The validity and between-unit variability of GNSS units (STATSports Apex 10 and 18 Hz) for measuring distance and peak speed in team sports

Marco Beato, Giuseppe Coratella, Adam Stiff, Antonio Dello Iacono

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Abstract

The aims of this study were (i) to investigate the criterion validity (vs. gold standard measurements) of the 10 and 18 Hz STATSports Apex units for measuring distances and peak speed (Vpeak) outcomes; (ii) to investigate the between-unit variability. Twenty university students were enrolled in the study (age 21 ± 2 years, weight 72 ± 6 kg, height 1.76 ± 0.05 m). The criterion validity was tested by comparing the distances recorded by the units with ground truth reference (400-m trial, 128.5-m circuit and 20-m trial). Vpeak values were compared with those determined by a gold standard criterion device (Stalker ATS Radar Gun) during a linear 20-m sprint. The distance biases for the Apex 10 Hz in the 400-m trial, 128.5-m circuit and 20-m trial were 1.05 ± 0.87%, 2.3 ± 1.1%, and 1.11 ± 0.99%, respectively, while for the Apex 18 Hz the biases were 1.17 ± 0.73%, 2.11 ± 1.06%, and 1.15 ± 1.23%, respectively. Vpeak measured by the Apex 10 Hz and Apex 18 Hz were 26.5 ± 2.3 km.h-1 and 26.5 ± 2.6 km.h-1, respectively, with the criterion method reporting 26.3 ± 2.4. km.h-1, with a bias of 2.36 ± 1.67% and 2.02 ± 1.24%, respectively. This study is the first to validate and compare the STATSports Apex 10 Hz and 18 Hz. Between-analysis (t-test) for total distance and Vpeak reported non-significant differences. Apex units reported a small error of around 1-2% compared to the criterion distances during 400-m, 128.5-m circuit, 20-m trials and Vpeak. In conclusion, both units could be used with confidence to measure these variables during training and match play.
Original languageEnglish
Article number1288
Number of pages8
JournalFrontiers in Physiology
DOIs
Publication statusPublished - 21 Sep 2018

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Firearms
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Weights and Measures
Equipment and Supplies

Keywords

  • training
  • soccer (football)
  • team sports
  • velocity
  • GPS - global positioning system

Cite this

@article{4223e21169844c4cb4d5c76ac9337e48,
title = "The validity and between-unit variability of GNSS units (STATSports Apex 10 and 18 Hz) for measuring distance and peak speed in team sports",
abstract = "The aims of this study were (i) to investigate the criterion validity (vs. gold standard measurements) of the 10 and 18 Hz STATSports Apex units for measuring distances and peak speed (Vpeak) outcomes; (ii) to investigate the between-unit variability. Twenty university students were enrolled in the study (age 21 ± 2 years, weight 72 ± 6 kg, height 1.76 ± 0.05 m). The criterion validity was tested by comparing the distances recorded by the units with ground truth reference (400-m trial, 128.5-m circuit and 20-m trial). Vpeak values were compared with those determined by a gold standard criterion device (Stalker ATS Radar Gun) during a linear 20-m sprint. The distance biases for the Apex 10 Hz in the 400-m trial, 128.5-m circuit and 20-m trial were 1.05 ± 0.87{\%}, 2.3 ± 1.1{\%}, and 1.11 ± 0.99{\%}, respectively, while for the Apex 18 Hz the biases were 1.17 ± 0.73{\%}, 2.11 ± 1.06{\%}, and 1.15 ± 1.23{\%}, respectively. Vpeak measured by the Apex 10 Hz and Apex 18 Hz were 26.5 ± 2.3 km.h-1 and 26.5 ± 2.6 km.h-1, respectively, with the criterion method reporting 26.3 ± 2.4. km.h-1, with a bias of 2.36 ± 1.67{\%} and 2.02 ± 1.24{\%}, respectively. This study is the first to validate and compare the STATSports Apex 10 Hz and 18 Hz. Between-analysis (t-test) for total distance and Vpeak reported non-significant differences. Apex units reported a small error of around 1-2{\%} compared to the criterion distances during 400-m, 128.5-m circuit, 20-m trials and Vpeak. In conclusion, both units could be used with confidence to measure these variables during training and match play.",
keywords = "training, soccer (football), team sports, velocity, GPS - global positioning system",
author = "Marco Beato and Giuseppe Coratella and Adam Stiff and {Dello Iacono}, Antonio",
year = "2018",
month = "9",
day = "21",
doi = "10.3389/fphys.2018.01288",
language = "English",
journal = "Frontiers in Physiology",
issn = "1664-042X",
publisher = "Frontiers Media",

