Fatigue shown by alien left in E-Type?

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Possible Answers:

jet lag.

Last seen on: The Sun – Two Speed Crossword – Jan 22 2019

Random information on the term “jet lag”:

Delayed sleep phase disorder (DSPD), more often known as delayed sleep phase syndrome and also as delayed sleep-wake phase disorder, is a chronic dysregulation of a person’s circadian rhythm (biological clock), compared to those of the general population and societal norms. The disorder affects the timing of sleep, peak period of alertness, the core body temperature rhythm, and hormonal and other daily cycles. People with DSPD generally fall asleep some hours after midnight and have difficulty waking up in the morning.[1] People with DSPD probably have a circadian period significantly longer than 24 hours.[2] Depending on the severity, the symptoms can be managed to a greater or lesser degree, but no cure is known, and research suggests a genetic origin for the disorder.

Affected people often report that while they do not get to sleep until the early morning, they do fall asleep around the same time every day. Unless they have another sleep disorder such as sleep apnea in addition to DSPD, patients can sleep well and have a normal need for sleep. However, they find it very difficult to wake up in time for a typical school or work day. If they are allowed to follow their own schedules, e.g. sleeping from 4:00 am to 1:00 pm, their sleep is improved and they may not experience excessive daytime sleepiness.[3] Attempting to force oneself onto daytime society’s schedule with DSPD has been compared to constantly living with jet lag; DSPD has, in fact, been referred to as “social jet lag”.[4]

jet lag on Wikipedia