biorhythm


Also found in: Dictionary, Encyclopedia, Wikipedia.

bi·o·rhythm

(bī'ō-rith-m),
A biologically inherent cyclic variation or recurrence of an event or state, such as the sleep cycle, circadian rhythms, or periodic diseases.
[bio- + G. rhythmos, rhythm]

biorhythm

(bī′ō-rĭth′əm)
n.
An innate, cyclical biological process or function.

bi′o·rhyth′mic (-rĭth′mĭk) adj.

biorhythm

Alternative medicine
A hypothetical biologic rhythm, which is said to be set at birth.
The biorhythm theory was first proposed by H Swoboda and W Fleiss, a contemporary and colleague of Sigmund Freud; proponents of the biorhythm theory believe there are three distinct cycles: a physical cycle of 23 days—which corresponds to co-ordination, immunity, self-confidence, and strength; an emotional cycle of 28 days; and an intellectual cycle of 33 days, all of which are defined by a sine wave; “critical periods” are believed to exist as an individual crosses the middle of a cycle, either from a high to a low, or vice versa.

Physiology
Cyclical variations in physiologic and biochemical function, level of activity and emotional state. Circadian biorhythms have a cycle of about 24 hrs; ultradian rhythms are < 1 day; infradian rhythms are greater than one day and may be up to weeks or months.

bi·o·rhythm

(bī'ō-ridh-ĕm)
A biologically inherent cyclic variation or recurrence of an event or state, such as the sleep cycle, circadian rhythms, or periodic diseases.
[bio- + G. rhythmos, rhythm]
References in periodicals archive ?
When a particular biorhythm is in the upper part of the cycle, this indicates beneficial days for activity.
The greatest variability in this case occurred in Scenario 6, explained by the accumulation of fatigue, monotony and variations related to biorhythm.
It is undetermined to what extent the tidal cycle affects the human biorhythm and to what extent humans can alter the impact of the tidal cycle.
Since a reliable biomarker for monitoring the adequacy of replacement therapy has not yet been identified and current glucocorticoid replacement regimens do not mimic normal diurnal biorhythm of cortisol, some patients may require different glucocorticoid replacement regimens or formulas.
They seem to come with the seasons, a geopolitical biorhythm that reminds us never to be too comfortable with one of the world's most volatile relationships.
The design of the installation was created by Nik and Soryonne Schweiger of 3deluxe -- biorhythm.
That's the biorhythm ordained by nature and reinforced at school.
If you love it, you'll probably get a kick out of Russell Grant's Astrology, which gives DS owners daily horoscopes, helping you keep track of the current position of the moon and your biorhythm, while offering advice on the important spheres of your life.
''There is a political biorhythm in these bilateral relations,'' he said.
It is packed with fun features including a powerful digital camera, 30+ polyphonic ring tones, a dual colour display and the built-in mirror and you can enter your date of birth into the biorhythm feature to calculate emotional, physical and intellectual levels on a daily basis.
Packed with features ( even one to check her physical and emotional well-being on a daily basis, pop her birthday into the biorhythm feature and it will calculate when she's fragile or likely to argue with you ( and its got a built-in mirror.
IF you're over 35 it could be natural biorhythm changes we all go through