Purpose: In our study, it was aimed to compare the posture, core endurance and lumbopelvic stability of intern physiotherapist with and without nonspecific low back pain (NLBP). Methods: Ninety-seven students studying in the Department of Physiotherapy and Rehabilitation of the Faculty of Health Sciences of Süleyman Demirel University in the 2021-2022 academic year were included in the study. The physical activity levels of the participants were determined by the International Physical Activity Questionnaire-Short Form (IPAQ-SF). Low back pain severity was evaluated with the Numerical Pain Rating Scale (NRS). The New York Posture Analysis Scale (NYPAS) was used for posture analysis, and the Oswestry Low Back Disability Index (ODI) was used to evaluate low back pain related disabilities. The Lumbopelvic Stability Cuff Test (LPSCT) was performed with the McGill Torso Endurance Test Battery to evaluate the core endurance and lumbopelvic stability of the participants. Results: The study was completed with a total of 90 intern physiotherapist with (GroupPain, n=46, 51.1%) and without (GroupPainless, n=44, 48.9%) low back pain. Although the groups were similar in terms of posture characteristics (p>0.05), it was found that the level of physical activity and low back pain-related inadequacies were statistically significantly higher in the low back pain group (p<0.05). It was determined that the LPSCT score of GroupPain was significantly lower than that of GroupPainless (p<0.05), and the trunk extensor muscle endurance time of GroupPainless was significantly higher (p<0.05). In addition, as the duration of pain and NRS scores during activity of the intern physiotherapists with low back pain increased, the ODI scores also increased (rho=0.328, p<0.05 and rho=0.466, p<0.01, respectively). Conclusion: In the light of the data obtained from our study, low back pain in intern physiotherapists; although it does not cause a change in posture, it has been predicted that it may be associated with decreased trunk extensor muscle endurance, insufficiency due to low back pain, and poor lumbopelvic stability.