The research on the Qantas passengers is designed to answer three central questions:

• How does their sleep, cognitive ability, sleepiness and mood change on an ultra-long-haul flight?
• How quickly do they adapt to the destination’s time zone?
• Do the changes to the in-flight routine actually improve passenger experience?

For one of them, logistics worker Greig Roberts, taking the trip will be a chance to learn how to deal better with jet lag, which can knock him about for days after a long flight.

“That is the appeal for me,” he said in an interview at the briefing. “If you can arrive feeling fresh and buzzing, that can be very productive.”

--With assistance from Alex Millson.

This article was provided by Bloomberg News.

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