Background: A spinal extension and intensive rehabilitation program reduced the symptoms and pain of kyphosis, and improved function.
Objects: This study aimed to demonstrate the effect of a spine extension device on the degree of thoracic kyphosis and extension angles, confirm reduction of the kyphosis angle and an increase in flexibility.
Methods: Thirteen adults were enrolled in the experiment, using the spine extension device, which was set to passively extend the spine. The angle between the spinous process of the first thoracic vertebra and the spinous process of the twelfth thoracic vertebra was measured by dual inclinometer before and after using the spine extension device.
Results: In the static posture, the thoracic kyphosis decreased after using the spine extension device in the thoracic extension posture, and there was a significant difference (p < 0.05); thoracic extension angle increased with statistical significance (p < 0.05).
Conclusion: In this study, the thoracic kyphosis angle and thoracic extension angle of the subjects before and after using spine extension device was compared and analyzed, which proved that the spine extension device can effectively improve the mobility of spinal extension.

INTRODUCTION
MATERIALS AND METHODS
    1. Participants
    2. Equipment
    3. Experimental Method
    4. Statistical Analysis
RESULTS
DISCUSSION
CONCLUSIONS
FUNDING
ACKNOWLEDGEMENTS
CONFLICTS OF INTEREST
AUTHOR CONTRIBUTIONS
ORCID
REFERENCES

• Ju-hyeon Kim(Department of Physical Therapy, College of Healthcare Medical Science and Engineering, Inje University)
• Seon-mi Park(Department of Physical Therapy, College of Healthcare Medical Science and Engineering, Inje University)
• Hyang-hee Sin(Department of Physical Therapy, College of Healthcare Medical Science and Engineering, Inje University)
• Ho-jeong Choi(Department of Physical Therapy, College of Healthcare Medical Science and Engineering, Inje University)
• Yaoyao Liu(Department of Rehabilitation Science, Inje University Graduate School, Gimhae, Korea)
• Won-gyu Yoo(Department of Physical Therapy, College of Healthcare Medical Science and Engineering, Inje University) Corresponding Author