Trunk stability assesment using an inertial device (WIMU)

The purpose of this research was to perform a trunk strength assessment of protocols described in the literature using accelerometry, by means of CV and ApEn entropy calculations. In addition, to check differences in CV and ApEn variables depending on the type of exercise, as a secondary objective. Twenty-four male subjects who were part of a football team participating in the Third Division:

  •  Age: 23,4 ± 2,73 years
  • Height: 1,75 ± 0,09 cm
  • Weight: 74,3 ± 6,19 kg
  • -BMI (Body mass index): 21,51 ± 3,47 kg/m2)

This data was recorded by means of an inertial device located in the center of mass (L3) and their accelerometric signals were analyzed by two statistics: coefficient of variation (CV) and approximate entropy (ApEn).

Significant differences were found in the value of CV and ApEn in all exercises except between PP and PL in ApEn (p <0.05). The data were distributed in low, medium and high values of CV and ApEn of the participants. A trunk strength-stability assessment using an inertial device or multi-sensors is proposed as a practical method for strength and conditioning coaches. Also, the application of the statistics CV and ApEn for the analysis of signals in stability exercises is recommended.

infographics by José María Oliva