The validity and reliability of a 5-hz gps device for quantifying athletes’ sprints and movement demands specific to team sports
- Alejandro Muñoz López 1
- Paulino Granero Gil
- José Pino Ortega 2
- Moisés de Hoyo Lora
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1
Universidad Pablo de Olavide
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2
Universidad de Murcia
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ISSN: 1988-5202
Año de publicación: 2017
Volumen: 12
Número: 1
Páginas: 156-166
Tipo: Artículo
Otras publicaciones en: Journal of Human Sport and Exercise: JHSE
Resumen
GPS systems are commonly used to analysis football performance during either trainings or matches. While many studies have investigated the validity and reliability of these devices, there is a lack of objective procedures regarding synchronization with gold standards such as real distance or timing gates. The objective of this study was to study the validity and reliability of a 5Hz GPS system (WIMU) during 10m and 30m sprints and during team sports specific movements and the reliability during very high speeds (> 30 km/h). The TD BIAS for Circuit A, 10m sprint and 30m sprint were -2.73 ± 1.64 m (p < 0.001), -0.80 ± 0.58 m (p<0.001) and 0.42 ± 2.50 m (p=0.515) respectively. Average ICC for GPS speed point-to-point were 0.976 ± 0.012 and 0.991± 0.003 for Circuit B and Motorized Sprints, respectively. The average BIAS compared with each unit mean laps (intra-unit reliability) results for TD, Peak-Speed and Avg-Speed were 0.00 ± 1.68, 0.00 ± 1.73 and 0.00 ± 0.33 for Circuit A, 0.00 ± 0.49, 0.00 ± 0.53 and 0.00 ± 0.77 for 10m sprints and 0.00 ± 2.34, 0.00 ± 0.76 and 0.00 ± 0.74 for 30m sprints, non-significant difference in all cases. In conclusion, despite a lower than recommended sample frequency, the WIMU GPS showed to be valid and reliable for measuring sprints at speed higher than 20 km· h-1, as well as for team sport movements. This might be practical on daily physical demands testing during training sessions
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