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https://www.readbyqxmd.com/read/28329327/association-of-accelerometer-measured-physical-activity-with-leukocyte-telomere-length-among-older-women
#1
Aladdin H Shadyab, Michael J LaMonte, Charles Kooperberg, Alexander P Reiner, Cara L Carty, Todd M Manini, Lifang Hou, Chongzhi Di, Andrea Z LaCroix
Background: Previous studies on physical activity and telomere length have relied largely upon self-reported physical activity data, and few studies have examined older adults. The association of objectively measured physical activity with leukocyte telomere length (LTL) is currently unknown. Methods: In this study, we examined cross-sectional associations between accelerometer-measured total, light, and moderate-to-vigorous physical activity (MVPA) and LTL, measured using Southern blot...
March 9, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28326606/physical-activity-sedentary-time-and-bone-strength-from-childhood-to-early-adulthood-a-mixed-longitudinal-hr-pqct-study
#2
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/28326507/objectively-measured-sedentary-behavior-and-quality-of-life-among-survivors-of-early-stage-breast-cancer
#3
Sheri J Hartman, Catherine R Marinac, John Bellettiere, Suneeta Godbole, Loki Natarajan, Ruth E Patterson, Jacqueline Kerr
PURPOSE: This study examined relationships between sedentary behavior accumulated in different bout durations and quality of life (QoL) among breast cancer survivors. METHODS: Postmenopausal breast cancer survivors completed the Short Form Health Survey to assess QoL and wore an accelerometer to measure sedentary behavior and physical activity between August 2011 and May 2013. RESULTS: Participants (n = 134) averaged 509.7 min/day in sedentary time with 285...
March 22, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28322877/neighborhood-walkability-moderates-the-association-between-low-back-pain-and-physical-activity-a-co-twin-control-study
#4
J R Zadro, D Shirley, M B Pinheiro, A Bauman, G E Duncan, P H Ferreira
The aim of this study was to investigate whether neighborhood walkability moderates the association between low back pain (LBP) and physical activity (PA), using a co-twin design to control for genetics and shared environmental factors. A cross-sectional analysis was performed on 10,228 twins from the Washington State Twin Registry with available data on LBP from recruitment surveys between 2009 and 2013. LBP within the past 3months was our exposure variable. Our outcome variables were sufficient moderate or vigorous-intensity PA (MVPA, defined as at least 75min of vigorous-intensity PA, or 150min of moderate-intensity PA per week), and walking (≥150min per week)...
March 18, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28321706/evaluation-of-a-statewide-dissemination-and-implementation-of-physical-activity-intervention-in-afterschool-programs-a-nonrandomized-trial
#5
Michael W Beets, R Glenn Weaver, Gabrielle Turner-McGrievy, Ruth P Saunders, Collin A Webster, Justin B Moore, Keith Brazendale, Jessica Chandler
In 2015, YMCA-operated afterschool programs (ASPs) across South Carolina pledged to achieve the national standard that calls for every child to accumulate 30 min/day of moderate-to-vigorous physical activity (MVPA) during program time. This study shares the first-year findings related to the dissemination, implementation, and outcomes associated with the statewide intervention to achieve the MVPA Standard. Twenty ASPs were sampled from all YMCA-operated ASPs (N = 97) and visited at baseline (spring 2015) and first-year follow-up (spring 2016)...
March 20, 2017: Translational Behavioral Medicine
https://www.readbyqxmd.com/read/28320422/do-associations-between-objectively-assessed-physical-activity-and-neighbourhood-environment-attributes-vary-by-time-of-the-day-and-day-of-the-week-ipen-adult-study
#6
Ester Cerin, Josef Mitáš, Kelli L Cain, Terry L Conway, Marc A Adams, Grant Schofield, Olga L Sarmiento, Rodrigo Siqueira Reis, Jasper Schipperijn, Rachel Davey, Deborah Salvo, Rosario Orzanco-Garralda, Duncan J Macfarlane, Ilse De Bourdeaudhuij, Neville Owen, James F Sallis, Delfien Van Dyck
BACKGROUND: To more accurately quantify the potential impact of the neighbourhood environment on adults' physical activity (PA), it is important to compare environment-PA associations between periods of the day or week when adults are more versus less likely to be in their neighbourhood and utilise its PA resources. We examined whether, among adults from 10 countries, associations between objectively-assessed neighbourhood environment attributes and moderate-to-vigorous physical activity (MVPA) varied by time of the day and day of the week...
