@Carlos javier González Chamorro could ut be that the feeling you mean can be described as being in a state of flow? From Wikipedia: Flow in positive psychology, also known colloquially as being in the zone or focused, is the mental state in which a person performing some activity is fully immersed in a feeling of energized focus, full involvement, and enjoyment in the process of the activity. In essence, flow is characterized by the complete absorption in what one does, and a resulting transformation in one's sense of time. Flow is the melting together of action and consciousness; the state of finding a balance between a skill and how challenging that task is.