NASA Occupational Medicine policy is to minimize sick absences and reduced productivity due to marginal physical disability, permanent disability, or premature death. This is accomplished by providing to employees Physical Fitness Programs to help control and reduce health risk factors, such as sedentary lifestyle, obesity, high blood pressure, and diabetes, and also, by offering post-cardiac and post-injury rehabilitation services.

Check the following links for more information:

http://ohp.nasa.gov/disciplines/fitness/index.html


Exercise in Space: 'Out of this World Workout - The Role of Exercise in Space

Human Physiology Research and the ISS: Staying Fit Along the Journey | Unabridged