11:02 15/05/2026
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Nguồn tham khảo
  1. Bryan, L. (2025, July 23). Circadian rhythm. Retrieved from https://www.sleepfoundation.org/circadian-rhythm
  2. News-Medical. (2026, January 2). How morning routines influence cognitive performance, mood, and circadian rhythm. Retrieved from https://www.news-medical.net/health/How-Morning-Routines-Influence-Cognitive-Performance-Mood-and-Circadian-Rhythm.aspx
  3. Your Sleep/Wake Cycle | NHLBI, NIH. (2022, March 24). Retrieved from https://www.nhlbi.nih.gov/health/sleep/sleep-wake-cycle
  4. Clinic, C. (2025, February 20). The health benefits of sunshine (and how much you need per day). Retrieved from https://health.clevelandclinic.org/how-much-sunshine-you-need-daily
  5. Hughes, L. (2017, March 2). 5 morning habits health experts swear by. WebMD. Retrieved from https://www.webmd.com
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