Additional knowledge of energy intake requirements during space flight is needed to maintain the health of long-duration crewmembers, to ensure high performances and the overall success of a mission, but also to ensure adequate, but not excessive cargo allotments for food. In this regard, the determination of energy requirements as a function of exercise load is a clear pre-requisite to any planed long-term manned space flight.
Astronaut's Energy Requirements for Long-Term Space Flight (Energy) will measure changes in energy balance after long term spaceflight, adaptations in the components of the total energy expenditure and derive an equation for the energy requirements of astronauts.
Ten days after the measurement day, two additional void samples are requested from the subject, preferably from two consecutive voids.
The Baseline Data Collection (BDC) can be scheduled anytime between L-4 months and launch. The subjects should not have large deviations in their body mass (±5%) in the period from BDC to launch. The BDC data are valid for 6 months. It is preferable during the 11 days of the BDC to stay within the same geographical region (continent).
Energy in-flight data collection should be scheduled with crewmembers staying in orbit for four months or longer. The data collection should be scheduled no earlier than three months into the mission, and at least three weeks prior to landing. This 4-week limit is chosen to avoid confounding effects of the increased countermeasure programs at the end before landing.
The astronauts total energy expenditure will be measured by the DLW method, and by indirect calorimetry. In addition, body composition will be measured through hydrometry. The in-flight and preflight protocols will be conducted over a 10-day period, starting with the main measurement day. The day before the measurement day the experiment hardware is set up and the standardized meals will be consumed. Those meals will be of similar macronutrient composition and energy content and will be based on individual’s body mass.
At the start of the measurement day, intake of the DLW and a urine sampling are performed. During the measurement day, two sessions of 45 min and 4 hours of physical rest will be required during which OU is measured using the Pulmonary Function System (PFS). The 45-minute measurement period is scheduled approximately 45 minutes after the DLW intake. Then a standardized breakfast is consumed and the 4 hour session starts. This session contains continuous online OU measurements by the PFS, paused only by void samplings and 10 minute breaks for comfort. Over the following nine days, a series of void and water samplings are scheduled for every other day and the activity monitor is worn continuously.
Results for this investigation are unavailable. This is an international experiment. NASA does not currently have an agreement with international space partners to archive their data in the LSDA.
|Mission||Launch/Start Date||Landing/End Date||Duration|
|Expedition 32||07/01/2012||09/16/2012||78 days|
|Expedition 34||11/18/2012||03/15/2013||117 days|
|Expedition 35||03/15/2013||05/13/2013||58 days|
|Expedition 36||05/13/2013||09/10/2013||166 days|
|Expedition 37||09/10/2013||11/10/2013||61 days|
|Expedition 38||11/10/2013||03/10/2014||120 days|
|Expedition 40||05/13/2014||09/10/2014||133 days|
|Expedition 41||09/10/2014||11/09/2014||29 days|
|Expedition 44||06/10/2015||09/11/2015||93 days|
|Expedition 45||09/11/2015||12/11/2015||91 days|
|Expedition 46||12/11/2015||03/02/2016||82 days|
|Expedition 47||03/02/2016||06/18/2016||108 days|
|Expedition 48||06/18/2016||09/06/2016||80 days|
|Expedition 49||09/06/2016||10/30/2016||54 days|
|Expedition 50||10/28/2016||04/09/2017||164 days|
|Expedition 51||04/09/2017||06/02/2017||55 days|
|Expedition 52||06/02/2017||09/02/2017||92 days|
|Expedition 53||09/02/2017||12/14/2017||102 days|