a squat jump and counter movement jumpfi
dc.identifier.urnURN:NBN:fi:jyu-201510233461
dc.contributor.laitosLiikuntabiologian laitosfi
dc.contributor.laitosDepartment of Biology of Physical Activityen
dc.type.urihttp://purl.org/eprint/type/SubmittedJournalArticle
dc.date.updated2015-10-23T03:15:09Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.format.pagerange416-426
dc.relation.issn1439-6327
dc.relation.volume83
dc.type.versionacceptedVersion
dc.rights.copyright© Springer. This is a final draft version of an article whose final and definitive form has been published by Springer.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1007/s004210000289


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