About Me
A world authority on the cardiovascular health effects of spaceflight and how these changes parallel consequences of aging. In scientific literature and in radio, television, print and internet media he has described how dramatic reductions in physical activity and the absence of daily adaptations to gravity with spaceflight or bed rest impact regulation of arterial blood pressure and brain blood flow, and accelerate arterial stiffening. His work promotes the benefits of physical activity as a primary intervention to slow the impact of age on vascular and cerebrovascular health.