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https://www.readbyqxmd.com/read/28329370/sleep-characteristics-and-daytime-cortisol-levels-in-older-adults
#1
Ethan Morgan, L Philip Schumm, Martha McClintock, Linda Waite, Diane S Lauderdale
Objective: Older adults frequently report sleep problems and are at increased risk for cardiometabolic disruption. Experimental sleep restriction of younger adults has suggested that cortisol may be on the pathway between sleep restriction and cardiometabolic disease. We investigated whether the natural variation in sleep among older adults is associated with daytime cortisol level. Methods: Salivary cortisol samples and actigraphy sleep data were collected from a random subsample of participants in the National Social Life, Health and Aging Project, a nationally-representative probability sample of adults aged 62-90 (N=672)...
March 9, 2017: Sleep
https://www.readbyqxmd.com/read/28328790/comparison-of-the-effects-of-quetiapine-xr-and-lithium-monotherapy-on-actigraphy-measured-circadian-parameters-in-patients-with-bipolar-ii-depression
#2
Jeong Yeon Hwang, Jae-Won Choi, Seung-Gul Kang, Su Hwan Hwang, Seog Ju Kim, Yu Jin Lee
PURPOSE/BACKGROUND: The aim of this study was to evaluate the effects of quetiapine XR and lithium on actigraphy-measured circadian parameters in patients with bipolar II depression. METHODS/PROCEDURES: This was an 8-week, open-label, prospective, randomized comparative study. The assessments included the 17-item Hamilton Depression Rating Scale score and actigraphic measures concerning the previous 7 days, collected at each visit (weeks 0 [baseline], 1, 2, 4, 6, and 8); the actigraphic data were analyzed with a cosinor analysis...
March 21, 2017: Journal of Clinical Psychopharmacology
https://www.readbyqxmd.com/read/28328573/activity-rhythms-and-clinical-correlates-in-fibromyalgia
#3
Ariel B Neikrug, Gary Donaldson, Eli Iacob, Sam L Williams, Christopher A Hamilton, Akiko Okifuji
The primary aim of this study was to evaluate activity rhythms in fibromyalgia syndrome (FMS) and their association with FMS-related symptoms. We hypothesized that stronger and more consistent activity rhythms would be associated with reduced symptom severity and presentation in FMS. 292 patients with FMS (Mean age = 45.1±11.1; 272 females) provided a 7-day actigraphy recording and responses to questionnaires addressing degree of pain, fatigue, mood, and physical impairment. Using a simple cosine model, we extracted Amplitude (activity range), Phi (time at maximum), Mesor (mean activity), and their variabilities (across days) from each participant's actigraphy...
March 21, 2017: Pain
https://www.readbyqxmd.com/read/28326793/changes-in-habitual-sleep-duration-after-continuous-positive-airway-pressure-for-obstructive-sleep-apnea
#4
Ryo Tachikawa, Takuma Minami, Takeshi Matsumoto, Kimihiko Murase, Kiminobu Tanizawa, Morito Inouchi, Toru Oga, Kazuo Chin
RATIONALE: Obstructive sleep apnea (OSA) can affect not only sleep quality but also sleep duration. Determining the therapeutic effects of continuous positive airway pressure (CPAP) on habitual sleep profiles may shed light on the impact of OSA on sleep duration. OBJECTIVES: To determine whether and how CPAP affects habitual sleep duration in patients with OSA. METHODS: Assessments of sleep duration and sleep quality were performed on 57 newly diagnosed study subjects with OSA (46 men, median 63 years, apnea-hypopnea index >20 h-1) at baseline and 3 months after initiation of CPAP therapy...
March 22, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28326606/physical-activity-sedentary-time-and-bone-strength-from-childhood-to-early-adulthood-a-mixed-longitudinal-hr-pqct-study
#5
Leigh Gabel, Heather M Macdonald, Lindsay Nettlefold, Heather A McKay
Bone strength is influenced by bone geometry, density, and bone microarchitecture, which adapt to increased mechanical loads during growth. Physical activity (PA) is essential for optimal bone strength accrual; however, less is known about how sedentary time influences bone strength and its determinants. Thus, our aim was to investigate the prospective associations between PA, sedentary time, and bone strength and its determinants during adolescence. We used HR-pQCT at distal tibia (8% site) and radius (7% site) in 173 girls and 136 boys (aged 9 to 20 years at baseline)...
