TY - JOUR

T1 - Accuracy of GPS devices for measuring high-intensity running in field-based team sports

AU - Rampinini, Ermanno

AU - Alberti, G

AU - Fiorenza, Matteo

AU - Riggio, M

AU - Sassi, R

AU - Borges, T O

AU - Coutts, A J

N1 - (Ekstern)

PY - 2015

Y1 - 2015

N2 - We compared the accuracy of 2 GPS systems with different sampling rates for the determination of distances covered at high-speed and metabolic power derived from a combination of running speed and acceleration. 8 participants performed 56 bouts of shuttle intermittent running wearing 2 portable GPS devices (SPI-Pro, GPS-5 Hz and MinimaxX, GPS-10 Hz). The GPS systems were compared with a radar system as a criterion measure. The variables investigated were: total distance (TD), high-speed distance (HSR > 4.17 m·s-1), very high-speed distance (VHSR > 5.56 m·s-1), mean power (Pmean), high metabolic power (HMP > 20 W·kg-1) and very high metabolic power (VHMP > 25 W·kg-1). GPS-5 Hz had low error for TD (2.8 %) and Pmean (4.5 %), while the errors for the other variables ranged from moderate to high (7.5-23.2 %). GPS-10 Hz demonstrated a low error for TD (1.9 %), HSR (4.7 %), Pmean (2.4 %) and HMP (4.5 %), whereas the errors for VHSR (10.5 %) and VHMP (6.2 %) were moderate. In general, GPS accuracy increased with a higher sampling rate, but decreased with increasing speed of movement. Both systems could be used for calculating TD and Pmean, but they cannot be used interchangeably. Only GPS-10 Hz demonstrated a sufficient level of accuracy for quantifying distance covered at higher speeds or time spent at very high power.

AB - We compared the accuracy of 2 GPS systems with different sampling rates for the determination of distances covered at high-speed and metabolic power derived from a combination of running speed and acceleration. 8 participants performed 56 bouts of shuttle intermittent running wearing 2 portable GPS devices (SPI-Pro, GPS-5 Hz and MinimaxX, GPS-10 Hz). The GPS systems were compared with a radar system as a criterion measure. The variables investigated were: total distance (TD), high-speed distance (HSR > 4.17 m·s-1), very high-speed distance (VHSR > 5.56 m·s-1), mean power (Pmean), high metabolic power (HMP > 20 W·kg-1) and very high metabolic power (VHMP > 25 W·kg-1). GPS-5 Hz had low error for TD (2.8 %) and Pmean (4.5 %), while the errors for the other variables ranged from moderate to high (7.5-23.2 %). GPS-10 Hz demonstrated a low error for TD (1.9 %), HSR (4.7 %), Pmean (2.4 %) and HMP (4.5 %), whereas the errors for VHSR (10.5 %) and VHMP (6.2 %) were moderate. In general, GPS accuracy increased with a higher sampling rate, but decreased with increasing speed of movement. Both systems could be used for calculating TD and Pmean, but they cannot be used interchangeably. Only GPS-10 Hz demonstrated a sufficient level of accuracy for quantifying distance covered at higher speeds or time spent at very high power.

KW - Acceleration

KW - Metabolic power

KW - Soccer

KW - Team sport

KW - Training load monitoring

UR - http://www.scopus.com/inward/record.url?scp=84920074899&partnerID=8YFLogxK

U2 - 10.1055/s-0034-1385866

DO - 10.1055/s-0034-1385866

M3 - Journal article

C2 - 25254901

AN - SCOPUS:84920074899

VL - 36

SP - 49

EP - 53

JO - International Journal of Sports Medicine

JF - International Journal of Sports Medicine

SN - 0172-4622

IS - 1

ER -