Skip to page content Mission Information


Thermoregulation in Humans during Long-Term Space Flight (Thermolab)
Principal Investigator
Research Area:
Cardiovascular physiology
Species Studied
Scientific Name: Homo sapiens Species: Human

This experiment investigated the circadian rhythm of core temperature and the thermoregulatory and cardiovascular adaptations during rest and exercise in the course of a long-term microgravity exposure on the International Space Station (ISS). The data derived might be important not only to understand human adaptation in space in view of the thermoregulatory and cardiovascular system, but as well as associated to problems dealing with body weight loss and de-synchronization of internal rhythms which affect the overall health and performance of astronauts/cosmonauts.

Measuring core body temperature is not straightforward because a thermometer must be placed close to the heart for best results. Many types of thermometers exist, from the type that goes under the tongue to the type that goes into the ear, but unfortunately the most accurate way of reading a core temperature is inserting a thermometer in the rectum. Body temperature tends to be lower in the feet and lowest in the early morning hours between four and six.

++ -- View more

Exercise test
Body composition

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.

Body mass
Body water content
Body weight
Circadian rhythm
Heat balance
++ -- View more

Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Expedition 21 10/11/2009 12/01/2009 51 days
Expedition 22 11/30/2009 03/18/2010 109 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: Jessica Keune
Institutional Support
European Space Agency (ESA)
Proposal Source