title: Comparison of the force-, velocity-, and power-time curves recorded with a force plate and a linear velocity transducer.
abstract: This study aimed to correlate, compare, and determine the reliability of force, velocity, and power values collected with a force plate (FP) and a linear transducer during loaded jumps. Twenty-three swimmers performed an incremental loading test at 25, 50, 75, and 100% of their own body weight on a FP. A linear velocity transducer (LVT) was attached to the bar to assess the peak and the mean values of force, velocity, and power. Both the peak variables (r = 0.94 - 0.99 for peak force, r = 0.83 - 0.91 for peak velocity, and r = 0.90-0.94 for peak power; p < 0.001) and the mean variables (r = 0.96-0.99 for mean force, r = 0.87-0.89 for mean velocity, and r = 0.93-0.96 for mean power; p < 0.001) were strongly correlated between both measurement tools. Differences in the shape of the force-, velocity-, and power-time curves were observed. The LVT data showed a steeper increase in these variables at the beginning of the movement, while the FP recorded larger values in the latter part. Peak values were more reliable than mean values. These results suggest that the LVT is a valid tool for the assessment of loaded squat jump.
authors.affiliation: a Department of Physical Education and Sport , University of Granada , Granada , Spain.
authors.forename: Amador
authors.initials: A
authors.lastname: García-Ramos
authors.affiliation: b Faculty of sport , University of Ljubljana , Ljubljana , Slovenia.
authors.forename: Igor
authors.initials: I
authors.lastname: Stirn
authors.affiliation: b Faculty of sport , University of Ljubljana , Ljubljana , Slovenia.
authors.forename: Vojko
authors.initials: V
authors.lastname: Strojnik
authors.affiliation: a Department of Physical Education and Sport , University of Granada , Granada , Spain.
authors.forename: Paulino
authors.initials: P
authors.lastname: Padial
authors.affiliation: c High performance Center of Sierra Nevada , Spanish Sport Council , Granada , Spain.
authors.forename: Blanca
authors.initials: B
authors.lastname: De la Fuente
authors.affiliation: c High performance Center of Sierra Nevada , Spanish Sport Council , Granada , Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Argüelles-Cienfuegos
authors.affiliation: a Department of Physical Education and Sport , University of Granada , Granada , Spain.
authors.forename: Belén
authors.initials: B
authors.lastname: Feriche
mesh_terms: D000293:Adolescent; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D035002:Lower Extremity / Q000502:physiology*; D053580:Muscle Strength / Q000502:physiology*; D059385:Plyometric Exercise / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D055070:Resistance Training / Q000295:instrumentation* / Q000379:methods; D014159:Transducers; D016474:Weight-Bearing
keywords: Smith machine; System centre of mass; kinematic; kinetic; loaded squat jump