Sleep duration and obesity-related risk factors in the rural Midwest

Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD 21224, USA.
Preventive Medicine (Impact Factor: 3.09). 06/2008; 46(5):439-44. DOI: 10.1016/j.ypmed.2007.11.008
Source: PubMed


Habitual short sleep duration is a common practice linked to weight gain and risk of obesity. Our objective was to examine the association between sleep duration with other behaviors, such as physical activity and nutrition, which are important for obesity prevention efforts.
We used cross-sectional data from rural communities in Missouri, Tennessee, and Arkansas (N=1203). Controlling for covariates, we assessed the association between short sleep duration (<7 h vs. 7-8 h) and obesity, not meeting vigorous physical activity requirements, low fruit and vegetable consumption, high fat consumption, and frequently eating at fast food restaurants.
The proportion of participants with habitual sleep duration of <7 h, 7-8 h, and > or =9 h was 36.2%, 57.3%, and 6.4%, respectively. After multivariable adjustment, short sleep duration was associated with certain obesity-related behaviors, particularly lower physical activity and lower fruit and vegetable consumption.
Short sleep duration is associated with risk behaviors that are known to promote weight gain and obesity. Interventions aimed at promoting physical activity and improved nutrition may benefit by considering adequate sleep duration as a potentially modifiable behavior that may impact the effectiveness of efforts to prevent obesity.

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    • "Furthermore, in a report by the Center of Disease Control and Prevention released in May 2008, it was suggested that United States adults who usually report sleeping less than 6 h, were more likely to engage in certain health risk behaviors (i.e., cigarette smoking, consuming five or more alcoholic drinks per day), and not engaging in physical activity during leisure time [7]. Also, Stamatakis and Brownson reported that short sleep duration is associated with less physical activity and lower fruit and vegetable consumption [8]. In 2008 in a large general population study we reported a) self-reported short sleep duration is associated with obesity and b) importantly, short sleep duration is strongly linked to sleep complaints and emotional stress measured with extensive psychological testing (MMPI) [9]. "
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    • "In this study the changes of weight (P = 0.07) and BMI (P = 0.07) between two groups were not significant. Physical activity level (P = 0.02) in magnesium supplement group compared to placebo group showed a significant increase, which based on literature is presumed to be related to the fact that improvement in sleep patterns through decrement of daytime fatigue and sleepiness and their related high risk behaviors, results in increment of daily physical activity level.[333435] "
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    ABSTRACT: Nearly 50% of older adults have insomnia, with difficulty in getting to sleep, early awakening, or feeling unrefreshed on waking. With aging, several changes occur that can place one at risk for insomnia, including age-related changes in various circadian rhythms, environmental and lifestyle changes, and decreased nutrients intake, absorption, retention, and utilization. The natural N-methyl-D-aspartic acid (NMDA) antagonist and GABA agonist, Mg(2+), seems to play a key role in the regulation of sleep. The objective of this study was to determine the efficacy of magnesium supplementation to improve insomnia in elderly. A double-blind randomized clinical trial was conducted in 46 elderly subjects, randomly allocated into the magnesium or the placebo group and received 500 mg magnesium or placebo daily for 8 weeks. Questionnaires of insomnia severity index (ISI), physical activity, and sleep log were completed at baseline and after the intervention period. Anthropometric confounding factors, daily intake of magnesium, calcium, potassium, caffeine, calories form carbohydrates, and total calorie intake, were obtained using 24-h recall for 3 days. Blood samples were taken at baseline and after the intervention period for analysis of serum magnesium, renin, melatonin, and cortisol. Statistical analyses were performed using SPSS19 and P values < 0.05 were considered as statistically significant. No significant differences were observed in assessed variables between the two groups at the baseline. As compared to the placebo group, in the experimental group, dietary magnesium supplementation brought about statistically significant increases in sleep time (P = 0.002), sleep efficiency (P = 0.03), concentration of serum renin (P < 0.001), and melatonin (P = 0.007), and also resulted in significant decrease of ISI score (P = 0.006), sleep onset latency (P = 0.02) and serum cortisol concentration (P = 0.008). Supplementation also resulted in marginally between-group significant reduction in early morning awakening (P = 0.08) and serum magnesium concentration (P = 0.06). Although total sleep time (P = 0.37) did not show any significant between-group differences. Supplementation of magnesium appears to improve subjective measures of insomnia such as ISI score, sleep efficiency, sleep time and sleep onset latency, early morning awakening, and likewise, insomnia objective measures such as concentration of serum renin, melatonin, and serum cortisol, in elderly people.
    Journal of research in medical sciences 12/2012; 17(12):1161-9. · 0.65 Impact Factor
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    • "Our study indicated that lower fruit and vegetable intake was associated with poor sleep quality. Similar results were found for short sleep duration [14], although there is insufficient evidence to support this association. With respect to morbidities, only hypertension in men and diabetes in women were associated with poor sleep quality. "
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