The DRS stands for Drag Reduction System, which enables a car to open its rear wing to limit the downforces on the car. This increases the car's theoretical performance and in theory facilitates passing.
The nonsurgical treatments for obstructive sleep apnea include behavior therapy, including weight loss, medications, dental appliances, continuous positive airway pressure, bi-level positive airway pressure, and auto-titrating continuous positive airway pressure.
Central sleep apnea is a much less common type of sleep apnea that involves the central nervous system, occuring when the brain fails to signal the muscles that control breathing. People with central sleep apnea seldom snore. Complex sleep apnea is a combination of obstructive sleep apnea and central sleep apnea.