At what oxygen concentration do people begin to experience impaired judgment and coordination?

Impaired judgment and coordination in individuals typically begin at oxygen concentrations around 17% or lower. Under normal atmospheric conditions, the oxygen concentration is approximately 21%. When the concentration drops to about 17%, the body may not receive sufficient oxygen, which can affect brain function and physical coordination. Individuals may experience symptoms such as dizziness, shortness of breath, and impaired cognitive abilities due to limited oxygen availability, which significantly impacts their decision-making and motor skills. Understanding these thresholds is vital in assessing potential risks in environments where oxygen levels might fluctuate, such as in confined spaces or during certain industrial activities.