Stress and sleepless nights

From Toronto, at the 82nd annual meeting of the Endocrine Society

Insomnia is associated with increases in stress hormones. This boost persists all day and night, a research team reports.

The scientists, including George P. Chrousos of the National Institutes of Health in Bethesda, Md., convinced 11 insomniacs and 13 young men and women without sleep problems to spend 4 consecutive nights in a sleep laboratory.