Pedro Tomas Gomez-Piriz

Publications (1)1.83 Total impact

• Article: Reliability and Comparability of the Accelerometer and the Linear Position Measuring Device in Resistance Training.

  Pedro Tomas Gomez-Piriz, Eva Trigo Sanchez, David Cabello Manrique, Esther Puga Gonzalez
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  ABSTRACT: The purpose of this study was to determine the inter-machine reliability attained from devices used to measure the common variables in sports performance. Repeatability conditions were established by creating a similar set of conditions under which the measurements were taken from both devices. OBJECTIVES:: To demonstrate the reliability between two devices in a bench press movement: the linear position measuring device (LPM) isoinertial dynamometer (TForce) and 2; the 3-D (Myotest) accelerometer (AC). To compare the existing correlations between maximum velocity, maximum estimated strength and peak power estimate variables in the bench press exercise. METHOD:: 40 bench press exercise trials were analysed simultaneously, performed by three different subjects (age: 26.74 ± 1.2 years, height: 175.74 ± 4.04 cm, weight: 78.7 ± 3.35 kg) at maximum velocity (25 kg additional load). STATISTICAL ANALYSES:: Three simple linear regression models were developed, supplied by the linear position measuring device (LPM) on the basis of the accelerometer's (AC) data. The assumption of independence of errors was compared by means of the Durban-Watson test and partial autocorrelation coefficients were established at an overall p<0.05 significance level. RESULTS:: It has not been possible to confirm the presence of a general correlation between the measurements of both devices. Regarding the assumption of independence of errors, the presence of generalised autocorrelation was confirmed. Linear regression analysis revealed an inter-machine correlation in one of the nonconclusive cases, (Peak Power) variable and subject 1, r(10) = 0.640, p = 0.024. No partial autocorrelation was found. PRACTICAL APPLICATIONS:: The devices should not be used interchangeably as instruments to assess and monitor resistance training. The AC device revealed higher and more disperse values than the LPM device.
  The Journal of Strength and Conditioning Research 07/2012; · 1.83 Impact Factor