Validation of the Aquanex system to assess in-water forces during aquatic exercise

Catarina Santos; Mário Costa; Daniel Almeida; Nuno Garrido; Tiago Barbosa; Sérgio  Rosa

doi:10.6063/motricidade.33520

Validation of the Aquanex system to assess in-water forces during aquatic exercise

Authors

Catarina C. Santos University of Beira Interior, CIDESD https://orcid.org/0000-0003-4592-8091
Mário J. Costa University of Porto, CIFI2D https://orcid.org/0000-0001-5502-1202
Daniel A. Marinho University of Beira Interior, CIDESD
Nuno D. Garrido University of Trás-os-Montes and Alto Douro, CIDESD https://orcid.org/0000-0002-8105-7580
Tiago M. Barbosa Polytechnic Institute of Bragança https://orcid.org/0000-0001-7071-2116
Sérgio Rosa Polytechnic Institute of Bragança https://orcid.org/0000-0002-8528-5142

DOI:

https://doi.org/10.6063/motricidade.33520

Keywords:

Swimming, pressure sensors, resultant force, methods, device, kinetics

Abstract

The aim of this study was to perform a validation of the Aquanex system to assess in-water forces during aquatic exercise. One sensor (Type A) that composes the differential pressure system (Aquanex v.4.1, STR, USA) was placed inside a wind tunnel (Axial Propellor Fan, England), this last being considered as the gold standard technique for measurement. A frequency inverter was used to control a range of twenty-two frequencies. The mean force (F_MEAN, N) acting on the sensor and in the wind tunnel model was measured. The validation criteria were defined as follows: (i) p>0.05 in a paired t-test; (ii) R²≥0.49 in a simple linear regression model; and (iii) at least 80 % of the plots within the limits of agreement in the Bland-Altman plots. The results showed no differences between both methods (p=0.884). A significant relationship with a high effect (R²=0.573, p<0.001) was found, as well as a small bias (0.002 N) between the two methods. Thus, the Aquanex system seems to be valid for assessing the in-water forces as it meets all the validation criteria.

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Published

2024-09-30

How to Cite

Santos, C., Costa, M., Almeida, D., Garrido, N., Barbosa, T., & Rosa, S. . (2024). Validation of the Aquanex system to assess in-water forces during aquatic exercise. Motricidade, 20(3), 193–196. https://doi.org/10.6063/motricidade.33520

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Issue

Vol. 20 No. 3 (2024): Motricidade

Section

Research Note

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