Task Maximal Oxygen Uptake (VO2max) and Submaximal Estimates of VO2max Before, During and After Long Duration International Space Station Missions (Completed)
Last Published:  07/30/21 01:05:34 PM (Central)
Short Title: VO2 Max
Responsible HRP Element: Human Health Countermeasures
Collaborating Org(s):
Funding Status: Completed - Task completed and produced a deliverable
Procurement Mechanism(s):

Maximum oxygen uptake (VO2max) is the standard measure of aerobic capacity and is directly related to the physical working capacity of an individual.

The specific aims of this evaluation are:

  1. To measure VO2max during and following long duration missions and to assess the validity of using submaximal measurements of heart rate (HR), oxygen consumption (VO2)
  2. To track changes in aerobic capacity non-invasive measurements of cardiac output (Qc) will be performed during exercise to determine if measurement of Qc will improve the accuracy of the submaximal estimations of VO2max.
For this proposed evaluation, crew members participating in ISS missions of ≥ 90 days will perform graded cycle exercise tests to their volitional maximum effort prior to, every 30 days during, and following flight.  Measurements obtained during these tests will include HR, VO2 and Qc.  During these tests, ECG will be monitored real-time as a safety precaution.  Expected results from this evaluation will include accurate VO2max measurements from astronauts participating in long duration space flight and observation of the pattern of change across mission duration.  Additionally, the evaluation will allow NASA to determine if submaximal exercise testing data will provide results that allow accurate estimation of the crewmembers’ aerobic capacity status during and after space flight.