Background: Spinal Mobilization is one of the manual therapy technique that clinicians have used to treat pain, however, there is still a lack of research on changes in strength in healthy people.
Objectives: To investigate the effect of posterior-anterior lumbar mobilization on lower limb strength in healthy individuals.
Design: Two-group pretest-posttest design.
Methods: In this study, 23 healthy subjects aged 20 years were assigned to 12 lumbar mobilization group (LMG) and 12 sham group (SG) to perform intervention and measurement through pre- and post-design. Intervention was performed in LMG with grade III~IV on L3-5 of the lumbar spine, and lumbar mobilization was performed for each segment. After intervention, knee flexion and extension strength were measured. To measure the main effect on muscle strength, a comparative analysis was conducted using paired t-test and independent t-test. Results: In LMG, knee flexor and extensor strength were increased significantly at 60°/s (P<.05). In addition, the extensors of LMG and SG were significantly different only at 60°/s, and the flexors were significantly different between groups at both 60°/s and 180°/s (P<.05).
Conclusion: In healthy individuals, lumbar mobilization results in improvement of strength of knee flexor and extensor, and additional experiments on the effect of mobilization on the lumbar spine on functional changes in the lower limbs will be needed.

INTRODUCTION
SUBJECTS AND METHODS
    Research design
    Subjects
    Intervention Procedures
    Outcome Measures
    Statistics and Analyses
RESULTS
DISCUSSION
CONCLUSION
REFERENCES

• Hojung An(Department of Physical Therapy, Dongnam Health University)
• Junghyun Choi(Department of Physical Therapy, Namseoul University)
• Taeseok Choi(Department of Physical Therapy, Namseoul University)
• Seoyoon Heo(Department of Occupational Therapy, School of Medical and Health Care, Kyungbok University)
• Chaegil Lim(Department of Physical Therapy, Gachon University)
• Wansuk Choi(Department of Physical Therapy, International University of Korea) correspondence