Sports performance enhancement and injury prevention have been recurrent topics of study during the last decade. However, the lack of biomechanical criteria for the analysis of the variables obtained by the GPS technologies implemented in high performance sports pose a serious risk for both athletes and clubs. The aim of this work is to evaluate the differences found in recorded speed between a gold standard technology (Xsens) and a commercial brand of GPS. The results show significant differences (p < 0.001) in both average and maximum speed between the two technologies, which calls for further research in this field. Therefore, training programming, performance analysis and the design of injury prevention strategies are compromised by the deficit in the veracity of the results obtained by this type of technology.
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