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flexibility and strength

Mingqiang Wang, Shuai Zhang, Yuanjun Song, Jidong Dong, Huawei Wei, Huaquan Xie, Xiaojiao Fang, Lu Shao, Yudong Huang, Zaixing Jiang
Graphene oxide nanoribbons (GONRs) are one of the most promising carbon based materials. The integration of 2D GONR sheets into macroscopic materials, such as continuous fibers or film, leads the way in translating the good properties of individual GONR sheets into macroscopic and ordered materials for future applications. In this study, we first report the fabrication of GONR fibers utilizing GONR sheets as the raw material without any supporting surfactant or polymer. The method of fabricating fibers is referred to as '3D solution printing'...
October 17, 2016: Nanotechnology
Sandra Murcia, Ellen Lavoie, Tim Linley, Arun Devaraj, E Alex Ossa, D Arola
Fish scales exhibit a unique balance of flexibility, strength and toughness, which is essential to provide protection without encumbering locomotion. Although the mechanical behavior and structure of this natural armor are of recent interest, a comparison of these qualities from scales of different fish species has not been reported. In this investigation the armor of fish with different locomotion, size and protection needs were analyzed. Scales from the Arapaima gigas, the tarpon (Megalops atlanticus) and the carp (Cyprinus carpio) were compared in terms of the stacking sequence of individual plies and their microstructure...
September 20, 2016: Journal of the Mechanical Behavior of Biomedical Materials
Fernanda de Mattos, Neiva Leite, Arthur Pitta, Paulo Cesar Barauce Bento
Water-based exercises are recommended for people with osteoarthritis (OA), due to the beneficial effects on physical function, quality of life and symptom reduction. However, the effects on muscle strength are still controversial. The aim of this review was to assess and compare the effects of Aquatic Exercise Programs on muscle strength and physical function in people with OA. A systematic search was performed at Pubmed, Scopus and Web of Science databases. Clinical trials with interventions involving Aquatic Exercises for individuals with OA were included...
September 28, 2016: Revista Brasileira de Reumatologia
Braden A W Brinkman, Alison I Weber, Fred Rieke, Eric Shea-Brown
Neural circuits reliably encode and transmit signals despite the presence of noise at multiple stages of processing. The efficient coding hypothesis, a guiding principle in computational neuroscience, suggests that a neuron or population of neurons allocates its limited range of responses as efficiently as possible to best encode inputs while mitigating the effects of noise. Previous work on this question relies on specific assumptions about where noise enters a circuit, limiting the generality of the resulting conclusions...
October 2016: PLoS Computational Biology
Li Shi, Florent Carn, François Boué, Eric Buhler
Aggregation of nanoparticles of given size R induced by addition of a polymer strongly depends on its degree of rigidity. This is shown here on a large variety of silica nanoparticle self-assemblies obtained by electrostatic complexation with carefully selected oppositely charged biopolyelectrolytes of different rigidity. The effective rigidity is quantified by the total persistence length L_{T} representing the sum of the intrinsic (L_{p}) and electrostatic (L_{e}) polyelectrolyte persistence length, which depends on the screening, i...
September 2016: Physical Review. E
Miriam K Forbes, Jennifer L Tackett, Kristian E Markon, Robert F Krueger
We propose a novel developmentally informed framework to push research beyond a focus on comorbidity between discrete diagnostic categories and to move toward research based on the well-validated dimensional and hierarchical structure of psychopathology. For example, a large body of research speaks to the validity and utility of the internalizing and externalizing spectra as organizing constructs for research on common forms of psychopathology. The internalizing and externalizing spectra act as powerful explanatory variables that channel the psychopathological effects of genetic and environmental risk factors, predict adaptive functioning, and account for the likelihood of disorder-level manifestations of psychopathology...
November 2016: Development and Psychopathology
K Karatrantou, V Gerodimos, K Häkkinen, A Zafeiridis
Combined strength and aerobic training programs are widely used for improving markers of physical fitness and health. We compared the efficiency of a serial and an integrated combined training program on health and overall fitness in middle-aged females. 54 females (46.7±4.5yrs) were assigned to a serial (SCG) or an integrated (ICG) combined training group or to a control group (CG). The SCG and ICG performed a 3-month training combining aerobic dance and calisthenics. The 2 training programs differ in the sequence of aerobic and strength exercises...
