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; TiEMGCBPO: total iEMG of core body muscles during push-off; TiEMGLLPO: total iEMG of lower limbs during push-off.