Table 2.

Relevant multiple regression results including R2, standardized regression coefficient and associated t, P values for control and low back pain (LBP) groups after the first and second exercise sets.

	Group	R2	Standardized Regression coefficient (b)	t	P-value
First Set	Control	0.18	0.43 *	2.22	0.04
	LBP history	0.22	0.46 †	2.45	0.02
Second Set	Control	0.07	‡	‡	‡
	LBP history	0.21	0.46 §	2.37	0.03

*Standardized regression coefficient for ∆Q_MedF

† Standardized regression coefficient for ∆_MedF

‡ No predictor significantly explained variance in QI

§ Standardized regression coefficient for ∆H_MedF