The study aims were to analyze the reliability and validity of the GymAware™ linear position transducer’s velocity and power measures during the sit-to-stand, compared with the Dartfish 2D videography analysis, and to assess the relationship of age and handgrip strength with velocity and power in 48 older men and women (77.6 ± 11.1 years). The results showed excellent agreement between GymAware- and Dartfish-derived sit-to-stand velocity (intraclass correlation coefficient2-1 = .94 and power intraclass correlation coefficient2-1 = .98) measures. A moderate and negative relationship was found between age and velocity (r = −.62; p < .001) and age and power (r = −.63; p < .001). A moderate and positive relationship was found between handgrip strength and velocity (r = .43; p = .002) and handgrip strength and power (r = .54; p < .001). The results show the GymAware velocity and power measures during the sit-to-stand in older adults to be reliable and valid.
Jennifer J. Sherwood, Cathy Inouye, Shannon L. Webb and Jenny O
Shannon O’Donnell, Christopher M. Beaven and Matthew Driller
GymAware linear position transducer for measuring counter-movement jump performance in female athletes . Meas Phys Educ Exerc Sci . 2017 ; 22 ( 1 ): 101 – 107 . doi:10.1080/1091367X.2017.1399892 10.1080/1091367X.2017.1399892 21. Dunn O . Multiple comparisons using rank sums . Technometrics . 1964 ; 6
Jonathon Weakley, Kevin Till, John Sampson, Harry Banyard, Cedric Leduc, Kyle Wilson, Greg Roe and Ben Jones
multijoint barbell resistance exercises. All repetitions of resistance training exercises were recorded with a GymAware linear position transducer (Kinetic Performance Technology, Canberra, Australia) that sampled at 50 Hz. The optical encoder, which was placed directly below the barbell during all movements