Validity and reliability of velocity and power measures provided by the Vitruve linear position transducer

Santiago A Ruiz-Alias, Deniz Şentürk, Zeki Akyildiz, Onat Çetin, Selman Kaya, Alejandro Pérez-Castilla and Ivan Jukic

PLOS ONE, 2024, vol. 19, issue 10, 1-14

Abstract: This study aimed to determine the validity and between-day reliability of the mean velocity (MV), peak velocity (PV), mean power (MP), and peak power (PP) provided by the Vitruve linear position transducer at different submaximal loads in the free-weight and Smith machine back squat using GymAware as a reference point. Fourteen male sports science students (free-weight back squat one-repetition maximum [1RM]: 132.5 ± 28.5 kg, Smith machine back squat 1RM: 163.9 ± 30.4 kg) performed six experimental sessions, twice per week with 72 hours of rest. The first two included the assessment of the 1RM of both exercises. In the four remaining, both linear position transducers were simultaneously used to record MV, PV, MP, PP of each repetition during an incremental load test (i.e., 20, 40, 60, 80, 90% 1RM) with three minutes of rest between sets. Vitruve displayed both fixed and proportional bias for certain relative loads across all variables. Vitruve did not meet the validity criteria for all (MV, PP) or at least two (MP, PV) relative loads (Coefficient of variation [CV] > 10%; Pearson correlation 0.60). MV, PV, MP, and PP recorded by Vitruve displayed acceptable reliability (CV

Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0312348

DOI: 10.1371/journal.pone.0312348

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