一日之计在于晨

为什么一日之计在于晨?
why? why? why? (tone of "mooncake storm" drama)

In human body, our beloved adrenal cortex secretes glucocorticoids and CORTISOL , is one of the glucocorticoids. Cortisol is secreted highest during 6am-8am, the hormone then slowly decreases in its secretion from 8am to 8pm and at normal circumstances,cortisol secretion is lowest during about 9pm.

Cortisol is also known as "stress hormone". as its name implies, the hormone helps us to cope with stress by metabolising glucose, lipid and protein (via gluconegenesis,lipolysis,protein degradation) in our body thus liberate energy.

The highest amount of cortisol is at 6-8am, which means our body has more energy during that range of time.That's why we said 一日之计在于晨!

Therefore,we should do all our work/stressfull work/planning work from 6am to 8am then we can spend whole day sleeping bcoz we have most energy from 6am to 8 am.