Table 4.

description pf pain during the 8 weeks

Variable	stage	group	Mean ± standard deviation	Intragroup changes		Intergroup changes
				t	P	F	P
pain	Pre test (W0*)	combined	7.2±1.6	12.85 (W0 and W8)	0.001	3.06(W0 and W8)	0.094
		Core stability	7.4±0.9	9.2 (W0 and W8)	0.001
	First week (W1*)	combined	3.3±2.3	6.82 (W0 and W1)	0.001	3.31 (W0 and W1)	0.082
		Core stability	5.3±2.1	3.95 (W0 and W1)	0.002
	second week (W2*)	combined	5.2±2.3	1.68 (W1 and W2)	0.121	11.93 (W1 and W2)	0.002
		Core stability	4.1±2.1	2.42 (W1 and W2)	0.032
	third week (W3*)	combined	3.2±1.4	-2.34 (W2 and W3)	0.039	3.61 (W2 and W3)	0.07
		Core stability	3.0±1.6	2.74 (W2 and W3)	0.018
	forth week (W4*)	combined	1.8±1.1	2.93(W3 and W4)	0.014	0.71 (W3 and W4)	0.408
		Core stability	2.8±1.2	0.47(W3 and W4)	0.650
	Eighth week (W8*)	combined	1.6±1.5	1.39 (W4 and W8)	0.191	5.02(W4 and W8)	0.035
		Core stability	3.1±1.7	-1.48 (W4 and W8)	0.165

* Abbreviation for each step or week.