Feasibility of the two-point method for assessing the force-velocity relationship during lower-body and upper-body isokinetic tests |
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Authors: | Danica Janicijevic Amador García-Ramos Olivera M Knezevic Dragan M Mirkov |
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Institution: | 1. Faculty of Sport and Physical Education, The Research Centre, University of Belgrade, Belgrade, Serbiajan.danica@gmail.com https://orcid.org/0000-0001-9925-7751;3. Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain;4. Department of Sports Sciences and Physical Conditioning, Faculty of Education, Catholic University of Most Holy Concepción, Concepción, Chile https://orcid.org/0000-0003-0608-8755;5. University of Belgrade Institute for Medical Research, Belgrade, Serbia https://orcid.org/0000-0001-8924-4420;6. Faculty of Sport and Physical Education, The Research Centre, University of Belgrade, Belgrade, Serbia https://orcid.org/0000-0002-2395-9500 |
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Abstract: | ABSTRACTThis study aimed to (1) evaluate the shape of the force-velocity (F-V) relationship obtained from different muscles, (2) explore the concurrent validity of the two-point method with respect to the multiple-point method, (3) evaluate whether the F-V relationship can discriminate between muscle groups and genders, and (4) explore the generalisability of the same F-V relationship parameters (maximal force F0], maximal velocity V0]), and maximal power P0]) between different tasks. The F-V relationship of 22 physically active participants (12 women) were tested during knee extension, knee flexion, elbow extension and elbow flexion through the multiple- (eight velocities: 30-60-90-120-150-180-210-240º/s) and two-point (two velocities: 60–180º/s) methods. The findings revealed (1) highly linear F-V relationships (r ≥ 0.893), (2) high concurrent validity of the two-point method for F0, but lower for V0 and P0, (3) the outcomes of both methods were sensitive to the muscle groups (higher for knee muscles) and gender (higher for men), and (4) the magnitude of the same F-V parameters were poorly correlated between different tasks (median r < 0.1). These results support the two-point method as a valid and sensitive procedure for determining the maximal capacities of the muscles to produce F, but not V, during isokinetic tests. |
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Keywords: | Muscle capacities validity sensitivity generalizability |
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