Table 3. Validity and reliability of the GPS-system for each movement and the complete session including stationary phases.
Exercise Distance Bias (%) Distance SEE (% [CL]) Within-device distance TE (m [CL]) Within-device distance CV (% [CL])
Sideways 2.4 4.9 [3.8; 6.9] 3.2 [2.0; 7.1] 7.3 [4.7; 16.2]
Diagonal -1.0 5.6 [4.2; 8.6] 3.6 [2.2; 8.7] 8.8 [5.5; 21.6]
Acceleration -4.0 5.4 [4.3; 7.4] 2.8 [1.9; 5.3] 8.6 [5.8; 16.6]
Deceleration 0.0 4.3 [3.4; 6.0] 1.7 [1.2; 3.3] 4.9 [3.3; 9.4]
Backwards -8.0 6.0 [4.6; 8.6] 3.4 [2.2; 7.6] 10.9 [7.0; 24.1]
Shuttle 2.5 3.4 [2.7; 4.6] 2.7 [1.9; 4.7] 4.6 [3.2; 8.1]
Skipping -3.1 8.6 [6.6; 12.1] 5.4 [3.6; 11.0] 17.4 [11.5; 35.4]
Session 0.8 3.1 [2.2; 5.8] 6.7 [3.8; 25.1] 2.0 [1.2; 7.6]
SEE = standard error of the estimate; CL = 95% confidence limits; TE = typical error; CV = coefficient of variation.