1.The more you sleep the more lazy you are while you sleep late on weekends,which makes your spirit more tired.8 F6 M' Z1 ~0 A
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2. The cycle of daily circadian rythum regulates the internal clock.
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0 T8 v2 N3 \: H" F3.It's much more efficient to sleep early than to stay up 5 K' s8 P) u2 K t) {
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4.The best way to meet your sleeping balance between weekdays and weekends is to have an eight-hour sleep.' l; c- b, ]. c8 j. g6 x7 G
* @+ ?5 C V9 W6 N6 I# ~5.为了保持我们的生物钟,我们需要在平时起床时间前八个小时就上床睡觉。
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