March 20, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28319590/endocannabinoid-and-mood-responses-to-exercise-in-adults-with-varying-activity-levels
#7
Angelique G Brellenthin, Kevin M Crombie, Cecilia J Hillard, Kelli F Koltyn
Acute aerobic exercise improves mood and activates the endocannabinoid (eCB) system in physically active individuals; however, both mood and eCB responses to exercise may vary based on habitual levels of physical activity. PURPOSE: To examine eCB and mood responses to prescribed and preferred exercise among individuals with low, moderate, and high levels of physical activity. METHODS: Thirty-six healthy adults (21±4yrs) were recruited from low (≤60min moderate-vigorous physical activity [MVPA]/wk), moderate (150-299min MVPA/wk), and high (≥300 MVPA/wk) physical activity groups...
March 18, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28319587/sedentary-behavior-physical-activity-and-fitness-the-maastricht-study
#8
Jeroen Hpm van der Velde, Annemarie Koster, Julianne D van der Berg, Simone Js Sep, Carla Jh van der Kallen, Pieter C Dagnelie, Miranda T Schram, Ronald Ma Henry, Simone Jpm Eussen, Martien Cjm van Dongen, Coen DA Stehouwer, Nicolaas C Schaper, Hans Hcm Savelberg
PURPOSE: This cross-sectional study examined the mutual independent associations of sedentary behavior, lower intensity physical activity (LPA) and higher intensity physical activity HPA (an approximation of moderate to vigorous physical activity (MVPA) with cardio-respiratory fitness (CRF). METHODS: 2,024 participants were included from The Maastricht Study (mean±SD age: 59.7±8.1 years, 49.6% men). With the activPAL3 activity monitor we assessed sedentary time (ST), sedentary pattern variables (number of sedentary breaks, average sedentary bout duration, and number of prolonged sedentary bouts (≥30 min)), LPA, and HPA...
March 18, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28316789/reliability-and-concurrent-validity-of-the-international-physical-activity-questionnaire-short-form-among-pregnant-women
#9
Birgitte Sanda, Ingvild Vistad, Lene Annette Hagen Haakstad, Sveinung Berntsen, Linda Reme Sagedal, Hilde Lohne-Seiler, Monica Klungland Torstveit
ABSTRACT: Sanda B, Vistad I, Haakstad LAH, Berntsen S, Sagedal LR, Lohne-Seiler H, Torstveit MK. Reliability and concurrent validity of the International Physical Activity Questionnaire short form among pregnant women. BACKGROUND: The International Physical Activity Questionnaire short-form (IPAQ-SF) is frequently used to assess physical activity (PA) level in the general adult population including pregnant women. However, the reliability and validity of the questionnaire in pregnancy is unknown...
2017: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28301950/cardiorespiratory-fitness-but-not-physical-activity-is-associated-with-academic-achievement-in-children-and-adolescents
#10
Tânia Oliveira, Andreia Pizarro, Manuela Costa, Luís Fernandes, Gustavo Silva, Jorge Mota, José Carlos Ribeiro
BACKGROUND: Cardiorespiratory fitness (CRF) and physical activity (PA) seem to have positive effects on academic achievement (AA), although in most studies, objective methods of assessment have not been used. AIM: To examine the associations of CRF and PA with AA. SUBJECTS & METHODS: A sample of 640 youngsters (10-18 years) participated in this cross-sectional study. CRF was estimated with the 20-metre shuttle run test and PA was measured using accelerometers...
March 16, 2017: Annals of Human Biology
https://www.readbyqxmd.com/read/28299832/secular-and-longitudinal-physical-activity-changes-in-population-based-samples-of-children-and-adolescents
#11
Knut Eirik Dalene, Sigmund A Anderssen, Lars Bo Andersen, Jostein Steene-Johannessen, Ulf Ekelund, Bjørge H Hansen, Elin Kolle
PURPOSE: 1) To investigate if physical activity (PA) and sedentary time (ST) in 9- and 15-year-olds differed between 2005-06 and 2011-12 (secular change) and: 2) to investigate changes in PA and ST from age 9 to 15 (longitudinal change). METHODS: In 2005-06, we invited nationally representative samples of Norwegian 9- (n=1470) and 15-year-olds (n=1348) to participate. In 2011-12, we invited a new nationally representative sample of 9-year-olds (n=1945), whereas 15-year-olds (n=1759) were invited to participate either based on previous participation in 2005-06 or from a random sample of schools...
March 16, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28298199/school-time-physical-activity-among-arab-elementary-school-children-in-qatar
#12
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/28293180/brief-mental-training-reorganizes-large-scale-brain-networks
#13
Yi-Yuan Tang, Yan Tang, Rongxiang Tang, Jarrod A Lewis-Peacock
Emerging evidences have shown that one form of mental training-mindfulness meditation, can improve attention, emotion regulation and cognitive performance through changing brain activity and structural connectivity. However, whether and how the short-term mindfulness meditation alters large-scale brain networks are not well understood. Here, we applied a novel data-driven technique, the multivariate pattern analysis (MVPA) to resting-state fMRI (rsfMRI) data to identify changes in brain activity patterns and assess the neural mechanisms induced by a brief mindfulness training-integrative body-mind training (IBMT), which was previously reported in our series of randomized studies...