March 22, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28324980/effect-of-wearable-sensor-dynamics-on-physical-activity-estimates-a-comparison-between-sci-vs-healthy-individuals
#6
C Jayaraman, C K Mummidisetty, A Jayaraman
Accuracy of physical activity estimates predicted by activity monitoring technologies may be affected by device location, analysis algorithms, type of technology (i.e. wearable/stickable) and population demographics (disability) being studied. Consequently, the main purpose of this investigation was to study such sensor dynamics (i.e. effect of device location, type and population demographics on energy expenditure estimates) of two commercial activity monitors. It was hypothesized that device location, population studied (disability), choice of proprietary algorithm and type of technology used will significantly impact the accuracy of the predicted physical activity metrics...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324755/sedentary-behavior-different-types-of-operationalization-influence-outcome-measures
#7
Malou H J Fanchamps, Hendrika J G van den Berg-Emons, Henk J Stam, Johannes B J Bussmann
INTRODUCTION: Sedentary behavior (SB) influences health status independently of physical activity. The formal definition of SB is: "any waking behavior characterized by an energy expenditure ≤1.5 METs while in a sitting or reclining posture". However, measuring SB mostly does not include both the intensity and postural component. The aim of this study was to quantify the effect of type of operationalization of SB on total sedentary time and the pattern of SB. METHODS: 53 healthy subjects were measured 24h with a multi-sensor activity monitor that provides a valid one-second detection of body postures and movements and a calculated intensity measure...
March 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28322669/acculturation-and-physical-activity-among-latinas-enrolled-in-a-12-month-walking-intervention
#8
Rodney P Joseph, Tanya J Benitez, Barbara E Ainsworth, Michael Todd, Colleen Keller
This report evaluates the relationship between acculturation and assimilation with the physical activity (PA) outcomes of a 12-month walking intervention for postpartum Latinas ( n = 81, M age = 29.2 years, M BMI [body mass index] = 30.0). PA was measured by ActiGraph GT1M accelerometers. Acculturation and assimilation were measured by the Hazuda Acculturation and Assimilation Scales. Data were collected at baseline, 6 months, and 12 months. Results showed a trend for participants classified in the least acculturated groups to engage in more moderate-to-vigorous PA than participants classified in the higher acculturated/assimilated groups for two dimensions of acculturation (Adult Proficiency in English Versus Spanish, p = ...
February 1, 2017: Western Journal of Nursing Research
https://www.readbyqxmd.com/read/28316012/associations-of-visceral-fat-area-and-physical-activity-levels-with-the-risk-of-metabolic-syndrome-in-postmenopausal-women
#9
Izabela Zając-Gawlak, Barbara Kłapcińska, Aleksandra Kroemeke, Dariusz Pośpiech, Jana Pelclová, Miroslava Přidalová
This study was aimed at the evaluation of relationship between visceral fat area (VFA) and physical activity (PA) with the metabolic syndrome (MetS) risk in the physically active postmenopausal women. A total of 85 attendants of the University of the Third Age (U3A) aged 62.8 ± 5.9 years (median time since menopause 11.8 y), participated in this study. VFA was assessed by bioimpedance method using InBody 720 analyzer. PA was assessed using the ActiGraph GT1 M accelerometer. Fasting levels of serum lipids (TG, HDL), serum glucose, waist circumference (WC) and blood pressure were measured to diagnose MetS according to NCEP-ATP III criteria...
