Table 3. Results of WOMAC from patients at the beginning of treatment (W pre), and six months after (four months after classes) (W post). Difference between WOMAC values (DW). Comparison between data pre- and post- treatment.

	W pre	W post	DW
Mean	46,7	43,2	-3,5
Standard deviation	3,08	2,87	3
Median	49,5	39,5	0,5
Standard deviation	19	17,7	18,8
Minimum	12	14	-51
Maximum	89	83	33
Number	38	38	38

Wilcoxon test P<0.0001