Astronaut's Energy Requirements for Long-Term Space Flight (Energy) - 10.04.17

Overview | Description | Applications | Operations | Results | Publications | Imagery

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Science Objectives for Everyone
Energy investigation measures an Astronaut's Energy Requirements for Long-Term Space Flight, a crucial factor needed for sending the correct amount of the right types of food with space crews. Nine astronauts will be examined during exercise and rest cycles three months before launch, three months after arriving at space station and adapting to the space environment, and after return to Earth. Physicians will measure metabolic rates, urine content, and bone density to determine energy needs.
Science Results for Everyone
Information Pending

The following content was provided by Stephane Blanc, Ph.D., and is maintained in a database by the ISS Program Science Office.
Information provided courtesy of the Erasmus Experiment Archive.
Experiment Details

OpNom: Energy

Principal Investigator(s)
Stephane Blanc, Ph.D., Institut Pluridisciplinaire Hubert Curien, Strasbourg, France

Alexandre Zahariev, Centre d'Ecologie et de Physiologie Energetiques, Strasbourg, France
M. Caloin, France

Centre d'Ecologie et Physiologie Energetiques, Strasbourg, France

Sponsoring Space Agency
European Space Agency (ESA)

Sponsoring Organization
European Space Agency

Research Benefits
Earth Benefits, Scientific Discovery, Space Exploration

ISS Expedition Duration
May 2012 - March 2016; March 2016 - February 2018

Expeditions Assigned

Previous Missions
Information Pending

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Experiment Description

Research Overview
• With the construction of the International Space Station and the related planned long-term human missions beyond low Earth orbit, the interest in nutrition as a countermeasure to the effects of space flight has increased dramatically. A growing body of data suggests a direct relationship between nutrition and the effects of space.
• The maintenance of energy balance appears critical but difficult during space flight. Clearly the determination of energy requirements is necessary for recommending healthy nutrition in weightlessness.
• Astronaut's Energy Requirements for Long-Term Space Flight (Energy) measures 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.

Astronaut's Energy Requirements for Long-Term Space Flight (Energy) determines the crew members energy requirements for long-term space flight. There is no compensation for severe negative energy balance during space flight.. This energy deficit affects all physiological functions. Energy measures changes in energy balance after long-term space flight, adaptations in the components of the total energy expenditure, and help to derive an equation for the energy requirements of crew members.

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Space Applications
Astronauts often lose body mass with extended stays in space for reasons that remain unclear, although increased exercise as a microgravity countermeasure may be a factor. Knowing details of astronaut metabolism and activity, combined with other conditions, will help ensure that crews are properly nourished on long missions.

Earth Applications
Extended bed rest due to age or illness has some parallels to a proper energy balance. Improved understanding from space missions will help in assessing patient needs on Earth.

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Operational Requirements and Protocols
• A total of 9 male subjects are needed to complete the Energy investigation. For some subjects control subjects will be doing parallel urine collection.
• Energy will utilize several dedicated meals (2 breakfast meals, 1 lunch and 1 dinner) for the inflight portion of the investigation.
• Energy utilizes the HRF-2/PFS instrument.
• Preflight measurements shall be done anytime between L-5 months and launch and remain valid for 6 months. The subjects should not have large deviations in their body mass (±5%) in the period from BDC to launch. Preflight measurements consists of 1 day of measurements and urine collection. A body mass measurement and a Dual Energy X-ray Absorptiometry (DEXA) scan occurs before launch. Inflight after L+3 months, and more than 3 weeks before return, a Pulmonary Function System (PFS) measurement, resting metabolic rate (45 minutes), diet induced thermogenesis (4 hours), and urine and water sampling are performed. Post-flight body mass measurement between R+2 and R+7. Except that,no Energy postflight data collection is planned, all data requirements will be obtained from Space Medicine via data sharing.

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Decadal Survey Recommendations

Information Pending

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Results/More Information

This is the first mission incorporating Energy operations.

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Results Publications

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Ground Based Results Publications

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ISS Patents

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Related Publications

    Bergouignan A, Momken I, Schoeller DA, Normand S, Zahariev A, Lescure B, Simon C, Blanc S.  Regulation of energy balance during long-term physical inactivity induced by bed rest with and without exercise training. Journal of Clinical Endocrinology and Metabolism. 2010 March; 95(3): 1045-1053. DOI: 10.1210/jc.2009-1005.

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Related Websites

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image NASA Image: ISS033E010000 - Japan Aerospace Exploration Agency astronaut Aki Hoshide,Expedition 33 flight engineer,conducts an Oxygen Uptake Measurement (OUM) for the ESA experiment ENERGY in the Columbus laboratory of the International Space Station. A G1s camcorder is visible in the in upper left corner .
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image NASA Image: ISS031E031822 - An open can of food floats near the Energy (Astronaut's Energy Requirements for Long-Term Space Flight) experiment Food Kit.
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image NASA Image: ISS037E004951 - ESA astronaut Luca Parmitano participating in the Energy investigation.
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image NASA Image: ISS031E031829 - ESA astronaut Andre Kuipers poses for a photo with an open can of food from the Energy experiment.
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image NASA Image: ISS050E055526 - Flight Engineer and ESA astronaut Thomas Pesquet participates in the Oxygen Uptake Measurements as part of the Energy investigation.
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