Isokinetic knee strength as a predictor of cardiorespiratory responses during loaded aerobic capacity test in elite athletes

Basit Öğe Kaydı
dc.authorid0000-0002-5255-4860
dc.authorid0000-0002-5488-3158
dc.contributor.authorCar, Bekir
dc.contributor.authorKurtoglu, Ahmet
dc.contributor.authorAtar, Ozdemir
dc.contributor.authorTurkmen, Musa
dc.contributor.authorEken, Ozgur
dc.contributor.authorSoyler, Mehmet
dc.contributor.authorAldhahi, Monira I.
dc.date.accessioned2026-02-03T12:02:29Z
dc.date.available2026-02-03T12:02:29Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis study aimed to investigate the predictive capacity of knee isokinetic strength parameters on cardiorespiratory responses during aerobic capacity test (ACT). It provides novel insights into the interplay between muscular strength and cardiorespiratory function through comparative analyses of loaded and unloaded ACT protocols in elite athletes. Thirty elite modern pentathlon athletes (age: 21.43 +/- 0.77 years) underwent isokinetic knee strength assessments at angular velocities of 60 degrees/s and 240 degrees/s. Cardiorespiratory parameters-average breath volume (ABV), average breath frequency (ABF), auxiliary oxygen density (AOD), and heart rate (HR)-were recorded during the Bruce Protocol conducted under two conditions: unloaded and with a 10 kg loaded vest. Relationships between isokinetic strength metrics and cardiorespiratory parameters were analyzed using linear regression models. There were no significant differences in ABV, ABF, or AOD between loaded and unloaded ACT conditions (p > .05). However, HR was significantly lower during loaded ACT (p < .05). Linear regression revealed that at 60 degrees/s, several knee strength parameters, including peak torque extension (PT-EXT), peak torque flexion (PT-FLX), total work flexion (TW-FLX), average power flexion (AP-FLX), and agonist strength (AGANT), significantly predicted ABV during loaded ACT (R-2 = 0.804, p = .004). A similar pattern was observed at 240 degrees/s, where comparable predictors explained a significant variance in ABV (R-2 = 0.761, p = .012). No significant predictive relationships were identified during unloaded ACT. Isokinetic knee strength parameters significantly predict cardiorespiratory responses during loaded ACT but not during unloaded protocols. These findings suggest that isokinetic strength assessments may be a valuable tool for optimizing ACT prescription and monitoring training adaptations in elite athletes.
dc.description.sponsorshipPrincess Nourah bint Abdulrahman University [PNURSP2025R286]
dc.description.sponsorshipPrincess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
dc.description.sponsorshipWe would like to thank Princess Nourah bint Abdulrahman University for supporting this project through Princess Nourah bint Abdulrahman University Researchers Supporting Project number (PNURSP2025R286), Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia.
dc.identifier.doi10.1038/s41598-025-11429-5
dc.identifier.issn2045-2322
dc.identifier.issue1
dc.identifier.pmid40676099
dc.identifier.scopus2-s2.0-105011041429
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1038/s41598-025-11429-5
dc.identifier.urihttps://hdl.handle.net/20.500.12428/34779
dc.identifier.volume15
dc.identifier.wosWOS:001531692900035
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherNature Portfolio
dc.relation.ispartofScientific Reports
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20260130
dc.subjectKnee isokinetic strength
dc.subjectACT
dc.subjectCardiorespiratory fitness
dc.subjectMuscle performance
dc.subjectloaded exercise
dc.titleIsokinetic knee strength as a predictor of cardiorespiratory responses during loaded aerobic capacity test in elite athletes
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
PubMed İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu