Adjustable rear wing -. Drag Reduction System (DRS) New FIA moveable bodywork technical regulations for 2011 have allowed adjustment of the rear wing from the cockpit at any time in practice and qualifying, but only when a driver is less than one second behind another car at a pre-determined point on the track during a race. Braking deactivates the device.
The person with sleep apnea is usually unaware of this. The interruption to breathing can occur hundreds of times a night, resulting in markedly fragmented sleep. As a result, people with sleep apnea feel excessively sleeping during their normal waking hours.
The average cycle is 1 hour and 30 minutes, however cycle length can vary from 60-120 mins. depending on the person. If we truly were to sleep without any disturbances and no alarm clocks, we would always wake up on a multiple of 90 minutes. For example after: 4.5 hours, 6 hours, or 9 hours of sleep. E.g., 5 complete sleep cycles = 90 mins + 90 mins. + 90 mins. + 90 mins + 90 mins = 7.5 hours of sleep.