1. Cortisol Boost: After waking up, get natural light in your eyes for 5-10 min, for the cortisol boost (sets alertness, focus, mood), also dopamine (drive hormone, not pleasure hormone, even helps in releasing adrenaline) 2:50
2. Clearing 'tiring' Adenosine: Caffine (delayed) and Exercise helps clear out adenosine (waste product of brain, makes feel tired, turns on the parasympathetic nervous system, gets cleared out during sleep and early sleepy state) 7:15
9:30 temperature rise leads to wake up
3. Temperature increase: The goal is to increase body temperature to wake up and decrease body temperature to fall asleep. Both cold shower and exercise helps in that 10:57
Surface temperature down => core body temperature up 11:30
All of these combine into releasing of the right hormones (adrenaline, dopamine, cortisol), to feel more alert and lively like a summer morning.