Skipping Breakfast for 6 Days Delayed the Circadian Rhythm of the Body Temperature without Altering Clock Gene Expression in Human Leukocytes.
Nutrients
; 12(9)2020 Sep 12.
Article
en En
| MEDLINE
| ID: mdl-32932677
ABSTRACT
Breakfast is often described as "the most important meal of the day" and human studies have revealed that post-prandial responses are dependent on meal timing, but little is known of the effects of meal timing per se on human circadian rhythms. We evaluated the effects of skipping breakfast for 6 days on core body temperature, dim light melatonin onset, heart rate variability, and clock gene expression in 10 healthy young men, with a repeated-measures design. Subjects were provided an isocaloric diet three times daily (3M) or two times daily (2M, i.e., breakfast skipping condition) over 6 days. Compared with the 3M condition, the diurnal rhythm of the core body temperature in the 2M condition was delayed by 42.0 ± 16.2 min (p = 0.038). On the other hand, dim light melatonin onset, heart rate variability, and clock gene expression were not affected in the 2M condition. Skipping breakfast for 6 days caused a phase delay in the core body temperature in healthy young men, even though the sleep-wake cycle remained unchanged. Chronic effects of skipping breakfast on circadian rhythms remain to be studied.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Temperatura Corporal
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Ritmo Circadiano
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Conducta Alimentaria
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Proteínas CLOCK
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Desayuno
Tipo de estudio:
Clinical_trials
Límite:
Adult
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Humans
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Male
Idioma:
En
Año:
2020
Tipo del documento:
Article