Postural control in top-level female volleyball players

Table 1 Median and quartiles of COP parameters for both groups and the corresponding Mann-Whitney U independent tests used to compare differences between students and athletes

	Group	N	Median	Quartiles	W statistic	p	r effect size
AP
SD	students	31	3.64	2.90–4.29	365.0	0.105	−0.207
SD	athletes	31	3.12	2.63–3.78	365.0	0.105	−0.207
RA	students	31	20.18	16.05–23.83	199.5	< .001	−0.503
RA	athletes	31	15.51	12.81–17.03	199.5	< .001	−0.503
MV	students	31	6.71	5.29–8.99	450.0	0.673	−0.055
MV	athletes	31	6.51	5.96–7.63	450.0	0.673	−0.055
CF	students	31	0.30	0.22–0.40	377.0	0.150	0.177
CF	athletes	31	0.35	0.30–0.41	377.0	0.150	0.177
FD	students	31	1.46	1.37–1.57	246.5	0.001	0.422
FD	athletes	31	1.56	1.52–1.64	246.5	0.001	0.422
PF	students	31	0.56	0.52–0.67	407.0	0.304	0.131
PF	athletes	31	0.61	0.54–0.70	407.0	0.304	0.131
ML
SD	students	31	2.88	2.15–3.43	361.0	0.094	−0.213
SD	athletes	31	2.43	1.92–3.08	361.0	0.094	−0.213
RA	students	31	16.06	13.10–21-05	250.5	0.001	−0.413
RA	athletes	31	11.85	9.30–15.77	250.5	0.001	−0.413
MV	students	31	6.77	5.27–7.53	407.0	0.306	−0.131
MV	athletes	31	6.41	4.80–7.17	407.0	0.306	−0.131
CF	students	31	0.39	0.32–0.47	450.0	0.672	0.058
CF	athletes	31	0.40	0.36–0.43	450.0	0.672	0.058
FD	students	31	1.52	1.46–1.59	248.5	0.001	0.419
FD	athletes	31	1.64	1.56–1.67	248.5	0.001	0.419
PF	students	31	0.68	0.59–0.76	286.0	0.006	0.345
PF	athletes	31	0.78	0.67–0.90	286.0	0.006	0.345

SD Standard deviation of COP, RA A range of COP, MV Mean speed of COP, CF COP frequency, FD Fractal dimension, PF Peak frequency of COP-COM, AP Anterior-posterior plane, ML Medial-lateral plane, N Number of participants, W statistic of Mann-Whitney U independent test, r effect size - Z value from the test divided by the total number of observations

ISSN: 2052-1847