Background: Early diagnosis and intervention of sarcopenia require awareness among health care professionals. However, there is currently no sarcopenia survey specifically targeting Korean physical therapists, and there is a lack of tools available for conducting such research. Cognitive interviewing (CI) is widely recommended as a pre-test method to refine and enhance questionnaire items before initiating a survey, ensuring that the questions are wellsuited to the research objectives. Objectives: This study aimed to revise and review the items of a sarcopenia questionnaire for administration to Korean physical therapists using CI. Design: Qualitative research. Methods: Six physical therapists participated in interviews to review and develop survey questions related to sarcopenia. The questions were evaluated based on their clarity, the comprehensibility of the terms used, the confidence with which respondents could recall relevant information, the appropriateness of the difficulty level, and suggestions for improving the questionnaire. Results: Participants encountered issues such as difficulty understanding the questions, unclear or incorrect answer options, and unfamiliar terminology. Conclusion: The sarcopenia questionnaire was revised and improved through CI. Additionally, the study identified specific areas where physical therapists may struggle with sarcopenia-related content, including terminology and knowledge gaps.

INTRODUCTION
SUBJECTS AND METHODS
    Subjects
    Subjects
    Data collection
    Data analysis
RESULTS
    General characteristics of participants
    Interview results
    Problems related to the questions
    Problems related to the options
    Problems related to the understanding of terminology
    Questionnaire modifications
DISCUSSION
CONCLUSION
REFERENCES

• Jaehyun Lim(Department of Physical Therapy, Nambu University, Gwangju, Republic of Korea)
• Byeonggeun Kim(Department of Physical Therapy, Nambu University, Gwangju, Republic of Korea)
• Ahyoung Choi(Department of Rehabilitation, Songwon University, Gwangju, Republic of Korea) Corresponding author