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Journal article
Agreement between common linear position transducers measuring mean and peak velocities during a belt squat
Isokinetics and exercise science, Vol.online ahead of print(4)
05/21/2025
Web of Science ID: WOS:001604618800004
Abstract
Background:
Resistance training with real-time movement velocity feedback enhances power training. Linear position transducers (LPTs) provide visual biofeedback and are commonly used to measure movement velocities in performance and research settings. However, the agreement between some commonly used LPTs, such as the Humac360, is unknown.
Objective:
The purpose of this study was to determine the agreement of the Humac360 LPT between the Tendo Power Analyzer and the GymAware PowerTool.
Methods:
Thirty participants (23.0 ± 5.6 years) completed 7 sets of 3 repetitions of the belt squat movement with loads ranging from 0–120% of their body weight. Mean velocity (MV) and peak velocity (PV) were collected and recorded simultaneously on all three LPTs. Agreement between devices was assessed using the ratio of half the limits of agreement and the mean of pairwise measurements, and the correlation between devices was determined using Pearson's r.
Results:
Moderate agreement was seen at PV between the Humac360 and Tendo (0.5 LOA/MPM = 0.12–0.21), and between the Humac360 and GymAware (0.5 LOA/MPM = 0.16–0.27). Low agreement was observed when measuring MV between the Humac360 and Tendo (0.5 LOA/MPM = 0.23–0.31), and between the Humac360 and GymAware (0.5 LOA/MPM = 0.18–0.27). High to very high correlations were observed between the Humac360 and both the Tendo (r = 0.87–0.99) and GymAware (r = 0.87–0.96) at MV and PV.
Conclusion:
The moderate agreement and high to very high positive correlations demonstrated by the Humac360 was comparable to the Tendo and GymAware devices, specifically at peak velocities, supporting its use by clinicians, therapists, and trainers, for the particular use of measuring peak velocity.
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Details
- Title
- Agreement between common linear position transducers measuring mean and peak velocities during a belt squat
- Publication Details
- Isokinetics and exercise science, Vol.online ahead of print(4)
- Resource Type
- Journal article
- Publisher
- SAGE PUBLICATIONS INC
- Number of pages
- 6
- Copyright
- © The Author(s) 2025.
- Identifiers
- WOS:001604618800004; 99381363956106600
- Academic Unit
- Biology; Hal Marcus College of Science and Engineering
- Language
- English