2017: Frontiers in Systems Neuroscience
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
#14
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/28291838/level-and-correlates-of-physical-activity-and-sedentary-behavior-in-patients-with-type-2-diabetes-a-cross-sectional-analysis-of-the-italian-diabetes-and-exercise-study_2
#15
Stefano Balducci, Valeria D'Errico, Jonida Haxhi, Massimo Sacchetti, Giorgio Orlando, Patrizia Cardelli, Nicolina Di Biase, Lucilla Bollanti, Francesco Conti, Silvano Zanuso, Antonio Nicolucci, Giuseppe Pugliese
OBJECTIVE: Patients with type 2 diabetes usually show reduced physical activity (PA) and increased sedentary (SED)-time, though to a varying extent, especially for low-intensity PA (LPA), a major determinant of daily energy expenditure that is not accurately captured by questionnaires. This study assessed the level and correlates of PA and SED-time in patients from the Italian Diabetes and Exercise Study_2 (IDES_2). METHODS: Three-hundred physically inactive and sedentary patients with type 2 diabetes were enrolled in the IDES_2 to be randomized to an intervention group, receiving theoretical and practical exercise counseling, and a control group, receiving standard care...
2017: PloS One
https://www.readbyqxmd.com/read/28290759/cross-validation-of-two-accelerometers-for-assessment-of-physical-activity-and-sedentary-time-in-preschool-children
#16
Sofiya Alhassan, John R Sirard, Laura B F Kurdziel, Samantha Merrigan, Cory Greever, Rebecca M C Spencer
PURPOSE: The purpose of this study was to cross-validate previously developed Actiwatch (AW; Ekblom et al. 2012) and AcitGraph (AG; Sirard et al. 2005; AG-P, Pate et al. 2006) cut-point equations to categorize free-living physical activity (PA) of preschoolers using direct observation (DO) as the criterion measure. A secondary aim was to compare output from the AW and the AG from previously developed equations. METHODS: Participants' (n=33; age=4.4±0.8 yrs; females, n=12) PA was directly observed for three 10-minute periods during the preschool-day while wearing the AW (non-dominant wrist) and AG (waist)...
March 14, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28290744/psychosocial-predictors-of-physical-activity-change-among-college-students-in-an-obesity-prevention-trial
#17
Danielle Arigo, Paul Rohde, Heath Shaw, Eric Stice
BACKGROUND: Moderate-to-vigorous physical activity (MVPA) is critical for maintaining a healthy weight, although little is known about psychological barriers to maintaining MVPA in at-risk groups. Identifying characteristics associated with poor MVPA maintenance in obesity prevention programs could improve participant outcomes. METHODS: Toward this end, we examined predictors of MVPA in an obesity prevention trial for college students at risk for weight gain (n = 333; 72% female, MBMI = 23...
March 14, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28290076/brain-functional-connectivity-in-lung-cancer-population-an-exploratory-study
#18
M Simó, X Rifà-Ros, L Vaquero, P Ripollés, N Cayuela, J Jové, A Navarro, F Cardenal, J Bruna, Antoni Rodríguez-Fornells
The present study aimed to explore the functional connectivity differences in Resting State Networks (RSNs) induced by cancer and chemotherapy in Lung Cancer (LC) patients using an Independent Component Analysis (ICA). Three matched groups of 15 LC patients following Chemotherapy (C+), 15 LC patients before Chemotherapy (C-) and 15 Healthy Controls (HC) were included. Analysis was performed using ICA and a multivariate pattern analysis (MVPA) to classify groups based on profiles of functional connectivity. We found significant differences in four of the RSN identified: Default Mode Network (DMN), Predominantly Left and Right Anterior Temporal Network, and Cerebellum Network...
March 13, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28288966/timing-of-the-decline-in-physical-activity-in-childhood-and-adolescence-gateshead-millennium-cohort-study
#19
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/28286476/decoding-movement-goals-from-the-fronto-parietal-reach-network
#20
Hanna Gertz, Angelika Lingnau, Katja Fiehler
During reach planning, fronto-parietal brain areas need to transform sensory information into a motor code. It is debated whether these areas maintain a sensory representation of the visual cue or a motor representation of the upcoming movement goal. Here, we present results from a delayed pro-/anti-reach task which allowed for dissociating the position of the visual cue from the reach goal. In this task, the visual cue was combined with a context rule (pro vs. anti) to infer the movement goal. Different levels of movement goal specification during the delay were obtained by presenting the context rule either before the delay together with the visual cue (specified movement goal) or after the delay (underspecified movement goal)...
2017: Frontiers in Human Neuroscience
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