Comparison of linear, hyperbolic and double-hyperbolic models to assess the force-velocity relationship in multi-joint exercises

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 athlet...

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Bibliographic Details
Published in:	European journal of sport science 2021-03, Vol.21 (3), p.359-369
Main Authors:	Alcazar, Julian, Pareja-Blanco, Fernando, Rodriguez-Lopez, Carlos, Navarro-Cruz, Roberto, Cornejo-Daza, Pedro J., Ara, Ignacio, Alegre, Luis M.
Format:	Article
Language:	eng
Subjects:	biphasic force-velocity maximal unloaded velocity muscle mechanics muscle power Torque-velocity velocity-based training
Online Access:	Get full text
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Summary:	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. Muscle excitation was assessed by surface EMG recording of the quadriceps femoris, biceps femoris and gluteus maximus muscles during the unilateral LP. Linear, Hill's (hyperbolic) and Edman's (double-hyperbolic) equations were fitted to the measured F-V data and compared. Measured F-V data were best fitted by double-hyperbolic models in both exercises (p
ISSN:	1746-1391 1536-7290