4. Power Naps Will Make You Feel Refreshed
4. 打個高質量的盹可恢復元氣

Naps are awesome, but they’re not all equally restorative. Depending on how long you nap, you might end up feeling groggy when you wake up. Aim for about 20 minutes if you want a boost in energy and mental alertness.
打盹的作用很神奇，但并不總能讓你恢復活力。這要看你睡了多長時間，也許你醒來還是昏昏沉沉。如果你想變得精力充沛、頭腦清醒，就睡20分鐘吧。