Skip to page content Mission Information


SOdium LOading in Microgravity (ILSRA_2001_028)
Research Area:
Advanced environmental monitoring and control
Bone and calcium physiology
Renal, fluid and electrolyte physiology
Species Studied
Scientific Name: Homo sapiens Species: Human

SOdium LOading in Microgravity (SOLO) is a continuation of extensive research into the mechanisms of fluid and salt retention in the body during bed rest and space flights. During space flight, calcium and bone density loss is common among astronauts due to not weight bearing while in microgravity. Investigators aimed to study the relationship of sodium intake as it relates to increased calcium excretion and how bone density decreases in microgravity are made worse due to sodium retention.

++ -- View more

Sodium, dietary
Bone resorption

Photo Gallery
+ View digital images

Data Information
Data Availability
Archive is complete. No data sets are available for this experiment. Please Contact LSDA if you know of available data for this investigation.

Antidiuretic hormone (ADH)
Arginine vasopressin (AVP)
Atrial natriuretic peptide (ANP)
Bicarbonate (HCO3), base excess
++ -- View more

Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Expedition 17 04/08/2008 10/23/2008 198 days
Expedition 18 10/12/2008 04/17/2009 187 days
Expedition 19 03/26/2009 10/11/2009 199 days
Expedition 20 05/27/2009 10/11/2009 137 days
Expedition 23 03/18/2010 06/01/2010 75 days
Expedition 24 06/01/2010 09/25/2010 117 days
Expedition 25 09/24/2010 11/25/2010 31 days
Expedition 26 11/26/2010 03/16/2011 111 days
Expedition 27 03/14/2011 05/23/2011 70 days
Expedition 28 05/23/2011 09/15/2011 115 days
Expedition 29 09/16/2011 11/21/2011 40 days
Expedition 30 11/14/2011 04/27/2012 166 days
Expedition 31 04/27/2012 07/01/2012 65 days
Expedition 32 07/01/2012 09/16/2012 78 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
Proposal Source