Not exact matches
In a study of preterm infants kept in hospital wards, babies exposed to natural lighting patterns — brighter
during the day, darker
during the
night — adapted to the 24 -
hour cycle more quickly than those exposed to constant, low
levels of light (Rivkees et al 2004).
We also know that melatonin is present at low
levels during the day, begins being released a few
hours before bedtime and peaks in the middle of the
night.
Levels of CONSTANS mRNA start rising about 12
hours after dawn, remain high throughout the
night, then drop
during the day.
# 6 If you have problems with waking
during the early
hours of the morning, have a small protein snack just before bed to ensure consistent blood sugar
levels throughout the
night.
One meta - analysis of nearly 700 published studies showed that both adults and children who are short sleepers have an increased risk of obesity.1 In a different study, 12 men were allowed a full
night of sleep (8
hours) followed by a partial
night of sleep (4
hours); after the latter, the men were hungrier upon waking up and ate more
during the day (22 %).2 Acute partial sleep leads to increased serum
levels of ghrelin (a hunger hormone) and decreased
levels of leptin (a satiety hormone).
Before breakfast your body is forced to burn fat for energy, as glucose
levels are depleted following 6 to 10
hours of fasting
during the
night.
When you consistently don't get enough sleep (i.e. 7 - 8
hours per
night) or enough quality sleep (i.e. waking up several times
during the
night, trouble falling asleep, trouble going back to sleep if you wake up), cortisol
levels in your body rise.
The logic that most people use here is that since activity
level and metabolic rate decrease in the late
night hours, calories consumed
during this period will be more likely to be stored as fat.