Assessment of the force-velocity relationship during vertical jumps: influence of the starting position, analysis procedures and number of loads
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Authors
Janićijević, Danica
Knežević, Olivera

Mirkov, Dragan M.

Perez-Castilla, Alejandro

Petrović, Miloš R.

Samozino, Pierre
Garcia-Ramos, Amador

Article (Published version)

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This study aimed to compare the reliability and magnitude of the force-velocity (F-V) relationship parameters between the squat jumps performed from the 90 degrees (SJ90) and self-preferred knee angle (SJ(pref)). A secondary aim was to explore the effect of the analysis procedure (force platform [FP] and Samozino's [SAM] method) and the number of loads tested (three- and two-point methods) on the F-V relationships. Twelve men were tested in two sessions during the SJ90 and SJ(pref). Two identical blocks of jumps were performed in each session against three external loads. The F-V relationship parameters (maximum force, maximum velocity, F-V slope and maximum power) were determined at each block through the FP and SAM procedures using the data collected under three (three-point method) or only the two most distant loads (two-point method). The average coefficient of variation (CV) of the four F-V parameters revealed a higher reliability for the SJ90 compared to the SJ(pref) (5.86% vs. 7....55%; CVratio = 1.29) with more pronounced differences using the FP (CVratio = 1.43) than the SAM procedure (CVratio = 1.14), and higher reliability for the SAM compared to the FP (6.14% vs. 7.27%; CVratio = 1.18). The SJ(pref) and SAM procedures provided comparable or higher magnitude of the F-V relationship parameters than the SJ90 and FP, respectively. The three- and two-point methods revealed a comparable reliability and trivial differences in the magnitude of the F-V relationship parameters. The routine testing procedure of the F-V relationship could be simplified using the SJ(pref), the SAM procedure and the two-point method.
Keywords:
Force platform / Samozino's method / multiple-point method / two-point methodSource:
European Journal of Sport Science, 2020, 20, 5, 614-623Publisher:
- Taylor & Francis Ltd, Abingdon
Funding / projects:
- University of Granada under a post-doctoral grant (perfeccionamiento de doctores)
- FPU15/03649
- Muscular and Neural Factors of Human Locomotion and their Adaptation (RS-175037)
- Noninvasive modulation of cortical excitability and plasticity - Noninvasive neuromodulation of the CNS in the study of physiological mechanisms, diagnosis and treatment (RS-175012)
Note:
- Peer-reviewed manuscript: http://rimi.imi.bg.ac.rs/handle/123456789/1128
DOI: 10.1080/17461391.2019.1645886
ISSN: 1746-1391
PubMed: 31314671
WoS: 000480202200001
Scopus: 2-s2.0-85070293986
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Institut za medicinska istraživanjaTY - JOUR AU - Janićijević, Danica AU - Knežević, Olivera AU - Mirkov, Dragan M. AU - Perez-Castilla, Alejandro AU - Petrović, Miloš R. AU - Samozino, Pierre AU - Garcia-Ramos, Amador PY - 2020 UR - http://rimi.imi.bg.ac.rs/handle/123456789/1020 AB - This study aimed to compare the reliability and magnitude of the force-velocity (F-V) relationship parameters between the squat jumps performed from the 90 degrees (SJ90) and self-preferred knee angle (SJ(pref)). A secondary aim was to explore the effect of the analysis procedure (force platform [FP] and Samozino's [SAM] method) and the number of loads tested (three- and two-point methods) on the F-V relationships. Twelve men were tested in two sessions during the SJ90 and SJ(pref). Two identical blocks of jumps were performed in each session against three external loads. The F-V relationship parameters (maximum force, maximum velocity, F-V slope and maximum power) were determined at each block through the FP and SAM procedures using the data collected under three (three-point method) or only the two most distant loads (two-point method). The average coefficient of variation (CV) of the four F-V parameters revealed a higher reliability for the SJ90 compared to the SJ(pref) (5.86% vs. 7.55%; CVratio = 1.29) with more pronounced