## 2 Materials and Methods
### Description of Applied Methods and Their Explanation  
McGill University Pain Questionnaire--back pain and disability of spine  
It describes the intensity of current pain as well as sensory and affective dimensions. It consists of 15 questions describing the different types of pain and the intensity of actual pain from zero to unbearable 5. The higher the score, the greater the pain intensity. Oswestry Disability Index (ODI)  
It informs about the range of back and joint pain-related disability. It consists of 10 sections: Section 1--Pain Intensity. Section 2--Self care (washing, dressing, etc.) Section 3--Lifting, Section 4--Walking, Section 5--Sitting, Section 6--Standing, Section 7--Sleep, Section 8--Sexual life, Section 9--Social life, Section 10--Travelling. Each section is scored on a 0-5 scale, where a higher number characterizes a higher degree of pain-related disability. The questionnaire is filled in at the initial examination and consequently before the end of complex rehabilitation treatment. The Foot and Ankle Disability Index (FADI)  
The Foot and Ankle Disability Index FADI is a 34-item questionnaire that is divided into two scales--foot and ankle. FADI has 26 items (4 items for pain evaluation and 22 items for activity evaluation). FADI sport has 8 items (evaluation of activities). Items detect function deficits in athletes. Knee pain and disability  
The International Knee Documentation Committee (IKDC)--Knee function evaluation questionnaire. It has 3 categories--symptoms, sports activity, and knee function. Symptoms such as pain, stiffness, swelling, and knee dysfunction are evaluated. Sports activity subscales evaluate functions such as walking up and down stairs, standing up from a chair, squats, and jumps. In what condition is the knee now and how it was before the injury is scored on a 0 to 100 scale. The higher the score, the better the knee function. \begin{table}
\begin{tabular}{c c} \hline \hline
**Disability and Injuries** & **Quality of Life and PA** \\ \hline McGill Pain Questionnaire. & EuroQol-5 Dimension (EQ-5D-5L) \\ Oswestry Disability index & International Physical Activity \\ The International Knee & Questionnaire \\ Documentation Committee & Questionnaire \\ The Foot and Ankle Disability Index FADI & \\ Oxford’s hip score & \\ Shoulder pain and disability index & \\ The Patient-Rated Wrist Evaluation & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: List of questionnaires used in the study. Hip pain and disability  
Oxford's hip score--Questionnaire containing 12 questions. It includes two--pain and disability. Six items in each section; 1 = least difficult, 5 serious difficulties. The scores range from 12 to 60. The lower the score, the better the result: 0-19--severe arthrosis of the hip, 20-29 severe-to-moderate hip arthritis, 30-39--moderate-to-mild hip arthritis, 40-48--good hip function. Shoulder pain and disability index (SPI) consists of two dimensions, one for pain and the other for functional activities. It assesses the severity of pain in 5 questions and the disability related to functional activities in 8 questions. The scoring: 0--means no pain and disability, 100 means severe pain and disability. Elbow pain and disability  
Oxford Elbow Score (OES)--contains 12 items with 5 response options each, and evaluates the upper limb disability and the elbow function. It has a high internal consistency and reliability. The higher the score, the better the result: Scoring: 4--no difficulties; 3--moderate difficulties; 2--small difficulties; 1--big difficulties 1; 0--no performance possible. Interpretation of the questionnaire: 0-19 points indicate severe arthritis of the elbow, orthopedic consultation required; 20-29 Indicates moderate-to-severe arthritis of the elbow. Consider orthopedic consultation; 30-39 indicates mild-to-moderate elbow arthritis. Recommendations for conservative treatment, including physiotherapy; 40-48 indicates good elbow joint function. It does not require any treatment.