Table 4. Summary of SPM1D results for PC1 to PC6 during the two phases of the instep kick.
| Phase |
PC |
Peak t |
Critical
threshold |
Cluster
extent (%) |
p |
Hedges’
g |
Significant
window (%) |
| Phase
1 |
PC1 |
-0.96 |
4.23 |
0 |
- |
- |
- |
| PC2 |
2.30 |
5.46 |
0 |
- |
- |
- |
| PC3 |
7.62 |
5.41 |
21 |
<
0.001 |
2.96 |
54%-75% |
| PC4 |
1.74 |
4.90 |
0 |
- |
- |
- |
| PC5 |
2.56 |
4.80 |
0 |
- |
- |
- |
| PC6 |
-2.94 |
4.71 |
0 |
- |
- |
- |
| Phase
2 |
PC1 |
-9.88 |
5.88 |
9 |
<
0.001 |
-2.03 |
60%-70% |
| PC2 |
-1.99 |
7.19 |
0 |
- |
- |
- |
| PC3 |
-4.71 |
5.49 |
0 |
- |
- |
- |
| PC4 |
2.51 |
5.01 |
0 |
- |
- |
- |
| PC5 |
-1.70 |
4.83 |
0 |
- |
- |
- |
| PC6 |
1.19 |
4.96 |
0 |
- |
- |
- |
SPM1D independent samples t tests were used to compare PC score trajectories between elite and amateur players. Peak t represents the maximum value of the observed SPM t trajectory. Significant window indicates the normalized time interval where the observed t trajectory exceeded the critical threshold. Adjusted p values were calculated using Bonferroni correction across the 12 PC phase comparisons. Hedges’ g was calculated from participant level mean PC scores within each significant cluster. Negative peak t and Hedges’ g values indicate higher scores in the amateur group. For PCs without suprathreshold clusters, cluster extent was set to 0, whereas cluster-level p values, Hedges’ g, and significant windows are indicated by “—”.