differences using the FP (CVratio = 1.43) than the SAM procedure (CVratio = 1.14), and higher reliability for the SAM compared to the FP (6.14% vs. 7.27%; CVratio = 1.18). The SJ(pref) and SAM procedures provided comparable or higher magnitude of the F-V relationship parameters than the SJ90 and FP, respectively. The three- and two-point methods revealed a comparable reliability and trivial differences in the magnitude of the F-V relationship parameters. The routine testing procedure of the F-V relationship could be simplified using the SJ(pref), the SAM procedure and the two-point method. PB - Taylor & Francis Ltd, Abingdon T2 - European Journal of Sport Science T1 - Assessment of the force-velocity relationship during vertical jumps: influence of the starting position, analysis procedures and number of loads EP - 623 IS - 5 SP - 614 VL - 20 DO - 10.1080/17461391.2019.1645886 ER -
@article{ author = "Janićijević, Danica and Knežević, Olivera and Mirkov, Dragan M. and Perez-Castilla, Alejandro and Petrović, Miloš R. and Samozino, Pierre and Garcia-Ramos, Amador", year = "2020", abstract = "This study aimed to compare the reliability and magnitude of the force-velocity (F-V) relationship parameters between the squat jumps performed from the 90 degrees (SJ90) and self-preferred knee angle (SJ(pref)). A secondary aim was to explore the effect of the analysis procedure (force platform [FP] and Samozino's [SAM] method) and the number of loads tested (three- and two-point methods) on the F-V relationships. Twelve men were tested in two sessions during the SJ90 and SJ(pref). Two identical blocks of jumps were performed in each session against three external loads. The F-V relationship parameters (maximum force, maximum velocity, F-V slope and maximum power) were determined at each block through the FP and SAM procedures using the data collected under three (three-point method) or only the two most distant loads (two-point method). The average coefficient of variation (CV) of the four F-V parameters revealed a higher reliability for the SJ90 compared to the SJ(pref) (5.86% vs. 7.55%; CVratio = 1.29) with more pronounced differences using the FP (CVratio = 1.43) than the SAM procedure (CVratio = 1.14), and higher reliability for the SAM compared to the FP (6.14% vs. 7.27%; CVratio = 1.18). The SJ(pref) and SAM procedures provided comparable or higher magnitude of the F-V relationship parameters than the SJ90 and FP, respectively. The three- and two-point methods revealed a comparable reliability and trivial differences in the magnitude of the F-V relationship parameters. The routine testing procedure of the F-V relationship could be simplified using the SJ(pref), the SAM procedure and the two-point method.", publisher = "Taylor & Francis Ltd, Abingdon", journal = "European Journal of Sport Science", title = "Assessment of the force-velocity relationship during vertical jumps: influence of the starting position, analysis procedures and number of loads", pages = "623-614", number = "5", volume = "20", doi = "10.1080/17461391.2019.1645886" }
Janićijević, D., Knežević, O., Mirkov, D. M., Perez-Castilla, A., Petrović, M. R., Samozino, P.,& Garcia-Ramos, A.. (2020). Assessment of the force-velocity relationship during vertical jumps: influence of the starting position, analysis procedures and number of loads. in European Journal of Sport Science Taylor & Francis Ltd, Abingdon., 20(5), 614-623. https://doi.org/10.1080/17461391.2019.1645886
Janićijević D, Knežević O, Mirkov DM, Perez-Castilla A, Petrović MR, Samozino P, Garcia-Ramos A. Assessment of the force-velocity relationship during vertical jumps: influence of the starting position, analysis procedures and number of loads. in European Journal of Sport Science. 2020;20(5):614-623. doi:10.1080/17461391.2019.1645886 .
Janićijević, Danica, Knežević, Olivera, Mirkov, Dragan M., Perez-Castilla, Alejandro, Petrović, Miloš R., Samozino, Pierre, Garcia-Ramos, Amador, "Assessment of the force-velocity relationship during vertical jumps: influence of the starting position, analysis procedures and number of loads" in European Journal of Sport Science, 20, no. 5 (2020):614-623, https://doi.org/10.1080/17461391.2019.1645886 . .