You don’t have to accept fatigue and sleeplessness as the cost of traveling to distant lands. There are a half a dozen things you can do to lessen the impact of crossing time zones.
I know someone who will be going through 7 time zones and then one day later will be traveling again but only go through 1 time zone. Will this person be ok? Will this person have been able to recuperate before going on the next trip or does it really matter?