CONCURRENT VALIDITY AND RELIABILITY OF THE GYMAWARE RS LINEAR POSITION TRANSDUCER DURING FREE-WEIGHTBENCH PRESS
31st Annual Congress of the EUROPEAN COLLEGE OF SPORT SCIENCE, Lausanne, İsviçre, 7 - 10 Temmuz 2026, ss.780, (Özet Bildiri)
- Yayın Türü: Bildiri / Özet Bildiri
- Basıldığı Şehir: Lausanne
- Basıldığı Ülke: İsviçre
- Sayfa Sayıları: ss.780
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Atatürk Üniversitesi Adresli: Evet
Özet
: Linear position transducers are widely used in velocity-based resistance training to quantify barbell kine-matics and estimate derived kinetic variables. Although previous research has evaluated earlier GymAware models, themeasurement properties of the newly released GymAware RS across various resistance-training conditions, includingfree-weight exercises, have not yet been independently examined, which may raise questions about its applicability indiverse practical settings. METHODS: Eighteen resistance-trained males performed free-weight bench press repetitions at40%, 60%, and 80% of one repetition maximum across two sessions. Mean velocity, peak velocity, mean force, peakforce, mean power, and peak power were simultaneously recorded using GymAware RS and a three-dimensional motioncapture system (Qualisys). Device-by-load effects were evaluated using linear mixed models. Agreement was quantifiedusing intraclass correlation coefficients, coefficient of variation, and Bland–Altman analysis to assess systematic and pro-portional bias. Within- and between-session reliability of the GymAware RS was determined using intraclass correlationcoefficients and coefficient of variation. RESULTS: Mean velocity showed no significant differences between devices at anyload and demonstrated excellent agreement with low measurement error. Mean force differed between systems at 40%of one repetition maximum but not at 60% or 80%. Mean power exhibited systematic differences at 40% and 60%, withsmaller discrepancies at 80%. Peak force differences were load-dependent and most evident at 60%. Proportional biaswas observed for mean velocity (small), mean power, and peak force, indicating magnitude-dependent differences.Agreement was excellent for velocity, good to excellent for mean force, and moderate to good for power and peak forcevariables. These differences highlight the importance of understanding each system's measurement principles wheninterpreting kinetic data for practical applications. CONCLUSION: The GymAware RS provides highly accurate and reliablemeasurements of barbell velocity during the free-weight bench press across moderate to high loads. Differences ob-served in force and power variables were systematic and load-dependent rather than random. These findings likely re-flect fundamental differences in measurement principles between linear position transducers and three-dimensionalmotion capture systems, which serve as reference methods. Velocity outputs appear directly applicable for monitoringand prescription purposes in velocity-based resistance training. In contrast, derived kinetic variables should be interpretedwithin the context of the specific measurement system used, as outputs from different technologies may not be directlyinterchangeable. Overall, the GymAware RS appears well-suited for applied monitoring in free-weight resistance exercise.