Validity and Reliability of the PUSH Wearable Device to Measure Velocity and Power During Loaded Countermovement Jumps
The PUSH wearable wireless device has recently been designed specifically for resistance training to provide kinematic and kinetic feedback. Similar technologies already exist but can be limited to certain exercises by the wire connection. Both wired and wireless technologies provide immediate feedback of movement velocity and power during performance, but a wireless device may be seen as more useful in a training environment. Currently, only two studies have determined the validity and reliability of the PUSH band against both 3D motion analysis during the dumbbell (DB) curl and DB shoulder press (2) and a linear position transducer (LPT) during a smith machine back squat (1). The PUSH band demonstrated high levels of validity when compared with 3D motion analysis during the DB curl and DB press for both peak and average velocity (2). During the squat, high reliability was found for both average and peak velocity. High associations were also found between the PUSH band and LPT for both peak (r = 0.91) and average (r = 0.86) velocity, but the values derived for peak and average velocity were significantly lower ( p < 0.05) and higher ( p < 0.01), respectively, for the PUSH device (1).
