Context:Core muscles provide accurate proprioceptive information. Altered neuromuscular control is a predisposing factor in LBP. The core muscles are multifidus, rotators, transverse abdominis, internal oblique and quadratus lumborum. Aims: To examine the effects of 2 commonly used PNF techniques, on core strength in healthy females for prevention of low back pain and reduce the risk of injury. Settings and Designs Methods and Material: Primary data collection was done using computerized randomized sampling. 50 healthy females between the age group of 18-25 years were taken based on the selection criteria and informed consents were obtained. PNF techniques were given to the participants within a period of 4 weeks and core strength was measured by aneroid sphygmomanometer and one minute sit up test before and after 4 weeks of intervention. Data were analyzed using paired sample t-test and Wilcoxon test. Statistical analysis: The pre test mean of core strength using sphygmomanometer was 6.47±3.13 and post test was 16.25±4.49 which was statistically significant (p <0.001) (t=18.153). The pre test mean of one minute sit up test was 22.77±4.40 and post test was 32.49±4.65 which was statistically significant (p <0.001) (z = -5.981) at the end of the 4 week period. Conclusion: The result of the study shows that the application of 4-week PNF programs has significant effect on core strength in healthy females.