Table 1. Results of VAS (visual analog scale for pain) from patients at the beginning of treatment (VAS pre), and six months after (four months after classes) (VAS post). Difference between VAS values (DVAS). Comparison between data pre-and post- treatment.

	VAS pre	VAS post	DVAS
Mean	60,2	57,6	-2,5
Standard deviation	3,3	3,5	4,2
Median	59,5	60	0
Standard deviation	20,6	21,6	26,2
Minimum	16	25	-51
Maximum	100	100	55
Number	38	38	38

Wilcoxon Test p= 0.3668