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The effect of transcutaneous electrical nerve stimulation (TENS) on pain and impression of change was assessed during a 2.5\u2010hour intervention on the first postoperative days following hip surgery in a randomized, single\u2010blinded, placebo\u2010controlled trial involving 30 patients. <jats:italic>Methods<\/jats:italic>. Mixed\u2010frequency TENS (2\u2009Hz\/80\u2009Hz) was administered using specially designed pants integrating modular textile electrodes to facilitate stimulation both at rest and during activity. The treatment outcome was assessed by self\u2010reported pain Numerical Rating Scale (NRS) and Patient Global Impression of Change (PGIC) scores at four time points. The ability to perform a 3\u2010meter walk test and the use of analgesics were also evaluated. Group comparison and repeated\u2010measure analysis were carried out using nonparametric statistics. <jats:italic>Results<\/jats:italic>. The active TENS group exhibited significantly higher PGIC scores after 30\u2009minutes, which persisted throughout the intervention (all <jats:italic>p<\/jats:italic> \u2264 0.001). A reduction in NRS appeared after one hour of active TENS, persisting throughout the intervention (all <jats:italic>p<\/jats:italic> \u2264 0.05). The median group differences in pain ratings were greater than the minimum clinically important difference, and the analysis of pain trajectories confirmed clinical significance at the individual level. Moreover, patients in the active TENS group were more likely able to perform a 3\u2010meter walk test by the end of the intervention (<jats:italic>p<\/jats:italic> = 0.04). Analysis of the opioid\u2010sparing effect of TENS was inconclusive (<jats:italic>p<\/jats:italic> = 0.066). No postoperative surgical complications or TENS\u2010related side effects were observed during the study. <jats:italic>Conclusion<\/jats:italic>. Mixed\u2010frequency TENS integrated in pants could potentially be an interesting addition to the arsenal of treatments for multimodal analgesia following hip surgery. 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