Since the beginning of August, NASA's Mars rover Curiosity has been roaming all over the distant planet learning as much as it can about the Martian terrain. The mission control team back on Earth has also learned what it may be like on Mars by trying to live and work on a Martian day, which is about 40 minutes longer than an Earth day.
This "day" length causes havoc with the internal 24-hour body clock but researchers at Brigham and Women's Hospital (BWH) have developed and tested a fatigue management program which is successful at controlling this space-age jetlag.
Mission controllers investigating the Martian landscape are required to communicate with the rover on Martian time.
This unusual schedule poses a great challenge as our internal body clock has evolved to expect a 24-hour light-dark, not a 24.65 h 'day', making it difficult to sleep, wake and work.
"Our study, which was conducted during the Phoenix Mars Lander mission, investigated the effectiveness of a pilot program to educate the mission personnel on how to reset their body clocks more quickly and how to improve their sleep, alertness and performance," Steven W. Lockley, senior investigator on the study, said.
The research team studied 19 scientific and technical personnel supporting the Phoenix Lander mission for more than 11 weeks.
The participants were assessed using a sleep/work diary, continuous wrist actigraphy, and regular performance tests. A subset of the study participants were also given portable blue-light light boxes to place at their workstations to help reset their internal body clocks and improve their performance.
They researchers found that most of the participants were able to synchronize to a Martian day schedule.
"While adapting the human sleep-wake and performance cycle to a 24.65 hour day is a substantial challenge, our study has provided the foundation to develop comprehensive fatigue management programs for future missions, which may eventually include manned missions to Mars," Laura Barger, principal investigator of the study, said.
"Such a program could decrease the risk of fatigue-related mistakes during these high profile and expensive missions," she added.
The study will be published in the journal Sleep.