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  • Good morning body! Time for another day. Your alarm goes off, you hit the snooze button

  • and lay there for few minutes between the land of wake and sleep known as the hypnopompic

  • state. When you do finally get up, youre groggy and disoriented thanks to sleep inertia.

  • Most of it is shed in 10 minutes, but can sometimes linger for a few hours. During this

  • time your body temperature is still low, but your blood pressure is sharply rising. There’s

  • a 50% increase in the stress hormone, cortisol, pumping through your bloodstream, in preparation

  • for the stresses of your day!

  • Time for a shower! It’s also the best time to shave as clot forming platelets are most

  • abundant right now, making your blood more sticky. Meaning less bleeding from cuts! But

  • it’s also the time of day when heart attacks most often occur.

  • 7:30am swings around and it is time for coffee and breakfast. Enjoy the smell before sipping!

  • 75% of how we enjoy flavour is not through the tongue, but through smell! The vapours

  • pass through your mouth, around the soft palate, into the nasal cavity and to the olfactory

  • bulb. Mmm that’s good!

  • Settling in at work, and your mental activity is actually at a peak in late morning. Most

  • of us are sharpest 2 and a half to 4 hours after waking. But your memory is impacted

  • as the day moves on. In the morning we forget an average of 5 facts, but by afternoon we

  • forget around 14. Not if youre a young adult though. In fact the reverse is true,

  • with young people becoming more mentally alive in the afternoon and evening. But, at night

  • our biological clock seems to turn off the proteins involved in forming long term memories,

  • which is why it’s best not to cram for a test all night.

  • It’s noon and it’s time for lunch! Your stomach is able to expand as much as two and

  • half pints to receive a meal. Here it stays for a few hours before it’s sent to your

  • small intestine. We digest meals without even thinking about it - in fact, there is a brain

  • of sorts in your belly called the enteric nervous system which performs everything from

  • sensing nutrients, measuring acids, and coordinating the immune system to defend your gut.

  • Around 2:30pm and lunch has left us a wave of fogginess and fatigue. After a meal your

  • body has a short boost in energy from the glucose, but is then followed by a wave of

  • insulin, the hormone that transports sugar to your cells. Scientists believe that insulin

  • might pull too much from your blood, causing an energy nosedive. However, this phenomenon

  • occurs even if you don’t have lunch, which has led to much research on the power of naps,

  • which increase productivity and safety.

  • 4:30pm and it’s time to hit the gym. Though many try to work out in the morning, studies

  • suggest that you may gain 20% more muscle strength by working out in the afternoon.

  • Your airways are more open, your heart works more efficiently and your reaction time is

  • at its peak. Much of this has to do with your core body temperature peaking later in the

  • day. Even most sports records are achieved between 3pm and 8pm.

  • Now you start off the evening by joining some friends for drinks. During cocktail hour you're

  • actually more tolerant to the effects of alcohol. In one study, those drinking vodka at 9am

  • had significantly worse reaction time and psychological functioning than those who had

  • the same dose at 6pm.

  • It’s around 8:30pm now and you catch someone’s eye in the bar. Most of our mammalian ancestors

  • have ways of advertising their fertility. It turns out that human women also give cues

  • when theyre ovulating. In fact, when looking at pictures of women, studies show men find

  • women in the fertile phase to be more attractive.

  • You ask each other to dance - which brings you close enough to get a wiff - after all,

  • your sebaceous and apocrine glands release scents through the armpit which potential

  • partners may find attractive. And because humans walk upright, the armpit is the ideal

  • body part to disperse scent.

  • It’s 11pm now, which is the most popular time for sexual activity. Which has little

  • to do with our bodies and more to do with societal schedules. In fact, levels of testosterone

  • are much lower in the evening and peak at 8AM. While semen quality is best in the afternoon

  • with 35 x106 more spermatozoa per ejaculation. As such, couples hoping to conceive have better

  • chances with midday sex than during the midnight hour.

  • As you go to sleep and finally begin to drift off, melatonin is secreted by the pineal gland

  • which begins the sleep cycle, which happens multiple times through the night. A change

  • from alpha wave drowsiness to lower frequency theta brain waves signify early sleep. And

  • as your sleep deepens, your brain moves to longer delta waves. For children, sleep is

  • the time in which 90% of bone growth occurs.

  • Finally, as you move into REM sleep, your brain is as busy as it was during the day,

  • firing theta waves with burst of alpha and beta. Though dreams occur in all stages of

  • sleep, it is during REM that our dreams are most vivid and intense. Recent brain scans

  • have shown that neurotransmitters like serotonin, histamine and noradrenaline are shut off at

  • this point, turning off reason and logical sense of time - which explains some weird

  • dreams! We dream for an hour and half to two hours each night, meaning you spend about

  • 6 years vividly dreaming over your lifetime!

  • In the middle of the night, your body actually wakes up periodically, in something called

  • microarousals. These can last only seconds, but occur between 200-1000 times per night.

  • Though most of us in the western world sleep all in one go, many past cultures sleep was

  • broken up into two periods with social activity in between. Some studies have even shown that

  • we have two distinct 4 hour natural sleep periods, which in the past would last between

  • 8pm-12am, and then again from 2am-6am.

  • By 4:30am, your body temperature is at its lowest and your sleep continues to move through

  • the cycle. In a few hours, itll be good morning body! Time for another day :)

Good morning body! Time for another day. Your alarm goes off, you hit the snooze button

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B1 INT US sleep pm body body temperature afternoon brain

This Is Your Body Over 24 Hours

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    mmaacserati posted on 2015/08/29
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