(CNN) – Our biological clock has a way of regulating how alert and how sleepy we get over a 24-hour period.
Because that cycle can change as we age, working at certain times of the day or night can jeopardize your health.
According to Dr. Jess Shatkin, a psychiatrist at New York University, adolescents tend to go to bed later and wake up later, because they release melatonin – a hormone linked to our biological clock – later in the night than adults do.
Shatkin says young adults shouldn’t start school or work earlier than 9:00 or 10:00am.
Studies show the best type of work schedule for people in this group should reflect the person’s lifestyle preferences, whether an early bird or night owl.
Deviating from a regular schedule can have a negative impact on health.
A study published by the Melbourne institute suggests that a three-day workweek could be best for adults over 40.
Researchers also found that working about 25 hours a week can improve cognitive performance, but working more than 25 hours can have the opposite effect.