The reproducibility of the 1hz gps in the aciclic displacement with intermittent intensity

Abstract

<jats:p>Objective: the aim of this study was to verify the reproducibility index of the frequency meter with GPS technology with recording speed of 1Hz in acyclic displacement and intermittent intensity, performed by soccer referees. Materials and methods: it was characterized by a field study with a quantitative trait involving 14 men, aged 20.42 ± 2.78 years, from a barracks in the city of Rio de Janeiro. Polar heart rate monitor with 1Hz GPS model V800 was used. The protocol used was adapted from the FIFA test protocol for soccer referees, so that 10 "shots" of 75m in 15s were accomplished by 25m in 20 of recovery. Testing and retest were applied with 7 days interval and identical protocols: heating, ambiance (4 "shots" following the model of the protocol above) and then the test. Since the circuit covered in the test protocol was 1000 m.Results: a mean of 1002.5 ± 17.12 m was obtained in the test and in the test 1010.83± 32.88 m, the coefficients of variation were respectively 1% and 3%. The difference wasnot significant between the test and the retest (P-value&gt; 0.05), and the intraclasscorrelation coefficient indicated a moderate association between the measures.Conclusion: therefore, it is suggested that it is acceptable to use a frequency gauge with a recording speed of 1Hz to monitor displacements of soccer referees in acyclic displacement and intermittent intensity.</jats:p>