Characteristics Associated With Sleep Duration, Chronotype, and Social Jet Lag in Adolescents

Malone, Susan Kohl; Zemel, Babette S.; Compher, Charlene; Souders, Margaret C.; Chittams, Jesse; Thompson, Aleda; Lipman, Terri H.

doi:10.1177/1059840515603454

Cited by 54 publications

(38 citation statements)

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“…Studies analyzing functional metabolism and brain neurophysiology demonstrate that neural systems involved in executive functions are affected by the sleep loss, even with partial sleep restriction 19 . One of these conditions of sleep disruption is the social jetlag, one of the most common disturbances in the daily routine 35 . Sleep problems affect cognitive function and may deteriorate the response time, the process of task acquisition and the task execution performance in a short period of time, as well as an increase in the effort in the implementation of the tasks in an efficient way 19 , 36 .…”

Section: Discussionmentioning

confidence: 99%

Social jetlag impairs balance control

Umemura

Pinho

Gonçalves

et al. 2018

Sci Rep

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We assessed the impact of a common sleep disturbance, the social jetlag, on postural control during a period involving workdays and free days. The sleep habits of 30 healthy subjects were registered with a wrist actimeter for nine days (starting on Friday) and they participated in a set of four postural control tests carried out on Friday and on Monday. In addition, the subjects filled questionnaires about their sleep conditions and preferences. Actimetry measurements were used to calculate the Mid Sleep Phase (MSP). The difference between the MSP values on the workdays and free days measures the social jetlag. There were significant differences in sleep variables between workdays and free days. Postural control performance improved on Monday, after free sleep over the weekend, when compared with the tests performed on Friday. It seems that social jetlag affects brain areas involved in the control of posture, such as thalamus and the prefrontal cortex as well as the cerebellum, resulting in a worse performance in postural control. The performance improvement in the posture tests after the free days could be attributed to a lower sleep debt.

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Section: Discussionmentioning

confidence: 99%

Social jetlag impairs balance control

Umemura

Pinho

Gonçalves

et al. 2018

Sci Rep

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“…Norwegian female adolescents with higher waist measurements are more likely to become overweight over time (Bratberg, Nilsen, Holmen, & Vatten, 2007). Although the underlying mechanisms for the association between later midpoints of sleep and higher waist to height ratios are uncertain, later midpoints of sleep have been associated with fewer days of physical activity per week in adolescents (Malone et al, 2015). …”

Section: Discussionmentioning

confidence: 99%

Social jet lag, chronotype and body mass index in 14–17-year-old adolescents

Malone

Zemel

Compher

et al. 2016

Chronobiology International

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The relationship between sleep duration and obesity in adolescents is inconclusive. This may stem from a more complex relationship between sleep and obesity than previously considered. Shifts towards evening preferences, later sleep-wake times, and irregular sleep-wake patterns are typical during adolescence but their relationship to body mass index has been relatively unexplored. This cross sectional study examined associations between sleep duration, midpoint of sleep, and social jetlag (estimated from seven days of continuous actigraphy monitoring) and morningness/eveningness with body mass indexes (BMI z scores) and waist to height ratios in 14 to 17 year old adolescents. Seventy participants were recruited from 9th and 10th grades at a public high school. Participant characteristics were as follows: 74% female, 75% post-pubertal, 36% Hispanic, 38% White, 22% Black, 4% Asian, and 64% free/reduced lunch participants with a mean age of 15.5 (SD, 0.7). Forty one percent of the participants were obese (BMI ≥ 95th percentile); 54% were abdominally obese (waist to height ratio ≥ 0.5). Multivariable general linear models were used to estimate the association between the independent variables (school night sleep duration, free night sleep duration, midpoint of sleep (corrected), social jetlag, and morningness/eveningness) and the dependent variables (BMI z scores and waist to height ratios). Social jetlag positively associated with BMI z scores (p < 0.01) and waist to height ratios (p = 0.01). Midpoint of sleep (corrected) positively associated with waist to height ratios (p = 0.01). After adjusting for social jetlag, school night sleep duration was not associated with waist to height ratios or BMI z scores. Morningness/eveningness did not moderate the association between sleep duration and BMI z scores. Findings from this study suggest that chronobiological approaches to preventing and treating obesity may be important for accelerating progress in reducing obesity rates in adolescents.

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“…Evening‐type adolescents have reported greater social jet lag (SJL) by delaying their mid‐point of sleep approximately 2 hr from weekdays to weekends (Díaz‐Morales & Escribano, ; Malone et al ., ; Martínez et al ., ; Vollmer et al ., ). Furthermore, SJL has been related to depressive symptoms (Levandovski et al ., ), seasonality (Polugrudov et al ., ), physical aggression (Randler & Vollmer, ), and lower academic performance (Díaz‐Morales & Escribano, ), with the latter study indicating that SJL may also impact on basic cognitive abilities.…”

Section: Introductionmentioning

confidence: 99%