It has since been a standard tool in the study of biological rhythms.

We humans don't like that; it doesn't match our biological rhythm.

Most diseases today are diagnosed and treated without regard to biological rhythms.

Students also identified with, and tended to share, its nocturnal biological rhythm.

Others have learned how to manipulate their biological rhythms.

He had to find out how far away from Bhangora the training center was; and that biological rhythm would be his only clue.

For quite a long time, the great majority of specialists who studied biological rhythms accepted this explanation.

We, however, set our clocks to the biological rhythms of our environment.

In recent years, researchers have realized that light can affect daily or circadian biological rhythms.

On a fundamental level, being awake at odd or irregular hours fights with our biological rhythms.