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Data Set Name Astronaut-Reported Levels of Physical Activity
Data Set Description To assess the activity level within the LSAH population, information from the LSAH Health Lifestyle Questionnaire (LSQ) was compiled and compared with data from the 1990 National Health Interview Survey (NHIS).

Source: National Aeronautics and Space Administration. Physical Activity for a Healthy Lifestyle. In: Longitudinal Study of Astronaut Health Newsletter. November 2000;9(2):1-2.

Level of Processing Summarized - Microsoft Excel
Data Files [Available online]
Physical activity level
Data Collection Site(s) NASA Johnson Space Center (JSC) Flight Medicine Clinic
Data Source Project
Data Set Review or Technical Comments
Measurement or Analysis Technique
Information from the NHIS was gathered from 22,760 noninstitutionalized U.S. civilians at least 18 years of age. NHIS participants were divided into four basic categories based on the intensity, frequency, and duration of physical activity: Sedentary, Irregular, Moderate, and Vigorous. Sedentary indicates no leisure activity, Irregular indicates leisure activity that does not meet the current public health recommendation. Moderate refers to activities with an intensity of 3 to 6 METs performed a minimum of 30 minutes at least five days per week. Vigorous refers to activities with an intensity of greater than 6 METs performed a minimum of 20 minutes at least 3 days per week.

The LSQ was developed in 1993 to collect essential data on NASA astronauts and LSAH comparisons. Two hundred twenty out of 272 astronauts and 780 out of 889 comparisons have completed this questionnaire. The physical activities of LSAH participants were categorized according to the NHIS definitions; however, their data were gathered using different time intervals, so both Moderate and Vigorous categories refer to activities performed a minimum of 20 minutes. Walking was categorized as a Moderate activity. Since the number of METs of an activity refers to the intensity with which it is performed, the assumption is made that the remaining activities listed on the LSQ were performed in a vigorous, energetic manner. These activities are running, swimming, bicycling, weight lifting, skating, aerobics/dancing, racquet sports, rowing, and other organized sports.

Responsible NASA Official The NASA representative responsible for providing this information is:
Johnson Space Center LSDA Office
Project Manager: Jessica Keune