Table 2. RMSE results.
LPS | GPS | VID | ANOVA | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Median | ±SD | Median | ±SD | Median | ±SD | p | ES | Sign. diff. groups | ||
dRMSE (m) | Sport-specific course (SSC) | 0.27 | 0.05 | 0.88 | 0.22 | 0.57 | 0.09 | *** | large | ALL |
Shuttle run (SHU) | 0.22 | 0.13 | 1.33 | 0.54 | 0.59 | 0.28 | *** | large | ALL | |
Small-sided game (SSG) | 0.23 | 0.05 | 0.81 | 0.41 | 0.56 | 0.12 | *** | large | ALL | |
vRMSE (m⋅s-1) | Sport-specific course (SSC) | 0.35 | 0.06 | 0.32 | 0.01 | 0.41 | 0.07 | ** | large | GPS&VID / LPS&VID |
Shuttle run (SHU) | 0.31 | 0.04 | 0.39 | 0.08 | 0.52 | 0.08 | *** | large | GPS&VID / LPS&VID | |
Small-sided game (SSG) | 0.36 | 0.06 | 0.39 | 0.06 | 0.47 | 0.08 | *** | large | GPS&VID / LPS&VID | |
Standing (pooled) | 0.34 | 0.17 | 0.18 | 0.20 | 0.23 | 0.26 | *** | medium | GPS&LPS / VID&LPS | |
Low speed (pooled) | 0.26 | 0.07 | 0.26 | 0.13 | 0.33 | 0.12 | *** | medium | GPS&VID / LPS&VID | |
Moderate speed (pooled) | 0.25 | 0.07 | 0.27 | 0.07 | 0.43 | 0.10 | *** | large | GPS&VID / LPS&VID | |
Elevated speed (pooled) | 0.34 | 0.12 | 0.37 | 0.19 | 0.49 | 0.24 | *** | small | GPS&VID / LPS&VID | |
High speed (pooled) | 0.39 | 0.13 | 0.37 | 0.25 | 0.50 | 0.30 | ||||
Very high speed (pooled) | 0.37 | 0.12 | 0.39 | 0.13 | 0.61 | 0.43 | * | medium | GPS&VID / LPS&VID | |
aRMSE (m⋅s-2) | Sport-specific course (SSC) | 0.69 | 0.16 | 1.18 | 0.14 | 0.78 | 0.16 | *** | large | GPS&LPS / GPS&VID |
Shuttle run (SHU) | 0.58 | 0.10 | 0.56 | 0.17 | 0.80 | 0.15 | *** | large | GPS&VID / LPS&VID | |
Small-sided game (SSG) | 0.69 | 0.13 | 0.69 | 0.14 | 0.97 | 0.19 | *** | large | GPS&VID / LPS&VID |
Presented as median ± standard deviation (SD). Inter-system differences in accuracy levels were tested using repeated-measures one-way analysis of variance (ANOVA). p values are presented as * (p ≤ 0.05), ** (p ≤ 0.01) and *** (p ≤ 0.001). η2 effect sizes (ES) for the analysis of variance were classified as small (0.02–0.12), medium (0.13–0.25) and large (>0.26). Homogeneous subsets are listed if Bonferroni’s post hoc analysis did not result in significant difference between individual groups. GPS = Global Positioning System; LPS = Local Positioning System, VID = video system; dRMSE = distance root mean square error; vRMSE = velocity root mean square error; aRMSE = acceleration root mean square error.