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Strength resistance

Stefano Benítez-Flores, André R Medeiros, Fabrício Azevedo Voltarelli, Eliseo Iglesias-Soler, Kenji Doma, Herbert G Simões, Thiago Santos Rosa, Daniel A Boullosa
PURPOSE: The aim of this study was to compare the combined effects of resistance and sprint training, with very short efforts (5 s), on aerobic and anaerobic performances, and cardiometabolic health-related parameters in young healthy adults. METHODS: Thirty young physically active individuals were randomly allocated into four groups: resistance training (RTG), sprint interval training (SITG), concurrent training (CTG), and control (CONG). Participants trained 3 days/week for 2 weeks in the high-intensity interventions that consisted of 6-12 "all out" efforts of 5 s separated by 24 s of recovery, totalizing ~ 13 min per session, with 48-72 h of recovery between sessions...
March 16, 2019: European Journal of Applied Physiology
Rodrigo Martins Pereira, Kellen Cristina da Cruz Rodrigues, Chadi Pellegrini Anaruma, Marcella Ramos Sant'Ana, Thaís Dantis Pereira de Campos, Rodrigo Stellzer Gaspar, Raphael Dos Santos Canciglieri, Diego Gomes de Melo, Rania A Mekary, Adelino Sanchez Ramos da Silva, Dennys Esper Cintra, Eduardo Rochete Ropelle, José Rodrigo Pauli, Leandro Pereira de Moura
Non-alcoholic fatty liver disease (NAFLD) has a positive correlation with obesity, insulin resistance and type 2 diabetes mellitus (T2D). The aerobic training is an important tool in combating NAFLD. However, no studies have demonstrated the molecular effects of short-term strength training on the accumulation of hepatic fat in obese mice. This study aimed to investigate the effects of short-term strength training on the mechanisms of oxidation and lipid synthesis in the liver of obese mice. The short duration protocol was used to avoid changing the amount of adipose tissue...
April 1, 2019: Journal of Endocrinology
Susan Högg, Manfred Holzgraefe, Insa Wingendorf, Jan Mehrholz, Christoph Herrmann, Mark Obermann
BACKGROUND: Stroke patients are often affected by arm paresis, have functional impairments and receive help from professional or informal caregivers. Progressive resistance training is a common intervention for functional impairments after paresis. Randomised controlled trials (RCT) showed benefits for functional recovery after resistance training. However, there is a lack of evidence for strength training in subacute stroke patients. The aim of this study is to investigate safety and effectiveness of arm strength training in subacute stroke patients...
March 15, 2019: Trials
Shenghui Tian, Yuanfang Luo, Jizun Chen, Hui He, Yong Chen, Zhang Ling
In this study, non-metallic materials of waste-printed circuit board powders (WPCBP) were successfully used as reinforcing filler to produce polypropylene (PP)⁻wood composites, and their effect on the weathering properties of PP composites were fully evaluated via oxidation induction time (OIT), attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR), differential scanning calorimetry, vicat softening point (VST), scanning electron microscopy, and mechanical properties analysis. The OIT analysis confirmed that the anti-thermal oxidative aging properties of PP⁻wood composites were decreased with the loading of WPCBP...
March 15, 2019: Materials
Nils Eckardt, Noah J Rosenblatt
Locomotor stability is challenged by internal perturbations, e.g., motor noise, and external perturbations, e.g., changes in surface compliance. One means to compensate for such perturbations is to employ motor synergies, defined here as co-variation among a set of elements that acts to stabilize, or provide similar trial-to-trial (or step-to-step) output, even in the presence of small variations in initial conditions. Whereas evidence exists that synergies related to the upper extremities can be trained, the extent to which lower limb synergies, such as those which may be needed to successfully locomote in complex environments, remains unknown...
