The method to increase and accelerated rehabilitate the capacity for work is characterized in that the person is exposed to gaseous products having the property to improve physical and psychological human capabilities during a period of preparing for extreme strains and/or after extreme strains; the exposure to gaseous products is performed during a period from several weeks to several minutes before undergoing extreme strains by inhaling the gaseous mixture composed of oxygen and/or air and at least one inert gas, mainly xenon, with the contents of oxygen or air from 20% to 98% and at least one inert gas from 2% to 80%. The inhalation with the gaseous mixture is carried out until the state of euphoria emerges but no longer than for 20 minutes with breaks or without them; preferably, the inhalation with the gaseous mixture is performed no less than for 10 seconds and no longer than for 20 minutes with breaks or without them. Permanent and accelerated rehabilitation of the organism's capabilities and work capacity improvement during preparatory periods for extreme strains and in the course of extreme stressful strains as well as prompt rehabilitation of the diminished organism after extreme physical strains is provided due to the impact of gaseous products, i.e. oxygen cocktails having the property to improve human physical and psychological abilities and relieve mental, emotional and physical strain, pain and tiredness.