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Figure 5: VAS before and after exercise according to Oxy-Hb increase during lumbar extension in the flexion-provoked LBP. The Oxy-Hb increased group in the flexion-provoked LBP (n=17, 56.7%) significantly improved compared with the non-Oxy-Hb increased group (n=13, 43.3%). (p<0.05) |