2019: Frontiers in Aging Neuroscience
Jia Li, Zhe Zhao, Pengbin Yin, Licheng Zhang, Peifu Tang
BACKGROUND: Current surgical interventions for the femoral neck fracture are using either cannulated screws (CCS) or a single large screw at a fixed angle with a side-plate (i.e., a sliding hip screw, AKA dynamic hip screw, DHS). Despite these interventions, the need for reoperation remains high (10.0-48.8%) and largely unchanged over the past 30 years. Femoral neck fracture is associated with substantial morbidity, mortality, and costs. METHODS: In this study, our group designed a plate that combines the strength of both CCS and sliding hip screw, through providing three dynamic screws at a fixed angle with a side-plate, namely the slide compression anatomic place-femoral neck (SCAP-FN)...
March 12, 2019: Journal of Orthopaedic Surgery and Research
Arianna De Mori, Meena Hafidh, Natalia Mele, Rahmi Yusuf, Guido Cerri, Elisabetta Gavini, Gianluca Tozzi, Eugen Barbu, Mariateresa Conconi, Roger R Draheim, Marta Roldo
One-dimensional nanostructures, such as silver nanowires (AgNWs), have attracted considerable attention owing to their outstanding electrical, thermal and antimicrobial properties. However, their application in the prevention of infections linked to bone tissue regeneration intervention has not yet been explored. Here we report on the development of an innovative scaffold prepared from chitosan, composite hydroxyapatite and AgNWs (CS-HACS-AgNWs) having both bioactive and antibacterial properties. In vitro results highlighted the antibacterial potential of AgNWs against both gram-positive and gram-negative bacteria...
March 12, 2019: Pharmaceutics
Anna Wyrostek, Katarzyna Czyż, Bożena Patkowska-Sokoła, Marzena Janczak
The aim of this study was to determine selected characteristics of hair originating from adult females of three primate species: lar gibbon, crested black macaque and common chimpanzee. The research material consisted of 300 hairs collected from the top of the head. The analysis included the length, diameter, strength, breaking load, elongation and cross-section area of the hairs, and the hair index. Additionally, the scale number per 1 mm of hair length was determined using scanning electron microscope images...
March 14, 2019: Folia Primatologica; International Journal of Primatology
Miriam Byrne, Al Aly
Surgeons must select the optimal suture materials for tissue approximation to maximize wound healing and scar aesthetics. Thus, knowledge regarding their characteristics is crucial to minimize ischaemia, excess wound tension, and tissue injury. This article describes the selection of various suture materials available today and their intended design. Modern suture material should have predictable tensile strength, good handling, secure knot-tying properties, and could be enhanced with an antibacterial agent to resist infection...
March 14, 2019: Aesthetic Surgery Journal
Zuoli He, Gengheng Zhou, Joon-Hyung Byun, Sang-Kwan Lee, Moon-Kwang Um, Byeongjin Park, Taehoon Kim, Sang Bok Lee, Tsu-Wei Chou
Here, we report a novel highly sensitive wearable strain sensor based on a highly stretchable multi-walled carbon nanotube (MWCNT)/Thermoplastic Polyurethane (TPU) fiber obtained via a wet spinning process. The MWCNT/TPU fiber showed the highest tensile strength and ultra-high sensitivity with a gauge factor (GF) of approximately 2800 in the strain range of 5-100%. Due to its high strain sensitivity of conductivity, this CNT-reinforced composite fiber was able to be used to monitor the weight and shape of an object based on the 2D mapping of resistance changes...
March 14, 2019: Nanoscale
Jinjun Deng, Weihua Wang, Liuan Hui, Jietong Zhang, Xinhang Jin
To solve the current problems with thin-film thermocouple signals on turbine blades in ultra-high temperature environments, this study explores the use of a through-hole lead connection technology for high-temperature resistant nickel alloys. The technique includes through-hole processing, insulation layer preparation, and filling and fixing of a high-temperature resistant conductive paste. The through-hole lead connection preparation process was optimized by investigating the influence of the inner diameter of the through-hole, solder volume, and temperature treatment on the contact strength and surface roughness of the thin-film for contact resistance...
