PURPOSE: This study aims to assess the effects of an 8-week core stability training on the kinematics and kinetics of trunk flexion and extension motions in patients with chronic nonspecific low back pain (CNSLBP). METHODS: A total of 30 CNSLBP patients with the age range of 25 to 45 years were randomly divided into 2 equally sized groups. The subjects were identified through clinical examination. Before and after the training, tests were applied to assess peak 3 dimensional hip joint moments, peak negative and positive hip joint powers, and lumbopelvic coupling angles during trunk flexion and extension motions. The first group underwent an 8-week core stability training program, including the specific exercise of the deep muscles of abdominal along with the lumbar multifidus co-activation. After the 8-week program, the post-test stage was performed similarly to the pre-test. RESULTS: The main effects of "time" (p = 0.029, f = 0.84) and "time-by-group" interactions (p = 0.03, f = 0.16) for hip abductor moments and internal rotator moment (p = 0.03, f = 0.87) were significant. A trend toward the statistically significant main effect of "time" was found for the coupling angle during the flexion phase (p < 0.05, f = 1.88), extension phase (p = 0.02, f = 0.93), and "time x group" interaction during the flexion (p < 0.05, f = 1.96), extension (p = 0.01, f = 0.96) phases. CONCLUSION: Core stability training has the potential to improve kinematics and kinetics during trunk flexion and extension motions in patients with CNSLBP.

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