Adaptation to hypoxia is an important training factor for patients with ischemic heart disease subjected to aortocoronary shunting. In the conditions of low-maintain health resort this adaptation lasts for 3-5 days and most of the patients avoid complications. Pathological reactions occur in patients with inadequate reserves of the coronary system, having essential hypertension, severe concomitant diseases, in those who arrived at health resort earlier than 5 months after aortocoronary shunting.