Sleep Cycle
睡眠紀錄鬧鐘
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.
輕鬆起床和時機有關。「睡眠紀錄鬧鐘」(Sleep Cycle alarm clock)可以追蹤你的睡眠型態，並於你淺眠時叫醒你。淺眠時起床，就像沒有鬧鐘睡到自然醒一樣。
Sleep Cycle
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.
睡眠週期
睡覺時，會經歷各種睡眠階段。第一階段是淺層睡眠，其次是深層睡眠和處於做夢狀態的快速動眼睡眠（Rapid Eye Movement sleep，REM-sleep）。完整的睡眠週期持續約90分鐘，基本上每晚重複數次。
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.
睡眠紀錄鬧鐘
每個睡眠階段會有不同的動靜。睡眠紀錄鬧鐘以手機的加速度感應器記錄下躺在床上的姿勢，來判斷睡眠狀態。然後，睡眠紀錄鬧鐘會提早三十分鐘，於淺層睡眠時叫你起床。
Examples of real life sleep graphs generated by Sleep Cycle alarm clock
睡眠紀錄鬧鐘實測睡眠曲線圖範例
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.
範例一-規律睡眠
這個曲線圖顯示每90分鐘的高峰。高峰群表示睡眠週期，包含上述提到的睡眠階段。此曲線圖為規律睡眠的典型範例。
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.
範例二-不規律睡眠
相較於第一個例子，這個曲線圖顯示使用者睡眠較不規律。使用者在凌晨2-4點進入淺眠期，接著早上7點30分短暫清醒。
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.
範例三-無法追蹤的睡眠
當手機無法偵測你在床上的動靜時，睡眠圖會如此圖表所示。倘若遇到此狀況，請務必再次測試。你可以依照指示在睡眠紀錄鬧鐘中找到定位測試。在此測試中，當你有任何動靜時，手機理應發出聲響。假如應用程式無法正常運作，試著將手機放得更靠近身體。
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.
範例四-睡眠障礙
此圖顯示出飲酒影響睡眠週期的狀況，儘管飲酒能讓你更快入睡，卻使人難以維持良好的睡眠品質。實驗對象在前半個夜晚偶爾會進入深層睡眠，但後半夜則時而淺眠，時而清醒。
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