Editing Jet lag (section)

===Risk Factors===
Jet lag has a stronger impact when crossing more time zones over a few days. If someone has had jet lag before, then they are likely to have it again. Additional factors include arrival time, age, stress levels, sleep before travel, and use of caffeine or alcohol. Those over the age of 60 are more sensitive to circadian rhythm changes. The chances of jet lag increase with less sleep before a flight and higher stress levels.<ref>{{cite journal |last1=Herxheimer |first1=Andrew |title=Jet lag |journal=BMJ Clinical Evidence |date=29 April 2014 |volume=2014 2303|pmid=24780537|pmc=4006102 }}</ref>

Additionally, insufficient sleep before a flight can exacerbate jet lag symptoms. A well-rested state prior to travel helps the body adapt more efficiently to new time zones.<ref>{{cite journal |last1=Weingarten |first1=Jeremy A |title=Air Travel: Effects of Sleep Deprivation and Jet Lag |journal=Chest |date=2013 |volume=144 |issue=4 |pages=1394–1401 |doi=10.1378/chest.12-2963|pmid=24081353 }}</ref> 
High stress levels can also disrupt the body's natural rhythms, making it more difficult to adjust to a new time zone. Stress-induced hormonal changes may interfere with sleep quality and circadian alignment.<ref>{{cite journal |last1=Arendt |first1=J |title=Physiological Changes Underlying Jet Lag |journal=British Medical Journal (Clinical Research Ed.) |date=1982 |volume=284.6310 |issue=6310 |pages= 44–46 |doi=10.1136/bmj.284.6310.144|pmid=6275937 |pmc=1495508 }}</ref> 
Personal factors such as [[chronotype]] (morningness or eveningness preference), genetic predispositions, and overall health can affect how one experiences jet lag. For instance, individuals with a natural tendency to stay up late may find it easier to adjust to westward travel.<ref>{{cite journal |last1=Juda |first1=M |title=Chronotype Modulates Sleep Duration, Sleep Quality, and Social Jet Lag in Shift-Workers |journal=Journal of Biological Rhythms |date=2013 |volume=28 |issue=2 |pages=141–151 |doi=10.1177/0748730412475042|pmid=23606613 }}</ref>