METHODS: A double-blind randomized clinical trial was conducted with 40 patients with chronic nonspecific low backPain. The patients were randomly allocated into two groups: the IFC treatment group (n = 20) and the placebo treatmentgroup (n = 20). The IFC group received 30 minutes of IFC treatment on the lumbar region, while the placebo groupreceived IFC treatment without real electrical stimulation. The intervention was administered five days a week for twoweeks
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