Purpose: This study was designed to determine the effects of pre-warming on core body temperature (CBT) and hemodynamics from the inductionof spinal anesthesia until 30 min postoperatively in surgical patients who undergo total hip replacement under spinal anesthesia. Our goalwas to assess postoperative shivering and inflammatory response. Methods: Sixty-two surgical patients were recruited by informed notice. Datafor this study were collected at a 1,300-bed university hospital in Incheon, South Korea from January 15 through November 15, 2013. Data onCBT, systemic blood pressure (SBP), and heart rate were measured from arrival in the pre-anesthesia room to 3 hours after the induction of spinalanesthesia. Shivering was measured for 30 minutes post-operatively. C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) weremeasured pre-operatively, and 1 and 2 days postoperatively. The 62 patients were randomly allocated to an experimental group (EG), which underwentpre-warming for 30 minutes, or a control group (CG), which did not undergo pre-warming. Results: Analysis of CBT from induction ofspinal anesthesia to 3 hours after induction revealed significant interaction between group and time (F=3.85, p=.008). In addition, the incidenceof shivering in the EG was lower than that in the CG (c2=6.15, p=.013). However, analyses of SBP, heart rate, CRP, and ESR did not reveal significantinteraction between time and group. Conclusion: Pre-warming for 30 minutes is effective in increasing CBT 2 and 3 hours after induction ofspinal anesthesia. In addition, pre-warming is effective in decreasing post-operative shivering.