Effect of low and high glycaemic index drink on sleep pattern in children.
OBJECTIVE
To evaluate the effect of high and low glycaemic index drinks on children's sleep pattern.


METHODS
Eight children underwent 3 nights of full polysomnography study, one familiarization and two test nights consecutively. On the test nights, 1 hour before bedtime, the children had a milk drink of either low or high GI in a random order. The glycaemic loads (GL) were 7.4 and 52.8 for low and high GI drink respectively.


RESULTS
The mean of total arousal index in the first half of night after the high GI was greater than that of low GI drink. (12.9 +/- 4.6 vs. 9.9 +/- 2.2, P = 0.03). NREM arousal index in the first half of night after the high GI was also higher than that of low GI drink. (12.7 +/- 4.8 vs. 9.6 +/- 2.3, P = 0.05). Other sleep parameters did not show any significant difference in low GI and high GI diets.


CONCLUSIONS
NREM and total arousal indices were higher in those who consumed high GI drinks compared with low GI, one hour before sleep. It seems that the high quantity consumption of carbohydrates close to the bedtime is accompanied by frequent arousals and may affect the sleep quality.
Qazvin University of Medical Sciences and Health Services, Qazvin, Iran.
Shabnam
S
Jalilolghadr
Ahmad
A
Afaghi
Helen
H
O'Connor
Chin Moi
CM
Chow
D001143:Arousal; D001628:Beverages; D001786:Blood Glucose / Q000032:analysis; D002648:Child; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D005260:Female; D038321:Glycemic Index; D006801:Humans; D008297:Male; D017286:Polysomnography; D012894:Sleep Stages / Q000187:drug effects / Q000502:physiology*
D001786:Blood Glucose; D004040:Dietary Carbohydrates