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Physical activity and stress

David Hernando, Nuria Garatachea, Rute Almeida, Jose Antonio Casajús, Raquel Bailón
Heart rate variability (HRV) analysis during exercise is an interesting non-invasive tool to measure the cardiovascular response to the stress of exercise. Wearable heart rate monitors are a comfortable option to measure RR intervals while doing physical activities. It is necessary to evaluate the agreement between HRV parameters derived from the RR series recorded by wearable devices and those derived from an ECG during dynamic exercise of low to high intensity.23 male volunteers performed an exercise stress test on a cycle ergometer...
September 27, 2016: Journal of Strength and Conditioning Research
Eija Haukka, Anneli Ojajärvi, Leena Kaila-Kangas, Päivi Leino-Arjas
We identified factors protective of all-cause sickness absence (SA) among subjects with multisite musculoskeletal pain (MSP). The nationally representative source sample comprised 3420 actively working Finns aged 30-55 in year 2000 and alive at follow-up. Pain in 18 body locations was combined into four sites (neck, low back, upper limbs, lower limbs). The baseline prevalence of MSP (pain in ≥ 2 sites) was 32 %. Baseline data on sociodemographic factors, work ability, work, health, and lifestyle were gathered by questionnaire, interview and clinical examination and linked with national registers on all-cause SA (periods lasting ≥10 workdays) for 2002-2008...
October 3, 2016: Pain
Sushil Chandra, Greeshma Sharma, Mansi Sharma, Devendra Jha, Alok Pakash Mittal
Sudarshan Kriya Yoga (SKY) is a type of rhythmic breathing activity, trivially a form of Pranayama that stimulates physical, mental, emotional, and social well-being. The objective of the present work is to verify the effect of meditation in optimizing task efficiency and regulating stress. It builds on to quantitatively answer if SKY will increase workload tolerance for divided attention tasks in the people sank in it. EEG and ECG recordings were taken from a total of twenty-five subjects who had volunteered for the experiment...
July 18, 2016: Brain Informatics
Sabina Cauci, Cinzia Buligan, Micaela Marangone, Maria Pia Francescato
BACKGROUND: Oxidative stress in female athletes is understudied. We investigated oxidative stress in sportswomen of different disciplines according to combined oral contraceptive (OC) use and lifestyle/alimentary habits. METHODS: Italian sportswomen (n = 144; mean age 23.4 ± 4.2 years; body mass index 21.2 ± 2.2 kg m(-2); sport activity 9.2 ± 4.1 h week(-1)) were analyzed; 48 % were volleyball players, 12.5 % soccer players, 10.4 % track-and-field sports, and followed by other disciplines' athletes...
December 2016: Sports Medicine—Open
Barnan Das, Diane J Cook, Narayanan C Krishnan, Maureen Schmitter-Edgecombe
Caring for individuals with dementia is frequently associated with extreme physical and emotional stress, which often leads to depression. Smart home technology and advances in machine learning techniques can provide innovative solutions to reduce caregiver burden. One key service that caregivers provide is prompting individuals with memory limitations to initiate and complete daily activities. We hypothesize that sensor technologies combined with machine learning techniques can automate the process of providing reminder-based interventions...
August 2016: IEEE Journal of Selected Topics in Signal Processing
Kuo Zhang, Jingyu Yang, Fang Wang, Xing Pan, Jian Liu, Lijuan Wang, Guanyue Su, Jie Ma, Yinxu Dong, Zhili Xiong, Chufu Wu
ETHNOPHARMACOLOGICAL RELEVANCE: Hyperactivity of hypothalamic-pituitary-adrenal (HPA) axis is often observed in the pathophysiology of depression. Antidepressant therapy can restore hippocampal neurogenesis to rescue the HPA axis regulation defects. Xiaochaihutang (XCHT), a famous Chinese herbal formula, has been used clinically in depressive disorders in China. Our previous studies have demonstrated XCHT improved depressive-like behaviors in chronic unpredictable mild stress rat, but the underlying mechanisms of XCHT on hippocampal neurogenesis and the HPA axis were still unclear...
October 13, 2016: Journal of Ethnopharmacology
Julio C López-Doval, Cassiana C Montagner, Anjaína Fernandes de Alburquerque, Viviane Moschini-Carlos, Gisela Umbuzeiro, Marcelo Pompêo
Reservoirs located in urban areas suffer specific pressures related to human activities. Their monitoring, management, and protection requirements differ from reservoirs situated in non-urbanized areas. The objectives of this study were: (a) to determine the concentrations of select pesticides and emerging pollutants (EPs) present in an urban reservoir; (b) to describe their possible spatial distributions; and (c) to quantify the risks for aquatic life and safeguard drinking water supplies. For this purpose, the Guarapiranga reservoir was studied as an example of a multi-stressed urban reservoir in a tropical region...
