"The Psychology of Waking Up Grumpy"

A study by the University of Michigan and Dartmouth Health using Fitbit data from over 2,500 medical interns found that mood follows a rhythm connected to the body's internal clock, with the lowest point nearing 5 a.m. and the highest around 5 p.m. Lack of sleep intensified mood swings, leading to worse moods and bigger changes throughout the day. The study highlights the significant role of the body's clock in mood and introduces wearable technology as a new way to explore mental health issues. The researchers suggest that noninvasive tools like Fitbits could be useful in tracking mood disorders and circadian rhythms in everyday clinical practice.