Please make sure that you have read and understood the waiver and do not suffer from any of the below conditions:
chronic obstructive pulmonary disease (COPD-II and COPD-III)
chronic diseases with symptoms of decompensation or terminal illness
individual intolerance of oxygen insufficiency
acute somatic and viral diseases
not recommended in serious cardiac and hypertension cases
cancer, unless IHT is prescribed by a doctor
people with epilepsy, pacemakers or heart arrhythmias, unless treatment (including Intermittent Hypoxic Training) is under direct medical supervision