Figure 2: SF-36 before and after exercise (n=57). Significant improvement was found at 4 weeks in the extension-provoked LBP in PF (p=0.003), RP (p<0.0001), BP (p=0.0017) compared with the flexion-provoked LBP. Physical Functioning (PF), Role Physical (RP), Bodily Pain (BP), General Health (GH)