March 18, 2017: Biogerontology
https://www.readbyqxmd.com/read/28303543/accelerometer-data-collection-and-processing-criteria-to-assess-physical-activity-and-other-outcomes-a-systematic-review-and-practical-considerations
#10
REVIEW
Jairo H Migueles, Cristina Cadenas-Sanchez, Ulf Ekelund, Christine Delisle Nyström, Jose Mora-Gonzalez, Marie Löf, Idoia Labayen, Jonatan R Ruiz, Francisco B Ortega
BACKGROUND: Accelerometers are widely used to measure sedentary time, physical activity, physical activity energy expenditure (PAEE), and sleep-related behaviors, with the ActiGraph being the most frequently used brand by researchers. However, data collection and processing criteria have evolved in a myriad of ways out of the need to answer unique research questions; as a result there is no consensus. OBJECTIVES: The purpose of this review was to: (1) compile and classify existing studies assessing sedentary time, physical activity, energy expenditure, or sleep using the ActiGraph GT3X/+ through data collection and processing criteria to improve data comparability and (2) review data collection and processing criteria when using GT3X/+ and provide age-specific practical considerations based on the validation/calibration studies identified...
March 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28298199/school-time-physical-activity-among-arab-elementary-school-children-in-qatar
#11
Lena Zimmo, Abdulaziz Farooq, Fuad Almudahka, Izzeldin Ibrahim, Mohamed Ghaith Al-Kuwari
BACKGROUND: Recent data from a self-administered questionnaire show that approximately 75% of school children in Qatar do not meet the daily recommended levels of physical activity (PA). Since children spend half of their waking hours in school, it is important to understand when and how much PA children accumulate during the school day. This study aimed to objectively assess school-time PA among elementary school children in Qatar and to determine association of PA with age, gender, body mass index (BMI) status, or day of the week...
March 15, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28294708/sleep-patterns-and-neuropsychiatric-symptoms-in-hospitalized-patients-with-dementia
#12
Kaloyan S Tanev, Andrew Winokur, Roger K Pitman
The authors examined 28 dementia inpatients receiving treatment as usual. Beginning-to-end differences in neuropsychiatric symptoms and actigraphic sleep patterns were measured. Using a mixed-model, the authors regressed neuropsychiatric symptoms on average sleep minutes (between-subjects effect) and each night's deviation from average (within-subject effect). Sleep did not significantly differ from beginning to end of participation, whereas neuropsychiatric symptoms did. Average sleep minutes predicted average neuropsychiatric symptoms (p=0...
March 15, 2017: Journal of Neuropsychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28293017/longitudinal-study-of-the-associations-between-change-in-sedentary-behavior-and-change-in-adiposity-during-childhood-and-adolescence-gateshead-millennium-study
#13
K D Mann, L D Howe, L Basterfield, K N Parkinson, M S Pearce, J K Reilly, A J Adamson, J J Reilly, X Janssen
BACKGROUND: Sedentary time (ST) has been reported to have a range of negative health effects in adults, however, the evidence for such effects among children and adolescents is sparse. The primary aim of the study was to examine associations between changes in sedentary behavior (time and fragmentation) and changes in adiposity across childhood and adolescence. METHODS: Participants were recruited as part of the Gateshead Millennium Study. Measures were taken at age 7y (n=502), 9y (n=506), 12y (n=420) and 15y (n=306)...
March 15, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28290761/comparison-between-wrist-worn-and-waist-worn-accelerometry
#14
Paul D Loprinzi, Brandee Smith
OBJECTIVE: To use the most recent ActiGraph model (GT9X) to compare counts per minute (CPM) estimates between wrist-worn and waist-worn attachment sites. METHODS: Participants completed two conditions (laboratory [N=13] and free-living conditions [N=9]), in which during both of these conditions they wore two ActiGraph GT9X accelerometers on their non-dominant wrist (side-by-side) and two ActiGraph GT9X accelerometers on their right hip in line with the midaxillary line (side-by-side)...
March 14, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28288966/timing-of-the-decline-in-physical-activity-in-childhood-and-adolescence-gateshead-millennium-cohort-study
#15
Mohammed Abdulaziz Farooq, Kathryn N Parkinson, Ashley J Adamson, Mark S Pearce, Jessica K Reilly, Adrienne R Hughes, Xanne Janssen, Laura Basterfield, John J Reilly
BACKGROUND AND AIM: There is a widely held and influential view that physical activity begins to decline at adolescence. This study aimed to identify the timing of changes in physical activity during childhood and adolescence. METHODS: Longitudinal cohort study (Gateshead Millennium Study) with 8 years of follow-up, from North-East England. Cohort members comprise a socioeconomically representative sample studied at ages 7, 9, 12 and 15 years; 545 individuals provided physical activity data at two or more time points...
