Known or suspected non-compliance, drug or alcohol abuse

Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, etc. of the participant

Previous enrolment into the current study

Enrolment of the investigator, his/her family members, employees and other dependent persons

Intake of blood pressure medication

Intake of medications affecting sleep or the performance or the respiratory, cardiovascular or neuromuscular system

Acute or chronic illness other than prehypertension

Respiratory Muscle Training and Intermittent Hypoxia: Additive Health Effects?