歴史ポッドキャスト · アップデート：週2回 · Throughline is a time machine. Each episode, we travel beyond the headlines to answer the question, "How did we get here?" We use s...

https://podcasts.apple.com/jp/podcast/throughline/id1451109634

, because the N2 stage is predominant (often making up more than 50 percent of a night’s sleep), normal, and an important aspect of sleep physiology, contai...

https://www.apple.com/jp/healthcare/docs/site/Estimating_Sleep_Stages_from_Apple_Watch_Sept_2023.pdf