October 13, 2016: Science of the Total Environment
M Hirschvogel, M Bassilious, L Jagschies, S M Wildhirt, M W Gee
A model for patient-specific cardiac mechanics simulation is introduced, incorporating a 3-dimensional finite element model of the ventricular part of the heart which is coupled to a reduced-order 0-dimensional closed-loop vascular system, heart valve and atrial chamber model.The ventricles are modeled by a nonlinear orthotropic passive material law. The electrical activation is mimicked by a prescribed parametrized active stress acting along a generic muscle fiber orientation. Our activation function is constructed such that the start of ventricular contraction and relaxation as well as the active stress curve's slope are parameterized...
October 15, 2016: International Journal for Numerical Methods in Biomedical Engineering
Roi Isaac, Ido Goldstein, Noa Furth, Neta Zilber, Sarina Streim, Sigalit Boura-Halfon, Eytan Elhanany, Varda Rotter, Moshe Oren, Yehiel Zick
Earlier reported small interfering RNA (siRNA) high-throughput screens, identified seven-transmembrane superfamily member 3 (TM7SF3) as a novel inhibitor of pancreatic β-cell death. Here we show that TM7SF3 maintains protein homeostasis and promotes cell survival through attenuation of ER stress. Overexpression of TM7SF3 inhibits caspase 3/7 activation. In contrast, siRNA-mediated silencing of TM7SF3 accelerates ER stress and activation of the unfolded protein response (UPR). This involves inhibitory phosphorylation of eukaryotic translation initiation factor 2α activity and increased expression of activating transcription factor-3 (ATF3), ATF4 and C/EBP homologous protein, followed by induction of apoptosis...
October 14, 2016: Cell Death and Differentiation
Matthias Schuppler, Felix C Keber, Martin Kröger, Andreas R Bausch
Cells set up contractile actin arrays to drive various shape changes and to exert forces to their environment. To understand their assembly process, we present here a reconstituted contractile system, comprising F-actin and myosin II filaments, where we can control the local activation of myosin by light. By stimulating different symmetries, we show that the force balancing at the boundaries determine the shape changes as well as the dynamics of the global contraction. Spatially anisotropic attachment of initially isotropic networks leads to a self-organization of highly aligned contractile fibres, being reminiscent of the order formation in muscles or stress fibres...
October 14, 2016: Nature Communications
Christina Devoto, Lindsay Arcurio, Joseph Fetta, Mary Ley, Tamar Rodney, Rebekah Kanefsy, Jessica Gill
Studies have shown that the presence of acute inflammation during recovery is indicative of poor outcomes after a traumatic brain injury (TBI); however, the role of chronic inflammation in predicting post-TBI related symptoms remains poorly understood. The purpose of this study was to compare inflammatory biomarkers (TNF-α, IL-6 and IL-10) in active duty personnel who either sustained or did not sustain a TBI. Service members were also assessed for post-traumatic stress disorder (PTSD), depression, and quality-of-life (QOL) through self-reported measures...
October 12, 2016: Cell Transplantation
Kathryn R Klement, Ellen M Lee, James K Ambler, Sarah A Hanson, Evelyn Comber, David Wietting, Michael F Wagner, Valerie R Burns, Bert Cutler, Nadine Cutler, Elwood Reid, Brad J Sagarin
Participation in extreme rituals (e.g., fire-walking, body-piercing) has been documented throughout history. Motivations for such physically intense activities include religious devotion, sensation-seeking and social bonding. The present study aims to explore an extreme ritual within the context of bondage/discipline, dominance/submission and sadism/masochism (BDSM): the 'Dance of Souls', a 160-person ritual involving temporary piercings with weights or hooks attached and dancing to music provided by drummers...
October 14, 2016: Culture, Health & Sexuality
Xiao-Qing Wang, Zhou-Na Li, Qi-Ming Wang, Zhonggao Gao, Zhe-Hu Jin
Keloids were characterized by excessive growth of fibrous tissues, and shared several pathological characteristics with cancer. They did put physical and emotional stress on patients in that keloids could badly change appearance of patients. N-(4-hydroxyphenyl) retinamide (4HPR) showed cytotoxic activity on a wide variety of invasive-growth cells. Our work was aim to prepare N-(4-hydroxyphenyl) retinamide-loaded lipid microbubbles (4HPR-LM) combined with ultrasound for anti-keloid therapy. 4HPR-loaded liposomes (4HPR-L) were first prepared by film evaporation method, and then 4HPR-LM were manufactured by mixing 4HPR-L and perfluoropentane (PFP) with ultrasonic cavitation method...
