Validity and reliability of force-velocity outcome parameters in flywheel squats.

Journal of Biomechanics
Darjan SpudićNejc Šarabon

Abstract

Our study was designed to check the reliability of force-velocity (F-v) relationship outcome measures using flywheel (FW) squats. The main objectives at the primary level were to test intra-session reliability of mechanical parameters for ten equidistant FW loads, and at the secondary level, to test reliability and validity of the F-v relationship outcome measures in case any possible reduction in used loads and number of loads - compared to the 10-load method as a reference - is administered. Twenty-six subjects performed two sets of five squats with FW loads in the range 0.025-0.25 kg∙m2. Averaging six consecutive repetitions obtained ICC2.k > 0.9 for mean force and mean velocity results. Consecutively averaged parameters at the primary level showed excellent inter-set reliability (ICC2.1 > 0.9). The inverse F-v relationship was strong (R2 = 0.96). At the secondary level, Bland-Altman statistics showed decreasing bias and limits of agreement in combination with more loads. Theoretical maximal force and power showed smaller bias as F-v slope and theoretical maximal velocity for three loads or more. Four loads (0.025, 0.075, 0.225 and 0.25 kg∙m2) lowered bias to a 5% in relation to the reference F-v slope. In conclusion, six re...Continue Reading

Citations

Dec 19, 2020·Journal of Sports Sciences·Stuart A McErlain-Naylor, Marco Beato
Apr 4, 2021·International Journal of Environmental Research and Public Health·Darjan SpudićNejc Šarabon
Apr 20, 2021·Journal of Biomechanics·Alejandro Muñoz-LópezPablo Floria
Jan 18, 2022·European Journal of Applied Physiology·R ArmstrongT D O'Brien

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