October 13, 2016: International Journal of Sports Medicine
Melanie J Gregg, Andrea Bedard
PURPOSE: A pilot study was conducted to describe the physical activity experiences and perceived benefits of and barriers to physical activity participation for patrons of a homeless shelter. The resulting pilot data may be used to inform the creation of and support for physical activity and sport programs for those experiencing homelessness. METHOD: Eighteen male patrons of a homeless shelter completed self-report questionnaires to assess psychosocial factors: global self-esteem, general self-efficacy, exercise intention and attitudes, and quality of life...
October 13, 2016: Research Quarterly for Exercise and Sport
Hsuan Su, Nai-Jen Chang, Wen-Lan Wu, Lan-Yuen Guo, I-Hua Chu
CONTEXT: Foam rolling has been proposed to improve muscle function, performance, and joint range of motion (ROM). However, whether a foam rolling protocol can be adopted as a warm-up to improve flexibility and muscle strength is unclear. OBJECTIVE: To examine and compare the acute effects of foam rolling, static stretching, and dynamic stretching used as part of warm-up on flexibility and muscle strength of knee flexion and extension. DESIGN: Crossover study...
October 13, 2016: Journal of Sport Rehabilitation
Aparna P Nanduri, Sally Fullman, Lori Morell, Steve Buyske, Mary L Wagner
BACKGROUND: Project Healthy Bones (PHB) is a 24-week, peer-led exercise and education program for older adults at risk of osteoporosis. METHOD: Residents from an assisted living and senior community program were enrolled after medical clearance. Participant demographics, geriatric fitness assessments, exercise logs, quizzes, and surveys were collected at baseline and 24 weeks. Data were analyzed using paired t tests and ANOVA of change scores for the pooled data within the R statistical environment...
October 11, 2016: Journal of Applied Gerontology: the Official Journal of the Southern Gerontological Society
Lara Allet, Olivier Giet, Jérôme Barral, Nicolas Junod, Dominique Durrer, Francesca Amati, Gerasimos P Sykiotis, Pedro Marques-Vidal, Jardena J Puder
INTRODUCTION: Low educational level (EL) and low physical fitness are both predictors of increased morbidity and mortality in patients with type 2 diabetes. It is unknown if EL is related to physical fitness. This would have important implication for the treatment approach of patients of low EL. MATERIALS AND METHODS: In 2011/12, we invited participants of a new nationwide Swiss physical activity program for patients with type 2 diabetes to participate in this study...
2016: PloS One
Nicola C Byrom, Robin A Murphy
Individuals differ in their ability to acquire associations between stimuli and paired outcomes, an ability that has been proposed to be independent of general metrics of intelligence or memory (e.g., Kaufman, DeYoung, Gray, Brown, & Mackintosh, 2009). The nature of these differences may reflect the type of associative structures acquired during learning, for instance, configuring stimuli to facilitate flexible learning and memory. We test the hypothesis that individuals differ in configural associative learning as distinct from simpler (elemental) stimulus-outcome learning...
October 2016: Journal of Experimental Psychology. Animal Learning and Cognition
Yuqi Li, Hui Zhang, Mizi Fan, Jiandong Zhuang, Lihui Chen
Oil-water separation has recently become an important subject due to the increasing incidence of oil spills. Materials with underwater superoleophobic properties have aroused considerable interest due to their cost-effectiveness, environmental friendliness and anti-fouling properties. This paper presents a robust salt-tolerant superoleophobic aerogel inspired by seaweed used without any further chemical modification for oil-seawater separation. The green aerogel is prepared by freeze-drying of sodium alginate (SA)-nanofibrillated cellulose (NFC) using Ca(2+) ions as the crosslinking agent...
September 14, 2016: Physical Chemistry Chemical Physics: PCCP
Keiichi Moromizato, Ryosuke Kimura, Hitoshi Fukase, Kyoko Yamaguchi, Hajime Ishida
BACKGROUND: Understanding the whole-body patterns of joint flexibility and their related biological and physical factors contributes not only to clinical assessments but also to the fields of human factors and ergonomics. In this study, ranges of motion (ROMs) at limb and trunk joints of young adults were analysed to understand covariation patterns of different joint motions and to identify factors associated with the variation in ROM. METHODS: Seventy-eight healthy volunteers (42 males and 36 females) living on Okinawa Island, Japan, were recruited...
