OBJECTIVE Acutely restricting sleep worsens insulin sensitivity in healthy individuals whose usual sleep is normal in duration and pattern. The effect of recovery or weekend 'catch-up' sleep on insulin sensitivity and metabolically active hormones in individuals with chronic sleep restriction who regularly 'catch-up' on sleep at weekends is as yet unstudied. DESIGN 19 men (mean ± SEM age 28·6...

Ghrelin and peptide YY (PYY) are newly recognized gut peptides involved in appetite regulation. Plasma ghrelin concentrations are elevated in fasting and suppressed following a meal, while PYY concentrations are suppressed in fasting and elevated postprandially. We determine whether ghrelin and PYY are altered by a low-fat, high-carbohydrate (10% fat, 75% carbohydrate) or moderate-fat, moderate...

AIM To analyse blood pressure characteristics during 24-hour ambulatory blood pressure monitoring in children and to assess factors that influence its success over 24 hours and during patient-recorded awake (DAY) and sleep (NIGHT) periods. METHODS A total of 169 consecutive ambulatory blood pressure monitoring studies were conducted in 154 patients over 30 months. For each ambulatory study, w...

Fasting Ramadan as worship has many benefits for health, so that these two goals can be achieved, it is necessary to regulate diet specifically, especially regulating nutritional intake during iftar and sahur. During fasting the will change, because only allowed eat in morning before dawn at night. The stomach left empty about 13 hours. Generally, body takes 3-5 days adapt a new diet. From aspe...

Total abstention from food and water from sunrise to sunset during the month of  Ramadan, is practiced by hundreds of millions of Muslims throughout the world. This pattern of fasting during Ramadan is different from the usual fasting as people are allowed to eat and drink between sunset and dawn but not after dawn. The amount and type of food (rich in protein, fat and sugar) eaten during the n...

1. In freely moving, unanesthetized rats bile flow was measured continuously over the whole day--night cycle. Bile composition was analysed and the influence of food intake on bile flow was investigated. 2. In both sexes a distinct circadian variation of bile production was observed. The mean night-time production was 50% higher than the day-time value for female rats and 38% for male rats. In ...

I read with great interest the article by Calvin et al (July 2013 ). 1 The authors found that people whose sleep was restricted to approximately 5 h per night over an 8-day period consumed on average 822 more calories per day than people who slept approximately 7 h per night. 1 This outcome is in-line with previous study fi ndings. For instance, when sleep-deprived for one night, young adults ...

OBJECTIVE Biochemical markers of bone turnover exhibit circadian rhythms with the peak during the night/early morning and the nadir in the late afternoon. The nocturnal increase in bone resorption could theoretically be caused by the absence of food consumption which brings about a decrease in net calcium absorption and an increase in parathyroid hormone (PTH), followed by increased bone resorp...