Fatigue Countermeasure Program in Operational Flight Controllers
The purpose of this study is to validate the acceptability, operational feasibility and efficacy of a combined fatigue countermeasure comprised of shorter-wavelength light and exercise during operational Orbit 1 night shifts to improve alertness and performance of flight mission controllers.
Specifically, the investigators will:
- Feasibility. Test the feasibility of developing a break room containing fatigue countermeasures (shorter-wavelength light and exercise equipment) to be used by flight mission controllers during Orbit 1 night shifts, and the feasibility to schedule regular breaks during the Orbit 1 shift so that flight mission controllers have the opportunity to use the fatigue countermeasures break room.
- Acceptability. Test the acceptability of the use of the fatigue countermeasures break room evaluating when and how the room is used by flight mission controllers, as measured on End-of-Shift Productivity Questionnaire.
- Test the hypothesis that alertness and performance will be impaired in flight mission controllers during Orbit 1 operational night shifts as compared to flight mission controllers working a non-console day shift.
- Test the hypothesis that alertness and performance of flight mission controllers who exercise and are exposed to shorter wavelength light during the Orbit 1 night shift will be significantly more alert and have better mood, performance (e.g., less PVT lapses, increased productivity) than those same mission controllers working Orbit 1 night shifts without exposure to the shorter wavelength light and exercise.
- Test the acceptability, operational feasibility and efficacy of implementing an anonymous sleep disorders screening for flight controllers, evaluated by number of visitors to the screening web site and the number of completed assessments.
|Fatigue||Behavioral: blue-wavelength enriched ceiling light Behavioral: mild exercise|
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
|Official Title:||Experimental Trial of Fatigue Countermeasure Program in Operational Flight Controllers|
- Alertness/Fatigue as measured by Psychomotor Vigilance Task and Visual Analog Scales [ Time Frame: Three weeks. ]
- Sleep duration as measured by wrist actigraphy [ Time Frame: Three weeks. ]
- Sleep duration as captured in sleep/work logs [ Time Frame: Three weeks. ]
|Study Start Date:||September 2012|
|Study Completion Date:||November 2012|
|Primary Completion Date:||November 2012 (Final data collection date for primary outcome measure)|
Experimental: Access to experimental break room
Subjects will visit the experimental break room 4 times per Orbit 1 shift:
In the break room, subjects will be passively exposed to blue-wavelength enriched ceiling lights during all four visits for each work shift.
Also in the break room, subjects will perform 10-minutes of mild exercise during the first three visits to the break room during each work shift.
Behavioral: blue-wavelength enriched ceiling light
Subjects will be in the experimental break room for four 20-minute periods for each Orbit 1 work shift.
Other Name: Sylvania Fluorescent Octron FO32/SKYWHITE/XP/ECO 8000KBehavioral: mild exercise
Subjects will be asked to achieve 65% of maximum heart rate on either a treadmill or exercise cycle for 10-minutes, three times during each Orbit 1 work shift.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01744678
|United States, Texas|
|Johnson Space Center|
|Houston, Texas, United States, 77058|
|Principal Investigator:||Charles A Czeisler, PhD, MD||Brigham and Women's Hospital / Harvard Medical School|
|Study Director:||Laura K Barger, PhD||Brigham and Women's Hospital / Harvard Medical School|