Needless to say, it can be quite disruptive to live this way for long. For most people, readjusting, or ‘entrainment’ takes about one day per hour shifted. The recovery process can be sped up by exposure to bright light, but only if that exposure occurs at the right times. So, how does one know what those times are? Wouldn’t it be great if there were an app for that?
Enter Kirill Serkh of Yale University and Daniel Forger from the University of Michigan. They created a mathematical model for optimally scheduling anti-jet lag light periods. Then Olivia Walch made it an app:
To follow the apps recommendations, a person should experience one block of light and one block of darkness per day (and they should be very bright and very dim respectively) starting and ending at specified hours. For example, the app might tell the person to turn on the lights at 5:00 am and turn them off 7:20 pm. If you follow the recommendations, you should be able to knock a couple of days off your recovery time.