Article
Validity of Wireless Device Measuring Velocity of Resistance Exercises
Journal of Trainology
(2015)
Abstract
Objectives: The purpose of the study was to identify the level of accuracy in velocity measurement from a newly developed inertia sensor. Design and Methods: Five subjects performed two dumbbell exercises for total of four sets of ten repetitions with a light intensity. Velocity data were taken and considered for analysis from two devices; the inertia sensor, wirelessly connected via Bluetooth™ to a smartphone, and a motion capture system. Both data were taken at the sampling frequency of 200 Hz. Identical data sets of peak and average velocity were analyzed with Pearson product-moment zero-order correlation using total 200 data points (5 subjects, 4 sets, and 10 repetitions) on both exercises with p value of 0.05. Data were also analyzed using the same statistical procedure for left and right side to ensure the device-device data consistency. Results: Results showed high correlations in both exercises between the two velocity measurement methods (0.80 - 0.92), indicating the accuracy of the data from the inertia sensor is supportive. Left and right side correlations were also high from the inertia sensor (0.90 - 0.93) indicating that the data were similar with relatively identical movements between the two limbs. Conclusions: With the accuracy of the velocity measurement, this would potentially replace currently used, wired devices to accommodate user-friendly, accessible to more exercises to measure velocity.
Keywords
- wireless sensor,
- resistance training,
- measurement
Disciplines
Publication Date
2015
DOI
10.17338/trainology.4.1_15
Citation Information
Kimitake Sato, George K. Beckham, Kevin Carroll, Caleb Bazyler, et al.. "Validity of Wireless Device Measuring Velocity of Resistance Exercises" Journal of Trainology Vol. 4 Iss. 1 (2015) p. 15 - 18 Available at: http://works.bepress.com/george-beckham/3/