Validity and reliability of the Myotest Pro® wireless accelerometer

Bampouras, Theodoros, Relph, Nicola, Orme, Duncan and Esformes, Joseph (2010) Validity and reliability of the Myotest Pro® wireless accelerometer. In: Second International Sports Science and Sports Medicine Conference, 19-21 August 2010, Newcastle upon Tyne, UK. (Unpublished)

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Abstract

Assessing strength and power is crucial for evaluating muscular performance and function. As laboratory testing can be time-consuming or inaccessible to many athletes, portable accelerometers have been developed to assess strength and power on the field. Recently, a wireless accelerometer was introduced to allow for even greater flexibility in assessment. Nevertheless, any assessment tool must be valid and reliable. The aim of the current study was to assess the validity and reliability of a commercially available accelerometer. Forty-eight physically active subjects (males, n=32: age 29.2±8.8 yrs, height 1.79±0.12 m, body mass 82.0±14.3 kg; females, n=16: age 27.4±6.3 yrs, height 1.71±0.06 m, body mass 63.8±7.4 kg) completed two countermovement jump squats on a force plate (FP) with at least one minute rest, on two separate occasions. The accelerometer was secured on a lightweight bar, which rested on the subjects’ shoulders whilst jumping. The jump with the highest force generation was selected from each occasion for further analysis. Validity was determined from the Pearson correlation coefficient (r) between the accelerometer and the FP. Bias was also calculated, using a t-test. Reliability was assessed by the intraclass correlation coefficient (ICC) and coefficient of variation (CV), whilst test-retest differences were examined with a t-test. The accelerometer demonstrated significant and high correlation to the force plate (p=0.001, r=0.85), whilst it overestimated force production by 7.8% (p=0.001). Repeatability for both devices was the same (ICC=0.87), with small CV (accelerometer=7.5%, FP=6.1%) and test-retest differences (accelerometer=0.1%, FP=1.1%). The results indicate that the Myotest Pro® accelerometer is a valid and reliable tool for assessing force in the field. However, caution needs to be exercised when the results are compared to data obtained from a force plate, as the Myotest Pro® calculation method overestimates the maximum force produced.

Item Type: Conference or Workshop Item (Paper)
Departments: Sports and Physical Activity
Additional Information: This abstract was published in British Journal of Sports Medicine, 44 (14), i20, 2010.
Depositing User: Anna Lupton
Date Deposited: 10 May 2018 14:50
Last Modified: 17 Jul 2018 18:26
URI: http://insight.cumbria.ac.uk/id/eprint/3808

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