March 13, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28288011/using-activity-monitors-to-measure-sit-to-stand-transitions-in-overweight-obese-youth
#16
Tarrah Mitchell, Kelsey Borner, Jonathan Finch, Jacqueline Kerr, Jordan Carlson
INTRODUCTION: Reducing sedentary behavior has emerged as an important health intervention strategy. Although hip-worn, and more recently wrist-worn, accelerometers are commonly used for measuring physical activity and sedentary behavior, they may not provide accurate measures of postural changes. The current study examined the validity of commonly used hip- and wrist-worn accelerometer cut points and the thigh-worn activPAL activity monitor for measuring sit-to-stand transitions as compared to direct observation in youth with overweight and obesity...
March 10, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28287783/personality-and-actigraphy-measured-physical-activity-in-older-adults
#17
Ashley Artese, Desirae Ehley, Angelina R Sutin, Antonio Terracciano
Most studies on personality and physical activity have relied on self-report measures. This study examined the relation between Five Factor Model personality traits and objective physical activity in older adults. Sixty-nine participants (Mage = 80.2 years; SD = 7.1) wore the ActiGraph monitor for 7 days and completed the NEO Personality Inventory-3 First Half. Extraversion, Agreeableness, and Conscientiousness were associated with more moderate physical activity and more steps per day whereas Neuroticism was inversely related to these physical activity measures (βs > ...
March 2017: Psychology and Aging
https://www.readbyqxmd.com/read/28276853/worsening-of-rest-activity-circadian-rhythm-and-quality-of-life-in-female-breast-cancer-patients-along-progression-of-chemotherapy-cycles
#18
Armiya Sultan, Vivek Choudhary, Arti Parganiha
Chemotherapy and its associated side effects can induce the disruption of circadian rest-activity rhythm and may have negative consequences on health-related quality of life (HRQoL) of cancer patients. In the current study, repeated-measures cross-sectional design was implemented to determine the status of circadian rest-activity rhythm and to assess the HRQoL of newly diagnosed female breast cancer patients those were planned to receive six cycles of chemotherapy. Rest activity and HRQoL were assessed in twenty-five patients during chemotherapy cycles 1st (C1), 3rd (C3), and 6th (C6) immediately after they reported to the outdoor ward of the Regional Cancer Center, Pt...
February 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28264859/physical-activity-and-sedentary-behavior-in-children-with-congenital-heart-disease
#19
Christine Voss, Stephanie L Duncombe, Paige H Dean, Astrid M de Souza, Kevin C Harris
BACKGROUND: Children with congenital heart disease (CHD) are thought to have low levels of physical activity (PA), but few studies have used objective measures of PA in this population. METHODS AND RESULTS: We recruited patients with mild, moderate, and severe CHD and cardiac transplant recipients, aged 8 to 19 years, from pediatric cardiology clinics throughout British Columbia and Yukon, Canada. Participants were fitted with an ActiGraph accelerometer to be worn over the right hip for 7 days...
March 6, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28255190/children-s-sleep-and-academic-achievement-the-moderating-role-of-effortful-control
#20
Anjolii Diaz, Rebecca Berger, Carlos Valiente, Nancy Eisenberg, Sarah VanSchyndel, Chun Tao, Tracy L Spinrad, Leah D Doane, Marilyn S Thompson, Kassondra M Silva, Jody Southworth
Poor sleep is thought to interfere with children's learning and academic achievement (AA). However, existing research and theory indicate there are factors that may mitigate the academic risk associated with poor sleep. The purpose of this study was to examine the moderating role of children's effortful control (EC) on the relation between sleep and AA in young children. One hundred and three 4.5- to 7-year-olds (M = 5.98 years, SD = 0.61) wore a wrist-based actigraph for five continuous weekday nights. Teachers and coders reported on children's EC...
March 2017: International Journal of Behavioral Development
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