人体随时间节律有时、日、周、月、年等不同的周期性节律。例如人体的体温在24小时内并不完全一样，早上4时最低，晚上18时最高。人体的正常的生理节律发生改变，往往是疾病的先兆或危险信号，矫正节律可以防治某些疾病。
研究指出，按照人的心理、智力和体力活动的生物节律，来安排一天、一周、一月、一年的作息制度，能提高工作效率和学习成绩，减轻疲劳，预防疾病及防止意外事故的发生。反之不按体内的生物钟的节律安排作息，人就会在身体上感到疲劳、在精神上感到不舒适。
| 熱門國家 | 系統支援 | 版本 | 費用 | APP評分 | 上架日期 | 更新日期 |
|---|---|---|---|---|---|---|
| 未知 | Android Google Play | 1.0 App下載 | 免費 | 1970-01-01 | 2015-03-10 |
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