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TY - JOUR

T1 - The validity and between-unit variability of GNSS units (STATSports Apex 10 and 18 Hz) for measuring distance and peak speed in team sports

AU - Beato, Marco

AU - Coratella, Giuseppe

AU - Stiff, Adam

AU - Dello Iacono, Antonio

PY - 2018/9/21

Y1 - 2018/9/21

N2 - The aims of this study were (i) to investigate the criterion validity (vs. gold standard measurements) of the 10 and 18 Hz STATSports Apex units for measuring distances and peak speed (Vpeak) outcomes; (ii) to investigate the between-unit variability. Twenty university students were enrolled in the study (age 21 ± 2 years, weight 72 ± 6 kg, height 1.76 ± 0.05 m). The criterion validity was tested by comparing the distances recorded by the units with ground truth reference (400-m trial, 128.5-m circuit and 20-m trial). Vpeak values were compared with those determined by a gold standard criterion device (Stalker ATS Radar Gun) during a linear 20-m sprint. The distance biases for the Apex 10 Hz in the 400-m trial, 128.5-m circuit and 20-m trial were 1.05 ± 0.87%, 2.3 ± 1.1%, and 1.11 ± 0.99%, respectively, while for the Apex 18 Hz the biases were 1.17 ± 0.73%, 2.11 ± 1.06%, and 1.15 ± 1.23%, respectively. Vpeak measured by the Apex 10 Hz and Apex 18 Hz were 26.5 ± 2.3 km.h-1 and 26.5 ± 2.6 km.h-1, respectively, with the criterion method reporting 26.3 ± 2.4. km.h-1, with a bias of 2.36 ± 1.67% and 2.02 ± 1.24%, respectively. This study is the first to validate and compare the STATSports Apex 10 Hz and 18 Hz. Between-analysis (t-test) for total distance and Vpeak reported non-significant differences. Apex units reported a small error of around 1-2% compared to the criterion distances during 400-m, 128.5-m circuit, 20-m trials and Vpeak. In conclusion, both units could be used with confidence to measure these variables during training and match play.

AB - The aims of this study were (i) to investigate the criterion validity (vs. gold standard measurements) of the 10 and 18 Hz STATSports Apex units for measuring distances and peak speed (Vpeak) outcomes; (ii) to investigate the between-unit variability. Twenty university students were enrolled in the study (age 21 ± 2 years, weight 72 ± 6 kg, height 1.76 ± 0.05 m). The criterion validity was tested by comparing the distances recorded by the units with ground truth reference (400-m trial, 128.5-m circuit and 20-m trial). Vpeak values were compared with those determined by a gold standard criterion device (Stalker ATS Radar Gun) during a linear 20-m sprint. The distance biases for the Apex 10 Hz in the 400-m trial, 128.5-m circuit and 20-m trial were 1.05 ± 0.87%, 2.3 ± 1.1%, and 1.11 ± 0.99%, respectively, while for the Apex 18 Hz the biases were 1.17 ± 0.73%, 2.11 ± 1.06%, and 1.15 ± 1.23%, respectively. Vpeak measured by the Apex 10 Hz and Apex 18 Hz were 26.5 ± 2.3 km.h-1 and 26.5 ± 2.6 km.h-1, respectively, with the criterion method reporting 26.3 ± 2.4. km.h-1, with a bias of 2.36 ± 1.67% and 2.02 ± 1.24%, respectively. This study is the first to validate and compare the STATSports Apex 10 Hz and 18 Hz. Between-analysis (t-test) for total distance and Vpeak reported non-significant differences. Apex units reported a small error of around 1-2% compared to the criterion distances during 400-m, 128.5-m circuit, 20-m trials and Vpeak. In conclusion, both units could be used with confidence to measure these variables during training and match play.

KW - training

KW - soccer (football)

KW - team sports

KW - velocity

KW - GPS - global positioning system

U2 - 10.3389/fphys.2018.01288

DO - 10.3389/fphys.2018.01288

M3 - Article

JO - Frontiers in Physiology

JF - Frontiers in Physiology

SN - 1664-042X

M1 - 1288

ER -