October 13, 2016: Journal of Liposome Research
Holly Blake, Natalia Stanulewicz, Francesca McGill
AIMS: To investigate physical activity levels of nursing and medicine students; examine predictors of physical activity level; and examine the most influential benefits and barriers to exercise. BACKGROUND: Healthcare professionals have low levels of physical activity, which increases their health risk and may influence their health promotion practices with patients. DESIGN: We surveyed 361 nursing (n=193) and medicine (n=168) students studying at a UK medical school...
October 12, 2016: Journal of Advanced Nursing
Abdulkerim Kasim Baltaci, Rasim Mogulkoc, Mustafa Akil, Mursel Bicer
Selenium (Se), which is commonly found in nature, is one of the essential trace elements necessary for the normal development of human and animal organisms. Selenium was first defined in 1818 by the Swedish chemist Berzelius in sulfuric acid residues. At the end of 1960s, the role of selenium in human health began to attract attention and human diseases that resembled animal diseases responding to selenium was started to be investigated. Selenium, which is highly important for human health, is necessary for a variety of metabolic processes, including thyroid hormone metabolism, protection against oxidative stress and immunity functions...
September 2016: Pakistan Journal of Pharmaceutical Sciences
Tzvetina Brumbarova, Rumen Ivanov
Endosomal recycling of plasma membrane proteins contributes significantly to the regulation of cellular transport and signaling processes. Members of the Arabidopsis (Arabidopsis thaliana) SORTING NEXIN (SNX) protein family were shown to mediate the endosomal retrieval of transporter proteins in response to external challenges. Our aim is to understand the possible ways through which external stimuli influence the activity of SNX1 in the root. Several proteins are known to contribute to the function of SNX1 through direct protein-protein interaction...
2016: Frontiers in Plant Science
Chelsea Anderson, Ginger L Milne, Dale P Sandler, Hazel B Nichols
Higher levels of oxidative stress, as measured by F2-isoprostanes, have been associated with chronic diseases such as CVD and some cancers. Improvements in diet and physical activity may help reduce oxidative stress; however, previous studies regarding associations between lifestyle factors and F2-isoprostane concentrations have been inconsistent. The aim of this cross-sectional study was to investigate whether physical activity and intakes of fruits/vegetables, antioxidant nutrients, dietary fat subgroups and alcohol are associated with concentrations of F2-isoprostane and the major F2-isoprostane metabolite...
October 11, 2016: British Journal of Nutrition
Ewan J Hemingway, Prashant Mishra, M Cristina Marchetti, Suzanne M Fielding
We examine the scaling with activity of the emergent length scales that control the nonequilibrium dynamics of an active nematic liquid crystal, using two popular hydrodynamic models that have been employed in previous studies. In both models we find that the chaotic spatio-temporal dynamics in the regime of fully developed active turbulence is controlled by a single active scale determined by the balance of active and elastic stresses, regardless of whether the active stress is extensile or contractile in nature...
September 28, 2016: Soft Matter
Lixia Fan, Shaopeng Pei, X Lucas Lu, Liyun Wang
The transport of fluid, nutrients, and signaling molecules in the bone lacunar-canalicular system (LCS) is critical for osteocyte survival and function. We have applied the fluorescence recovery after photobleaching (FRAP) approach to quantify load-induced fluid and solute transport in the LCS in situ, but the measurements were limited to cortical regions 30-50 μm underneath the periosteum due to the constrains of laser penetration. With this work, we aimed to expand our understanding of load-induced fluid and solute transport in both trabecular and cortical bone using a multiscaled image-based finite element analysis (FEA) approach...
2016: Bone Research
Alexis A Oetting, Nadia U Garvin, Michael R Boivin, David N Cowan
INTRODUCTION: Low levels of pre-accession physical fitness and activity are risk factors for stress fractures and other overuse musculoskeletal injuries among military trainees. One dimension in the Tailored Adaptive Personality Assessment System (TAPAS), a non-cognitive personality test given to Army applicants, specifically assesses propensity to engage in physical activity. This dimension may serve as a surrogate measure for activity or fitness. The study examines the associations between TAPAS dimension scores and risk of musculoskeletal injuries...
October 5, 2016: American Journal of Preventive Medicine
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