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Comparison of linear, hyperbolic and double-hyperbolic models to assess the force-velocity relationship in multi-joint exercises.
Eur J Sport Sci
March 2021
GENUD Toledo Research Group, Universidad de Castilla-La Mancha, Toledo, Spain.
This study assessed the validity of linear, hyperbolic and double-hyperbolic models to fit measured force-velocity (F-V) data in multi-joint exercises and the influence of muscle excitation on the F-V relationship. The force-joint angle and F-V relationships were assessed in 10 cross-training athletes and 14 recreationally resistance-trained subjects in the unilateral leg press (LP) and bilateral bench press (BP) exercises, respectively. A force plate and a linear encoder were installed to register external force and velocity, respectively.
View Article and Find Full Text PDFOn the Shape of the Force-Velocity Relationship in Skeletal Muscles: The Linear, the Hyperbolic, and the Double-Hyperbolic.
Front Physiol
June 2019
GENUD Toledo Research Group, Universidad de Castilla-La Mancha, Toledo, Spain.
The shape of the force-velocity (F-V) relationship has important implications for different aspects of muscle physiology, such as muscle efficiency and fatigue, the understanding of the pathophysiology of several myopathies or the mechanisms of muscle contraction , and may be of relevance for other fields, such as the development of robotics and prosthetic applications featuring natural muscle-like properties. However, different opinions regarding the shape of the F-V relationship and the underlying mechanisms exist in the literature. In this review, we summarize relevant evidence on the shape of the F-V relationship obtained over the last century.
View Article and Find Full Text PDFThe double-hyperbolic force-velocity relationship in humans.
Acta Physiol (Oxf)
August 2019
GENUD Toledo Research Group, Universidad de Castilla-La Mancha, Toledo, Spain.
Remarks on muscle contraction mechanism II. Isometric tension transient and isotonic velocity transient.
Int J Mol Sci
January 2015
Osaka University, 1-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.
Mitsui and Ohshima (2008) criticized the power-stroke model for muscle contraction and proposed a new model. In the new model, about 41% of the myosin heads are bound to actin filaments, and each bound head forms a complex MA(3) with three actin molecules A1, A2 and A3 forming the crossbridge. The complex translates along the actin filament cooperating with each other.
View Article and Find Full Text PDFThe biphasic force-velocity relationship in whole rat skeletal muscle in situ.
J Appl Physiol (1985)
June 2007
Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada T2N 1N4.
Edman has reported that the force-velocity relationship (FVR) departs from Hill's classic hyperbola near 0.80 of measured isometric force (J Physiol 404: 301-321, 1988). The purpose of this study was to investigate the biphasic nature of the FVR in the rested state and after some recovery from fatigue in the rat medial gastrocnemius muscle in situ.
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