Table 4.

Indicators of variability and symmetry of defensive movements in athletes of various levels

Indicator	National level	International level	p-value	Cohen’s d	95% CI for mean difference
Coefficient of variation of CM movement (%)	12.7 ± 3.1	8.9 ± 2.4	0.002	-1.36	−5.9 to − 1.7
Coefficient of variation of angular velocity (%)	15.2 ± 4.7	11.1 ± 3.3	0.013	-1.00	−7.2 to − 1.0
Kinematic symmetry index (%)	78.5 ± 6.8	89.2 ± 5.6	< 0.001	1.71	5.9 to 15.5
Symmetry fluctuation between repetitions (%)	11.4 ± 3.9	6.7 ± 2.5	0.004	-1.41	−7.2 to − 2.2

Cohen’s d is calculated as (international − national)/SDpooled; positive values indicate higher values in the international group. The 95% confidence interval refers to the mean difference between groups (international − national)

Source: compiled by the authors