Skip to page content Mission Information


Astronaut's Energy Requirement for Long-Term Spaceflight (ILSRA_2004_144)
Principal Investigator
Research Area:
Metabolism and nutrition
Species Studied
Scientific Name: Homo sapiens Species: Human

Loss of body mass commonly occurs during long-duration space flight. One explanation for the loss in body mass is the decrease of skeletal muscle use. It is also expected that the systematic ongoing negative energy balance observed in flight contributes significantly to such a loss. However, the reason for the imbalance between energy intake and energy output is not clear.

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.

++ -- View more

Data Information
Data Availability
Archiving in progress. Data is not yet available for this experiment.

Body mass
Energy balance
Energy expenditure

Mission/Study Information
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

Additional Information
Managing NASA Center
Johnson Space Center (JSC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Pamela A. Bieri
Institutional Support
European Space Agency (ESA)
Alternate Experiment Name