Table 5. Correlation coefficients between the total integrated electromyography (TiEMG) and selected kinematics variables in the rotation and push-off phase of each studied backstroke-to-breaststroke turning technique.
| Turns |
Statistical analysis values |
Rotation phase |
Push-off phase |
|
TiEMG CBRO (%) |
TiEMG LLRO (%) |
|
TiEMG CBPO (%) |
TiEMG LLPO (%) |
Push-off time (s) |
Tuck index |
| Open |
Spearman rho |
Rotation time (s) |
-0.11 |
0.20 |
Final push-off velocity (m/s) |
0.08 |
-0.23 |
0.01 |
0.32 |
| p-value |
0.60 |
0.46 |
0.78 |
0.40 |
0.98 |
0.22 |
| Somersault |
Spearman rho |
-0.18 |
-0.27 |
-0.50 |
0.20 |
0.33 |
-0.32 |
| p-value |
0.51 |
0.31 |
0.04* |
0.66 |
0.22 |
0.23 |
| Bucket |
Spearman rho |
0.33 |
-0.01 |
-0.30 |
0.16 |
-0.03 |
0.15 |
| p-value |
0.21 |
0.99 |
0.26 |
0.56 |
0.92 |
0.59 |
| Crossover |
Spearman rho |
-0.19 |
-0.20 |
0.18 |
-0.19 |
-0.01 |
-0.14 |
| p-value |
0.47 |
0.45 |
0.50 |
0.49 |
0.98 |
0.60 |
TiEMG
CBRO: total iEMG of core body muscles during rotation; TiEMG
LLRO: total iEMG of lower limbs during rotation; TiEMG
CBPO: total iEMG of core body muscles during push-off; TiEMG
LLPO: total iEMG of lower limbs during push-off.* significant at p < 0.05.
