Too much cortisol and adrenalin can result in physical problems and changes that lead to stress-related sickness.

VOA: special.2009.03.24

Her main goal was to increase public interest in the difficulties of people with physical problems.

VOA: special.2009.11.15

But physical sickness can hide deeper problems.

VOA: special.2010.04.13

The Mars-500 mission at Moscow's Institute of Biomedical Problems will test the psychological and physical effects of long-term isolation on humans.

VOA: standard.2010.06.02