October 1, 2016: Journal of Physiological Anthropology
Chayanika Das, Kothandam Krishnamoorthy
Flexible micro-supercapacitors are needed to power ultra-small wearable electronic devices. Silk cocoons comprise microfibers of silk, which are an attractive natural resource to fabricate micro-supercapacitors (MSCs). These fibers are insulators, hence, they must be converted to conducting surfaces. Polyphenols from green tea have been used as a protective layer that also acted as a reducing agent to silver ion. The reduction of silver ion resulted in the formation of silver nanoparticles that subsequently reduced gold ions to gold...
October 7, 2016: ACS Applied Materials & Interfaces
Ana Oliveira, Ângela Monteiro, Cristina Jácome, Vera Afreixo, Alda Marques
Group sports interventions have been developed to improve health-related physical fitness of overweight/obese youth. However, its benefits are not systematically documented. This study synthesizes the evidence about the effects of group sports on health-related physical fitness of overweight/obese youth. Pubmed, Web of Knowledge, Scopus, Medline, CINAHL, SportDiscus, and Academic Search Complete were searched in February 2016. Studies assessing the effects of group sports on body composition, cardiorespiratory endurance, muscle strength, flexibility, and neuromotor fitness of overweight/obese youth (aged <18 years) were included...
October 7, 2016: Scandinavian Journal of Medicine & Science in Sports
C C A Santana, L B Azevedo, M T Cattuzzo, J O Hill, L P Andrade, W L Prado
Physical fitness (PF) is a construct of health- and skill-related attributes which have been associated with academic performance (AP) in youth. This study aimed to review the scientific evidence on the association among components of PF and AP in children and adolescents. A systematic review of articles using databases PubMed/Medline, ERIC, LILACS, SciELO, and Web of Science was undertaken. Cross-sectional and longitudinal studies examining the association between at least one component of PF and AP in children and adolescents, published between 1990 and June 2016, were included...
October 7, 2016: Scandinavian Journal of Medicine & Science in Sports
James E East, Jasper L Vleugels, Philip Roelandt, Pradeep Bhandari, Raf Bisschops, Evelien Dekker, Cesare Hassan, Gareth Horgan, Ralf Kiesslich, Gaius Longcroft-Wheaton, Ana Wilson, Jean-Marc Dumonceau
Background and aim: This technical review is an official statement of the European Society of Gastrointestinal Endoscopy (ESGE). It addresses the utilization of advanced endoscopic imaging in gastrointestinal (GI) endoscopy. Methods: This technical review is based on a systematic literature search to evaluate the evidence supporting the use of advanced endoscopic imaging throughout the GI tract. Technologies considered include narrowed-spectrum endoscopy (narrow band imaging [NBI]; flexible spectral imaging color enhancement [FICE]; i-Scan digital contrast [I-SCAN]), autofluorescence imaging (AFI), and confocal laser endomicroscopy (CLE)...
October 6, 2016: Endoscopy
Zijian Zheng, Fanzhu Li, Hongji Liu, Jianxiang Shen, Jun Liu, Youping Wu, Liqun Zhang, Wenchuan Wang
Introducing carbon nanotubes or graphene sheets into polymer matrices has received lots of scientific and technological attention. For the first time, we report a new kind of polymer nanocomposite (PNC) by means of employing anisotropic nanoparticles (NPs) as netpoints (referred to as an end-linked system), namely with NPs acting as netpoints to chemically connect the dual end-groups of each polymer chain to form a network. By taking advantage of this strategy, the anisotropic NPs can be uniformly distributed in the polymer matrix, with the NPs being separated via the connected polymer chains...
September 14, 2016: Physical Chemistry Chemical Physics: PCCP
Vibeke Krane, Bengt Karlsson, Ottar Ness, Per-Einar Binder
The aim of this study was to explore how teachers and helpers experience that teacher-student relationship (TSR) is developed and promoted in upper secondary school.We also explored their experiences of qualities of TSR with students with mental health problems or at risk of dropping out. The study used a qualitative and participative approach; key stakeholders were included as co-researchers. Focus group interviews were held with 27 teachers and helpers. A thematic analysis was conducted. The participants' descriptions of important experiential dimensions of TSR were clustered around four themes: (1) to be recognized as a person with strengths and challenges in everyday life, (2) collaborative relationships between students and teachers, (3) flexible boundaries in the relationship between teachers and students and (4) organization of classes and procedures set the stage for TSR...
2016: International Journal of Qualitative Studies on Health and Well-being
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