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Int J Sports Med 2016; 37(05): 374-381
DOI: 10.1055/s-0035-1565137
Orthopedics & Biomechanics
© Georg Thieme Verlag KG Stuttgart · New York

Validation of Instrumented Insoles for Measuring Height in Vertical Jump

F. Martínez-Martí
1   ECsens, CITIC-UGR, Department of Electronics and Computer Technology, University of Granada, Granada, Spain
,
J. L. González-Montesinos
2   Department of Physical Education, School of Science, University of Cádiz, Puerto Real, Spain
,
D. P. Morales
1   ECsens, CITIC-UGR, Department of Electronics and Computer Technology, University of Granada, Granada, Spain
,
J. R. F. Santos
2   Department of Physical Education, School of Science, University of Cádiz, Puerto Real, Spain
,
J. Castro-Piñero
2   Department of Physical Education, School of Science, University of Cádiz, Puerto Real, Spain
,
M. A. Carvajal
1   ECsens, CITIC-UGR, Department of Electronics and Computer Technology, University of Granada, Granada, Spain
,
A. J. Palma
1   ECsens, CITIC-UGR, Department of Electronics and Computer Technology, University of Granada, Granada, Spain
› Author Affiliations
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Publication History



accepted after revision 10 June 2015

Publication Date:
08 February 2016 (online)

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Abstract

The purpose of this study was to validate a new instrumented insole called ECnsole for measuring flight time during vertical jump performance. 66 participants performed 3 different jump tests (squat jump, countermovement jump and Abalakov jump) twice with flight times determined using an instrumented insole composed of 4 pressure sensors (PreECnsole) and an accelerometer sensor (AccECnsole), a laser platform (Sport Jump System Pro), and a high-speed motion capture system (HSC); the latter 2 systems are considered as reference methods. One-way analysis of variance (ANOVA), simple linear regression, and the Bland-Altman method were used to assess validity. Regardless of the jump test performed, the ECnsole system showed a systematic bias close to 0 and a low random error (average random error: ±2.8 cm; ±3.1 cm PreECnsole and AccECnsole vs. HSC system respectively and ± 2.3 cm; ±2.9 cm PreECnsole and AccECnsole vs. SJS system respectively). The associations between PreECnsole and AccECnsole with the HSC were very high (R2=0.967 and 0.958 respectively). Furthermore, the associations between PreECnsole and AccECnsole with the SJS were very high (R2=0.978 and 0.966 respectively) as well. Therefore, the ECnsole system can be considered an alternative method for measuring jump height during vertical jump performance.

Key words

biomechanics - insoles - vertical jump - force sensors - accelerometer
 

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