Those who fly on long distance flights are used to what is called jet lag, but did you know there is also what is known as cruise lag?
Jet lag happens when you cross at least two time zones and it affects sleep when the internal biological rhythm is disrupted. Those who go on a cruise can also suffer from jet lag if they have to fly a long way to join the ship, such as from the United States to Europe for example. In order to minimize jet lag, you should try and anticipate the jet lag by going to bed earlier and waking up earlier if you are going eastbound, and the reverse if traveling west bound. When you arrive on board the ship try and stay awake until the local bedtime and spend time outdoors in the sun as that helps to regulate the biological clock. Also ensure you drink plenty of non alcoholic fluids as dehydration makes jet lag worse.
However, when you return from your cruise you could find yourself to be one of those people who suffer from cruise lag, which has several effects.
The first is a sensation of being dizzy or wobbly and it is called land sickness and can happen when you have been moving for a long period of time, such as on a cruise. The sensation is caused for the same reason as people feel sea sick as it is mixed signals from the eyes and the inner ear. Even though you get off the ship, your inner ear expects there still to be motion but your eyes know you are on land. In most cases it goes away after a few hours or a few days, but for some people it lasts for weeks or even years and for those it is called the Mal de Debarquement syndrome which means feeling ill from leaving a ship. Those most likely to suffer are women between the ages of 40 and 50 and the only way to relieve the symptoms is to be in motion again, either on a car or a ship.
Another element of cruise lag could also be that the body has become used to certain foods and drinks and will continue to crave these even when on land. This can include more caffeine, more alcohol, more food throughout the day and especially sweet things. Try and get back into your normal routine as quickly as possible but there is no need to go completely cold turkey instead slowly reduce the frequency of snacking and the amount of caffeine and alcohol over a few days or a week.