From Fortune:

Many studies show that working on screens after dark has a negative impact on the brain. As a result, human bodies with access to constant light suffer long-term effects. The use of screens, especially in the evening, has pro-depressive effects and impacts the dopamine system. Humans have not evolved in line with the technology they create.

Communities with little to no access to electricity serve as a contrast to the current state of human sleep-wake behaviors. “Night owl” or “early bird” psychology is irrelevant in communities without electricity. Screening before bedtime, is difficult to stop, and has addictive properties that impact health directly. For example, an athlete’s performance for a following day can be predicted from their sleep the previous night.

A principal scientist reveals her own regimen: the regular time she goes to bed and gets up that began in 2017 has kept her healthy. Light trumps any individual’s sleep-wake signals, and screen time before sleep is hard to stop. One example of how critical a stable relationship with light is: her sleep time has correlated with her performance parameters and affected her resistance to illness.



Read more: WHOOP scientist Kristen Holmes says screentime between 10pm-4am could have depressive effects