Updated: Jun 22, 2021
The body has a natural daily cycle of hormones, know as the circadian rhythms.
The sleep-wake cycle is an important part of ensuring that the different processes of the body occur at certain points during the day. Cortisol levels increase in the morning to get us up and ready for the day.
Your job, daily habits, travelling across time zones, sleep, stress and exercise all have an impact on your circadian rhythm..