OBJECTIVES: Postoperative positioning has beneficial effects on postoperative blood-saving, HGB and HTC reduction after knee replacement, and reduces the complications of transfusion. METHODS: Total of 96 people with hip replacement (age 69±20) were included in 4 groups who were treated on Orthopaedic Department in Zala County Hospital in 2012. I.a.group: traditional way of physiotherapy following the hospital protocol (not upraised lower limb) I.b.group: the same to I.a., supplemented with one special exercise from PNF-method (irradiation, effecting the operated side; repeat it 5-15 times/hour during the first 3 day) II.a.group: placed the lower limb in 30o hip and knee flexion + traditional physiotherapy, II.b.group: same to II.a, supplemented with the special PNF exercise. The postoperative blood volume (after 6, 24, 48, 72 hours) and HGB, HTC (pre- and postop.24h) were measured. Data were analysed by Wilcoxon-tests applying SPSS statistic software. RESULTS: The 30ohip and knee flexion increased the postoperative bleeding (mean(ml)±SD 506.3±193.4 vs 570.8±222.4) with 12% after 6 hours, but the difference was not significant (p=0,1494). The applied specific PNF exercise increased the volume of the 6 hours postoperative bleeding with 5.6%  (mean(ml)±SD 514,16±215,7 vs 543,05±202,0); in 72 hours 5.3% (mean(ml)±SD 1080,55±327,6 vs 1138,44±368,4); but the difference was not significant (p=0,519 vs 0,4298). There were not significant differences between the four groups regarding the postoperative bleeding from all aspects. HGB and HTC reduction were near similar in all groups; the differences were not significant among the groups. CONCLUSIONS: This study proved that the 30o hip and knee flexion slightly increased the postoperative bleeding but it’s not a significant level, so it’s not suggested for blood-saving. PNF exercise has slightly increased the postoperative bleeding but it is also not a significant level. Maybe PNF exercise increases mildly the elimination of the produced wound fluid.