Apnea is an unintentional temporary interruption of breathing that takes place while asleep and that prevents oxygen from reaching the lungs properly due to a relaxation of the muscles around the throat. This pathology causes a disrupted sleep that is reflected by tiredness and lack of energy during the day. Apneas are directly linked to age, overweight and some particular physical builds, and affects mainly males. More information on this subject and its treatment in the section called Treatments on this website.