The goal of this observational study is to assess validity and reliability of Persian Version of Low Physical Activity Questionnaire. The main questions it mains to answer are:

What is the level of physical activity in hemodialysis patients? Is Persian Version of Low Physical Activity Questionnaire, Valid to assess physical activity levels of dialysis patients?

Is Persian Version of Low Physical Activity Questionnaire, reliable?

Participants will answer 3 questionnaires and will do some functional tests.

Currently, between 8 and 16 percent of the world's population is suffering from chronic kidney disease, and this number is increasing day by day, and it is predicted that by 2040, kidney disease will be the fifth cause of death.

End-stage kidney disease patients, especially hemodialysis patients, face various problems, and during the years of dialysis, they suffer from many complications and problems, such as repeated hospitalizations, reduced physical performance, reduced aerobic capacity, low quality of life, and having a sedentary life. suffer, so that the activity level of these patients is between 20 and 50% of healthy people.

The physical activity level of patients undergoing hemodialysis treatment is low and significantly lower than the same inactive control groups. Research has shown that the level of physical activity of hemodialysis patients gradually decreases by approximately 4.5% per month during the entire period of the disease . In addition, the activities related to the work done at home constitute the largest part of the energy consumption of hemodialysis patients, which means that the types of activities of hemodialysis patients are usually limited to the lower category.

Valid instruments for measuring physical activity at the low end of the physical activity range and producing quantitative results are required among dialysis patients who are extremely inactive. This study aimed to translate and adapt a Persian version of the low physical activity questionnaire (LoPAQ) and to examine its reliability and validity among hemodialysis patients.

Inclusion Criteria:

• Age ≥18 years
• On hemodialysis for ≥3 months
• Able to walk without assistance
• Ability to provide informed consent and complete the questionnaires

Exclusion Criteria:

• Diagnosis of mental or cognitive disorders
• Unstable conditions
• Hospitalization in the previous 3 months

Hemodialysis patients being treated with the same respective dialysis modalities for at least 3 months and being ambulatory (with or without assistive device) will be included.

But non-ambulatory patients having significant cognitive dysfunction, progressive degenerative,neurologic disease or severe rheumatologic or orthopedic conditions, angina upon exertion, or myocardial infarction or cardiac surgery within the last year will be excluded.

The data will be available after the paper is published. No end date.

The data will be available after the paper is published. No end date.

Data will be accessible with no criteria. Anyone who wishes will have access to data.