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dc.contributor.authorStenroth, Lauri
dc.contributor.authorCronin, Neil J
dc.contributor.authorPeltonen, Jussi
dc.contributor.authorKorhonen, Marko T
dc.contributor.authorSipila, Sarianna
dc.contributor.authorFinni, Taija
dc.date.accessioned2021-06-28T23:23:07Z
dc.date.available2021-06-28T23:23:07Z
dc.date.issued2016
dc.identifier.issn8750-7587en_US
dc.identifier.doi10.1152/japplphysiol.00511.2015en_US
dc.identifier.urihttp://hdl.handle.net/10072/405431
dc.description.abstractPrevious studies have shown that aging is associated with alterations in muscle architecture and tendon properties (Morse CI, Thom JM, Birch KM, Narici MV. Acta Physiol Scand 183: 291-298, 2005; Narici MV, Maganaris CN, Reeves ND, Capodaglio P. J Appl Physiol 95: 2229-2234, 2003; Stenroth L, Peltonen J, Cronin NJ, Sipila S, Finni T. J Appl Physiol 113: 1537-1544, 2012). However, the possible influence of different types of regular exercise loading on muscle architecture and tendon properties in older adults is poorly understood. To address this, triceps surae muscle-tendon properties were examined in older male endurance (OE, n = 10, age = 74.0 ± 2.8 yr) and sprint runners (OS, n = 10, age = 74.4 ± 2.8 yr), with an average of 42 yr of regular training experience, and compared with agematched [older control (OC), n = 33, age = 74.8 ± 3.6 yr] and young untrained controls (YC, n = 18, age = 23.7 ± 2.0 yr). Compared with YC, Achilles tendon cross-sectional area (CSA) was 22% (P = 0.022), 45% (P = 0.001), and 71% (P < 0.001) larger in OC, OE, and OS, respectively. Among older groups, OS had significantly larger tendon CSA compared with OC (P = 0.033). No significant between-group differences were observed in Achilles tendon stiffness. In older groups, Young's modulus was 31-44%, and maximal tendon stress 44-55% lower, than in YC (P ≤ 0.001). OE showed shorter soleus fascicle length than both OC (P < 0.05) and YC (P < 0.05). These data suggest that long-term running does not counteract the previously reported age-related increase in tendon CSA, but, instead, may have an additive effect. The greatest Achilles tendon CSA was observed in OS followed by OE and OC, suggesting that adaptation to running exercise is loading intensity dependent. Achilles tendon stiffness was maintained in older groups, even though all older groups displayed larger tendon CSA and lower tendon Young's modulus. Shorter soleus muscle fascicles in OE runners may be an adaptation to life-long endurance running.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherAmerican Physiological Societyen_US
dc.relation.ispartofpagefrom63en_US
dc.relation.ispartofpageto69en_US
dc.relation.ispartofissue1en_US
dc.relation.ispartofjournalJournal of Applied Physiologyen_US
dc.relation.ispartofvolume120en_US
dc.subject.fieldofresearchBiological Sciencesen_US
dc.subject.fieldofresearchMedical and Health Sciencesen_US
dc.subject.fieldofresearchcode06en_US
dc.subject.fieldofresearchcode11en_US
dc.subject.keywordsScience & Technologyen_US
dc.subject.keywordsLife Sciences & Biomedicineen_US
dc.subject.keywordsPhysiologyen_US
dc.subject.keywordsSport Sciencesen_US
dc.subject.keywordsAchilles tendonen_US
dc.titleTriceps surae muscle-tendon properties in older endurance- and sprint-trained athletesen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dcterms.bibliographicCitationStenroth, L; Cronin, NJ; Peltonen, J; Korhonen, MT; Sipila, S; Finni, T, Triceps surae muscle-tendon properties in older endurance- and sprint-trained athletes, Journal of Applied Physiology, 2016, 120 (1), pp. 63-69en_US
dcterms.dateAccepted2015-10-19
dc.date.updated2021-06-28T23:19:54Z
gro.hasfulltextNo Full Text
gro.griffith.authorCronin, Neil


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