J Korean Phys Ther.  2024 Feb;36(1):9-13. 10.18857/jkpt.2024.36.1.9.

A Study on the Change in the Results of the Straight Leg Raising Test according to the Intensity of Microwave Diathermy

• Kang JH
• Park TS

• KMID: 2563057
• DOI: http://doi.org/10.18857/jkpt.2024.36.1.9

Abstract

Purpose
Although microwave diathermy is widely employed, research conducted in South Korea indicates a lack of theoretical understanding concerning the appropriate application intensity. Consequently, there is a need to enhance the objectivity of microwave diathermy by conducting quantitative studies to determine its effective application intensity and provide suitable application parameters.
Methods
The study was performed on 60 participants, divided equally into 40W or 80W microwave diathermy intervention groups. Microwave diathermy was applied at 2,450MHz to iliocostalis and longissimus muscles for 15 minutes in each group. Ranges of motion were compared before and after intervention using straight leg raise (SLR) test results. The analysis was performed using the paired t-test and the independent t-test.
Results
SLR angles increased significantly in both groups after intervention, but the 80W group exhibited a greater post-intervention angle increase. While no significant intergroup difference was observed between pre-intervention angles, post-intervention angles were significantly different.
Conclusion
The study confirms that microwave diathermy treatment at 40W for 15 minutes effectively increases SLR angles but that treatment at 80W has a greater effect. Further research is warranted to establish quantitatively the optimal time and intensity settings for microwave diathermy.

Keyword

Microwave diathermy; Physical examination; Physical therapy modalities