Participants diagnosed with arterial hypertension who exhibit symptoms of dysfunctional breathing, as determined by the Nijmegen Questionnaire. Assessments will include anthropometric measurements, functional exercise capacity tests, and balance evaluations.

Nijmegen Questionnaire: The questionnaire is used for the assessment and identification of respiratory dysfunction, unexplained respiratory symptoms, and hyperventilation syndrome indicators. It consists of 16 items covering neurological, cardiovascular, respiratory, gastrointestinal, and psychological factors. Each item is rated on a 5-point Likert scale, with a total score ranging from 0 to 64. Higher scores indicate an increased likelihood of respiratory dysfunction and hyperventilation syndrome. A score above 23 supports the possible diagnosis of dysfunctional breathing. The questionnaire has a sensitivity of 91% and a specificity of 95%. The Turkish version of the questionnaire has been validated and found to be reliable.

The Timed Up and Go Test is a method used to rapidly assess an individual's balance control. During the test, the participant is instructed to rise from a seated position in a chair, walk a distance of 3 meters, turn around a reference object, return to the chair, and sit down again. The time taken to complete the task is recorded in seconds. The test will be repeated three times, and the average of the three trials will be used for analysis.

The Berg Balance Scale is used to assess balance through progressively challenging tasks by reducing the level of support provided by the surface. The scale consists of 14 items, each scored from 0 to 4 (4: best performance, 0: poorest performance). A total score between 41-56 indicates a low risk of falling, 21-40 reflects a medium fall risk, and scores below 20 indicate a high fall risk.

Neck circumference will be measured using a flexible plastic measuring tape at the level of the cricoid cartilage, with the participant in an upright and relaxed position