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.