The last 20 yrs have seen a marked increase in studies utilizing actigraphy in free-living environments. The aim of the present study is to directly compare two commercially available actigraph devices with concurrent polysomnography (PSG) during a daytime nap in healthy young adults. Thirty healthy young adults, ages 18–31 (mean 20.77 yrs, SD 3.14 ...
Objective To investigate the single and combined associations of physical activity (PA), body mass index (BMI), and sleep duration with clustering of cardiovascular disease risk markers in healthy children. Methods We did a cross-sectional pilot-study of 74 Danish school children aged 8-11 years. Risk factors included in a continuous metabolic syndrome ...
This study compared measures of sleep from an accelerometer worn on the hip to measures obtained from an accelerometer worn on the wrist, the gold standard measure of sleep behavior in community research. The accelerometer worn on the hip provides a measure of total sleep time in 10- to 11-year-old ...
Statement of Problem Epidemiological studies examining the association between physical activity and sleep have relied on self-report measures of physical activity and have primarily been conducted in older adults. Therefore, to address these gaps in the literature, the purpose of the present study was to examine the association between objectively-measured ...
Introduction A tri-axis accelerometer has been extensively used in recent years. We report our recent evaluation of the usefulness of a three-axis accelerometer for sleep-wake scoring of healthy individuals and patients with sleep-disordered breathing (SDB). Methods Subjects Seven healthy university students 4 men, 3 women, mean age of 21.1±0.7 Seven SDB patients 6 men, 1 ...
The following fundamental research was not performed explicitly using an ActiGraph device. However, the theories developed in this paper are used extensively in ActiGraph's ActiLife software. The purpose of this study was to develop and validate automatic scoring methods to distinguish sleep from wakefulness based on wrist activity. Forty-one subjects (18 ...
The following fundamental research was not performed explicitly using an ActiGraph device. However, the theories developed in this paper are used extensively in ActiGraph's ActiLife software. Abstract The effects of actigraph placement and device sensitivity on actigraphic automatic sleep-wake scoring were assessed using concomitant polysomnographic and wrist actigraphic data from ...
Background Continuous positive airway pressure (CPAP) therapy has been shown to be effective in alleviating the underlying obstruction as well as reducing patients’ excessive sleepiness and improving their functioning and health-related quality of life. However, residual excessive sleepiness is observed in some patients even though CPAP therapy eliminates sleep apnea ...
Complaints of poor sleep and changes in sleep-wake patterns are common among old people. An understanding of the common 24-hour sleep-wake patterns and sleep satisfaction among old people is essential for effective sleep management. To this end, an exploratory study was conducted to examine the phenomenon. A set of valid ...
A study in the Dec.1 issue of the journal Sleep suggests that changes in children’s sleep patterns that typically occur between the ages of 11 and 12 years are evident before the physical changes associated with the onset of puberty. Results show that over the two-year course of the study, sleep ...