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Summary of mean normalized integrated surface EMG during the PRE phase for: A) the unsupported (ULR) and B) the supported (SLR leg raising tasks. In the left panel, white bars represent the control group, while black represent the age-, sex-matched subgroup of persons with LBP prior to receiving treatment. In the right panel, grey and striped bars represent change in EMG amplitude the STB or MSI groups, respectively.
