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.

Others have learned how to manipulate their biological rhythms.

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

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

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

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

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

When activated, they send impulses to the master clock, which sets biological rhythms.

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

To be called circadian, a biological rhythm must meet these four general criteria:

In some ways, biorhythmics resembles chronobiology, the study of biological rhythms.

Hence their biological rhythms tend to occur in rough multiples of this period.

For billions of years, inorganic energy danced the cosmic round before the biological rhythm began.

"The biological rhythms in your body can't adjust to those constant fluctuations no wonder they have insomnia."

Under these circumstances, the circadian clock alone modulates the body's biological rhythms.

He had never got used to shift work; his biological rhythms, or whatever they were, had never adapted.

The present natural light-dark cycle is tied to human biological rhythms in ways that are, as yet, unexplored.

Seasons of Life: The biological rhythms that enable living things to thrive and survive.

These cycles are known as biological rhythms.

He also was noted for his work in "cosmo-biology", biological rhythms and hematology."

Therefore, changes in external zeitgebers can lead to disturbances in biological rhythms.

In addition, biological rhythms play a crucial role in determining how awake or sleepy one feels.