Latest / Rest to Rise The Science of Sleep / Episode 2 - The Internal Clock Sunlight, Melatonin, and Temperature Control

Transcript

Episode 2 - The Internal Clock Sunlight, Melatonin, and Temperature Control · Rest to Rise The Science of Sleep

• 0:00
  Speaker 1: Episode 2, The Internal Clock Sunlight, Melatonin, and Temperature Control.
• 0:06
  Speaker 1: Hello and welcome back to Rest to Rise. It is
• 0:10
  Speaker 1: fantastic to have you with me for Episode 2. Today,
• 0:14
  Speaker 1: we are exploring the master conductor of your physical health, mood,
• 0:19
  Speaker 1: and sleep timing, your biological circadian rhythm. Inside your brain,
• 0:26
  Speaker 1: located within a small cluster of neurons called the suprachiasmatic nucleus,
• 0:32
  Speaker 1: sits a master 24-hour biological clock. This internal timer regulates
• 0:39
  Speaker 1: your body temperature, hormone production, digestion, mental alertness, and sleep
• 0:45
  Speaker 1: cycles around the solar day. In our modern world, Most
• 0:50
  Speaker 1: people live in severe conflict with their internal biological clock.
• 0:56
  Speaker 1: They spend their days indoors, under dim artificial lighting, exposed
• 1:01
  Speaker 1: to minimal natural sunlight, and spend their evenings under bright
• 1:05
  Speaker 1: overhead LED lights and smartphone screens. This artificial environment creates
• 1:12
  Speaker 1: circadian misalignment. Your master clock loses track of whether it
• 1:18
  Speaker 1: is day or night, leading to daytime tiredness, evening insomnia,
• 1:23
  Speaker 1: digestive issues, and poor sleep quality. To restore your biological clock,
• 1:30
  Speaker 1: you must understand the two primary levers that program your
• 1:34
  Speaker 1: master timer, light exposure and core body temperature. Lever number
• 1:39
  Speaker 1: one is morning sunlight exposure. Sunlight is the primary environme, ental, signal,
• 1:47
  Speaker 1: or zeitgeber that sets your biological clock every single day.
• 1:53
  Speaker 1: When bright natural sunlight hits your retina in the morning,
• 1:57
  Speaker 1: specialized neural cells signal your master clock to initiate three
• 2:03
  Speaker 1: critical biological events. It triggers an immediate spike in cortisol,
• 2:09
  Speaker 1: to boost alertness, starts a timer for the evening release
• 2:13
  Speaker 1: of melatonin, and elevates your core body temperature. Make it
• 2:18
  Speaker 1: a non-negotiable daily habit to view natural outdoor sunlight within
• 2:23
  Speaker 1: 30 to 60 minutes of waking up. Spend 5 to
• 2:27
  Speaker 1: 10 minutes outside without sunglasses on clear days, or 10
• 2:32
  Speaker 1: to 20 min, utes on cloudy days. This single morning
• 2:36
  Speaker 1: habit dramatically improves evening sleep latency and daytime focus. Lever
• 2:43
  Speaker 1: number two is managing evening light and core body temperature.
• 2:48
  Speaker 1: To fall asleep smoothly, your brain requires two clear biological signals,
• 2:55
  Speaker 1: a rise in the hormone melatonin and a drop in
• 2:59
  Speaker 1: core body temperature by roughly one degree Celsius. In the evening,
• 3:04
  Speaker 1: artificial overhead lighting and blue screen light trick your brain
• 3:09
  Speaker 1: into believing it is still daytime, suppressing melatonin production and
• 3:14
  Speaker 1: delaying sleep onset. Two hours before bedtime, dim your household lights,
• 3:21
  Speaker 1: switch to warm lamp lighting, and limit bright screen exposure.
• 3:26
  Speaker 1: To facilitate the necessary drop in core body temperature, Keep
• 3:31
  Speaker 1: your bedroom cool, ideally around 18 degrees Celsius. Taking a
• 3:36
  Speaker 1: warm bath or shower 60 minutes before bed also helps
• 3:41
  Speaker 1: by drawing internal heat to your skin's surface, allowing your
• 3:45
  Speaker 1: core body temperature to dump rapidly afterward. By anchoring your
• 3:51
  Speaker 1: morning with bright sunlight, dimming evening lights, and keeping your
• 3:55
  Speaker 1: bedroom cool, you program your circadian clock for deep. Effortless Sleep.
• 4:01
  Speaker 1: Thank you for tuning in to Episode 2, Step Outside
• 4:05
  Speaker 1: for Natural Sun Lig, Tea Tomorrow Morning. In Episode 3,
• 4:10
  Speaker 1: we will explore sleep hygiene protocols and evening wind-down rituals.
• 4:16
  Speaker 1: See you there!