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Your search keyword '"Two-point method"' showing total 2 results
Start Over Descriptor "Two-point method" Publisher taylor & francis ltd, abingdon
2 results on '"Two-point method"'

1. Assessment of the force-velocity relationship during vertical jumps: influence of the starting position, analysis procedures and number of loads

Author

Janićijević, Danica, Janićijević, Danica, Knežević, Olivera, Mirkov, Dragan M., Perez-Castilla, Alejandro, Petrović, Miloš R., Samozino, Pierre, Garcia-Ramos, Amador, Janićijević, Danica, Janićijević, Danica, Knežević, Olivera, Mirkov, Dragan M., Perez-Castilla, Alejandro, Petrović, Miloš R., Samozino, Pierre, and Garcia-Ramos, Amador

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.

Published
2020

2. Assessment of the force-velocity relationship during vertical jumps: influence of the starting position, analysis procedures and number of loads

Author

Milos Petrovic, Danica Janicijevic, Dragan M. Mirkov, Amador García-Ramos, Olivera M. Knezevic, Alejandro Pérez-Castilla, and Pierre Samozino

Subjects
Adult, Male, Knee Joint, two-point method, Samozino's method, Magnitude (mathematics), 030209 endocrinology & metabolism, Physical Therapy, Sports Therapy and Rehabilitation, Squat, Plyometric Exercise, Weight-Bearing, 03 medical and health sciences, Young Adult, 0302 clinical medicine, Two point method, Humans, Orthopedics and Sports Medicine, Force platform, Range of Motion, Articular, Reliability (statistics), Mathematics, Cross-Over Studies, business.industry, Reproducibility of Results, 030229 sport sciences, General Medicine, Structural engineering, multiple-point method, Biomechanical Phenomena, Position analysis, business, Force velocity
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. This is the peer-reviewed version of the article: Janićijević, D.; Knežević, O.; Mirkov, D. M.; Perez-Castilla, A.; Petrović, M. R.; 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. European Journal of Sport Science 2020, 20 (5), 614–623. [https://doi.org/10.1080/17461391.2019.1645886]

Published
2020

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