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2015 | 49 | 1 | 25-35
Tytuł artykułu

Multilevel Models for the Analysis of Angle-Specific Torque Curves with Application to Master Athletes

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The aim of this paper was to outline a multilevel modeling approach to fit individual angle-specific torque curves describing concentric knee extension and flexion isokinetic muscular actions in Master athletes. The potential of the analytical approach to examine between individual differences across the angle-specific torque curves was illustrated including between-individuals variation due to gender differences at a higher level. Torques in concentric muscular actions of knee extension and knee extension at 60°·s-1 were considered within a range of motion between 5°and 85° (only torques “truly” isokinetic). Multilevel time series models with autoregressive covariance structures with standard multilevel models were superior fits compared with standard multilevel models for repeated measures to fit anglespecific torque curves. Third and fourth order polynomial models were the best fits to describe angle-specific torque curves of isokinetic knee flexion and extension concentric actions, respectively. The fixed exponents allow interpretations for initial acceleration, the angle at peak torque and the decrement of torque after peak torque. Also, the multilevel models were flexible to illustrate the influence of gender differences on the shape of torque throughout the range of motion and in the shape of the curves. The presented multilevel regression models may afford a general framework to examine angle-specific moment curves by isokinetic dynamometry, and add to the understanding mechanisms of strength development, particularly the force-length relationship, both related to performance and injury prevention.
Wydawca
Rocznik
Tom
49
Numer
1
Strony
25-35
Opis fizyczny
Daty
wydano
2015-12-01
zaakceptowano
2015-12-01
online
2015-12-30
Twórcy
  • School of Physical Education, University of Campinas, Campinas, Avenida Érico Veríssimo, 70113083-851 Campinas, São Paulo, Brazil , hmoreiracarvalho@gmail.com
  • Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
Bibliografia
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  • Pincivero DM, Salfetnikov Y, Campy RM, Coelho AJ. Angle- and gender-specific quadriceps femoris muscle recruitment and knee extensor torque. Journal of biomechanics, 2004; 37: 1689-1697[Crossref]
  • Pinheiro JC, Bates DM. Mixed-effects models with Sand and S-plus. Springer New York; 2000
  • Prasartwuth O, Allen TJ, Butler JE, Gandevia SC, Taylor JL. Length-dependent changes in voluntary activation, maximum voluntary torque and twitch responses after eccentric damage in humans. The Journal of physiology, 2006; 571: 243-252
  • Rowland T. It's about time. Pediatric exercise science, 2011; 23: 1-2
  • Singer JD, Willett JB. Applied longitudinal data analysis : modeling change and event occurrence. Oxford University Press, Oxford; New York, 644; 2003
  • Steele F. Multilevel models for longitudinal data. Journal of the Royal Statistical Society: Series A (Statistics in Society), 2008; 171: 5-19
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_1515_hukin-2015-0105
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