Waking up easy is all about timing. Sleep Cycle alarm clock tracks your sleep patterns and wakes you up during light sleep. Waking up during light sleep feels like waking up naturally rested without an alarm clock.
Sleep Cycles
While you sleep, you go through a cycle of sleep phases. The first phase is light sleep, followed by deep sleep and a dream state referred to as REM-sleep. A full sleep cycle lasts about 90 minutes and is normally repeated several times each night.
Sleep Cycle alarm clock
Your movements vary with each sleep phase. Sleep Cycle uses the phone’s accelerometer to identify sleep phases by tracking movements in bed. Sleep Cycle then wakes you up during your lightest sleep phase, using a predefined 30-minute alarm window.
輕鬆早起的關鍵在於掌握時間。睡眠週期鬧鐘追蹤您的睡眠模式，並在淺層睡眠時叫醒您。在淺層睡眠時醒來感覺就像自然醒。
當您睡覺時，您進入睡眠週期階段。第一個階段是淺層睡眠，接下來是深層睡眠和稱為快速眼動睡眠（REM-sleep）的做夢狀態。完整的睡眠週期約持續90分鐘，且一般來說每個晚上會重複幾次。
您的睡姿會隨著睡眠階段而改變。睡眠週期利用手機的動作偵測器追蹤您的動靜，來辨識睡眠階段。睡眠週期鬧鐘會用預設好的鬧鐘在睡醒前30分鐘喚醒您。
Examples of real life sleep graphs generated by Sleep Cycle alarm clock
Example 1 – Regular sleep
This graph shows peaks about 90 minutes apart. The peaks represent sleep cycles, including all sleep phases described above. This is a great example of a sleep graph showing regular sleep patterns.
此曲線圖分別顯示了每90分鐘一波的高峰。這些高峰代表了睡眠周期，包括了前面提及的所有睡眠階段。這是一個典型的規律睡眠曲線圖。
Example 2 – Irregular sleep
This graph shows more irregular sleep where the user probably didn’t sleep as well as in our first example. Here the user remained in lighter sleep phase 2am-4am and woke up for a short period of time at 7.30am.
這個圖表展現了更不穩定的睡眠狀態，使用者可能不像我們第一個範例中那樣睡得安穩。他在凌晨兩點到四點處於淺睡眠狀態，然後在早上七點半醒來一下。
Example 3 – Untracked sleep
This is what a sleep graph will look like if the phone has trouble sensing your movements in bed. If you experience this, make sure to redo the placement test. You can find the placement test in your Sleep Cycle app under Instructions. During the placement test, your phone should make a sound each time you move. If you’re having difficulties getting it to work, try placing the phone closer to your body.
這是手機偵測到你睡姿有問題時的睡眠曲線圖。如果你遇到這樣的情形，請務必去重置定位測試。你可以根據睡眠週期應用程式的指示找到它。在定位測試中，你的手機會在你每次移動時發出聲響。如果鬧鐘無法運作，請試著將手機貼近您一點。
Example 4 – Disturbed sleep
The graph shows how alcohol influence can disrupt your sleep cycles. Although alcohol can make you fall asleep faster, it will make it harder for you to sustain a good nights sleep. The user in our example occasionally enters deep sleep during the first half of the night, but remains in lights sleep altered with period of being awake for the second half.
More information is available in our FAQ
該圖顯示了飲酒會破壞我們的睡眠週期，即使飲酒使我們更快進入睡眠，但它也使我們更難維持良好的睡眠質量。在這個範例中，飲酒者通常在上半夜會進入深層睡眠，但是後半夜卻處於時而清醒時而淺眠的狀態中。
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