The accuracy of measuring velocity during weightlifting movements with five velocity-based training devices.

This article focuses on evaluating the accuracy of five velocity-based training (VBT) devices in measuring peak concentric barbell velocity during the snatch and clean weightlifting movements, using a 12-camera motion capture system as the gold standard. The devices tested included three linear position transducers (GymAware RS, Vitruve, GravityBox), one laser optic array (GymAware FLEX), and one video-based mobile app (WL Analysis). Results showed that the GymAware RS was the most accurate device, exhibiting no fixed or proportional bias, while the other devices consistently underestimated peak velocity, which could affect training load prescriptions. The study highlights the tradeoff between device cost and measurement accuracy, recommending practitioners consider these factors when implementing VBT in weightlifting training.