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Volume 11
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10.3390/sports11020022
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Article

Quadriceps Muscle Morphology Is an Important Determinant of Maximal Isometric and Crank Torques of Cyclists

by
Fábio Juner Lanferdini
1,*,
Fernando Diefenthaeler
2,
Andressa Germann Ávila
3,
Antônio Renato Pereira Moro
2,
Stephan van der Zwaard
4 and
Marco Aurélio Vaz
5
1
Biomechanics Laboratory, Center of Physical Education and Sports, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil
2
Biomechanics Laboratory, Center of Physical Education and Sports, Universidade Federal de Santa Catarina, Florianópolis 88040-900, SC, Brazil
3
Department of Production Engineering, Center of Technology Center, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil
4
Laboratory for Myology, Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, 1081 BT Amsterdam, The Netherlands
5
Exercise Research Laboratory, School of Physical Education, Physiotherapy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre 90690-200, RS, Brazil
*
Author to whom correspondence should be addressed.
Sports 2023, 11(2), 22; https://doi.org/10.3390/sports11020022
Submission received: 17 November 2022 / Revised: 26 December 2022 / Accepted: 30 December 2022 / Published: 18 January 2023
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Abstract

The aim of this study was to determine if quadriceps morphology [muscle volume (MV); cross-sectional area (CSA)], vastus lateralis (VL) muscle architecture, and muscle quality [echo intensity (ECHO)] can explain differences in knee extensor maximal voluntary isometric contraction (MVIC), crank torque (CT) and time-to-exhaustion (TTE) in trained cyclists. Twenty male competitive cyclists performed a maximal incremental ramp to determine their maximal power output (POMAX). Muscle morphology (MV; CSA), muscle architecture of VL and muscle quality (ECHO) of both quadriceps muscles were assessed. Subsequently, cyclists performed three MVICs of both knee extensor muscles and finally performed a TTE test at POMAX with CT measurement during TTE. Stepwise multiple regression results revealed right quadriceps MV determined right MVIC (31%) and CT (33%). Left MV determined CT (24%); and left VL fascicle length (VL-FL) determined MVIC (64%). However, quadriceps morphological variables do not explain differences in TTE. No significant differences were observed between left and right quadriceps muscle morphology (p > 0.05). The findings emphasize that quadriceps MV is an important determinant of knee extensor MVIC and CT but does not explain differences in TTE at POMAX. Furthermore, quadriceps morphological variables were similar between the left and right quadriceps in competitive cyclists.
Keywords: cyclists; performance predictors; maximal knee extensor torque; crank torque; quadriceps muscle properties cyclists; performance predictors; maximal knee extensor torque; crank torque; quadriceps muscle properties

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MDPI and ACS Style

Lanferdini, F.J.; Diefenthaeler, F.; Ávila, A.G.; Moro, A.R.P.; van der Zwaard, S.; Vaz, M.A. Quadriceps Muscle Morphology Is an Important Determinant of Maximal Isometric and Crank Torques of Cyclists. Sports 2023, 11, 22. https://doi.org/10.3390/sports11020022

AMA Style

Lanferdini FJ, Diefenthaeler F, Ávila AG, Moro ARP, van der Zwaard S, Vaz MA. Quadriceps Muscle Morphology Is an Important Determinant of Maximal Isometric and Crank Torques of Cyclists. Sports. 2023; 11(2):22. https://doi.org/10.3390/sports11020022

Chicago/Turabian Style

Lanferdini, Fábio Juner, Fernando Diefenthaeler, Andressa Germann Ávila, Antônio Renato Pereira Moro, Stephan van der Zwaard, and Marco Aurélio Vaz. 2023. "Quadriceps Muscle Morphology Is an Important Determinant of Maximal Isometric and Crank Torques of Cyclists" Sports 11, no. 2: 22. https://doi.org/10.3390/sports11020022

APA Style

Lanferdini, F. J., Diefenthaeler, F., Ávila, A. G., Moro, A. R. P., van der Zwaard, S., & Vaz, M. A. (2023). Quadriceps Muscle Morphology Is an Important Determinant of Maximal Isometric and Crank Torques of Cyclists. Sports, 11(2), 22. https://doi.org/10.3390/sports11020022

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