March 7, 2019: Sensors
Juan Yang, Gai-Fei Peng, Guo-Shuang Shui, Gui Zhang
Experimental investigations on the mechanical properties of ultra-high performance concrete (UHPC) incorporating two types of recycled steel fiber processed from waste tires and three types of industrial steel fiber were carried out for comparison. Mechanical properties of UHPC include compressive strength, splitting tensile strength, fracture energy, and elastic modulus. Their explosive spalling behaviors under high temperatures were also investigated. The results show that all types of steel fiber exhibit a beneficial effect on the mechanical properties and the anti-spalling behavior of UHPC, except that recycled steel fiber with rubber attached (RSFR) has a slightly negative effect on the compressive strength of UHPC...
March 7, 2019: Materials
Erick M Souza, José de Ribamar P Quadros, Emmanuel J N L Silva, Gustavo De-Deus, Felipe G Belladonna, Etevaldo M Maia-Filho
The aim of this study was to evaluate whether amplifying the volume and/or time of contact of NaOCl affects the fracture strength of endodontically treated bovine teeth. Four bovine incisors from 10 animals were allocated into 4 groups using a split-mouth design. Root canals were instrumented using a sequence of 4 manual stainless steel files and irrigated with a 5.25% alkalized NaOCl solution. The total volume and time of irrigation, per sample, varied among the groups as following: standard volume and time of contact - 15 mL/11...
January 2019: Brazilian Dental Journal
Maria Dzierżyńska, Emilia Sikorska, Aneta Pogorzelska, Ewa Mulkiewicz, Justyna Sawicka, Dariusz Wyrzykowski, Izabela Małuch, Anders Grubb, Franciszek Kasprzykowski, Sylwia Rodziewicz-Motowidło
BACKGROUND: Antibacterial peptidyl derivative - Cystapep 1, was previously found to be active both against antibiotic-resistant staphylococci and streptococci as well as antibiotic-susceptible strains of these species. Therefore, it is a promising lead compound to search for new antimicrobial peptidomimetics. OBJECTIVES: We focused on identifying structural elements that are responsible for the biological activity of Cystapep 1 and its five analogues. We tried to find an answer to the question about the mechanism of action of the tested compounds...
March 11, 2019: Protein and Peptide Letters
Minoru Yamada, Yosuke Kimura, Daisuke Ishiyama, Naohito Nishio, Yuhei Otobe, Tomoya Tanaka, Shunsuke Ohji, Shingo Koyama, Atsushi Sato, Mizue Suzuki, Hideyuki Ogawa, Takeo Ichikawa, Daisuke Ito, Hidenori Arai
AIM: The objective of this trial was to investigate the synergistic effects of bodyweight resistance exercise and a protein supplement with vitamin D on skeletal muscle in sarcopenic or dynapenic older adults. METHODS: This was a four-arm randomized controlled trial. Sarcopenic or dynapenic older adults were recruited for this trial. After screening, a total of 112 older adults were randomly allocated among four groups; 28 older adults each were enrolled in the combined resistance exercise and nutritional supplementation group, the exercise alone group, the nutritional supplementation alone group, and the control group...
March 13, 2019: Geriatrics & Gerontology International
Anna Ciupak, Agata Dziwulska-Hunek, Bożena Gładyszewska, Anita Kwaśniewska
The seasonal senescence of leaves in the phenological cycle coincides with the change of their strength properties which determine resistance to environmental conditions and the efficiency of the photosynthesis process. That affects the development, growth and condition of the plant. Therefore, the aim of this paper was to observe and compare the results of strength tests performed on the leaves of two species of trees popular in Poland - lime and maple. As well as chlorophyll fluorescence and photosynthetic pigments content in the context of the changes occurring during the entire leaf life cycle...
March 12, 2019: Scientific Reports
Anna Externbrink, Satish Sharan, Dajun Sun, Wenlei Jiang, David Keire, Xiaoming Xu
The introduction of prescription opioids with abuse-deterrent (AD) properties to the marketplace has created a need for new testing methodologies to evaluate the performance of potentially abuse-deterrent opioid products. Drug abusers may attempt to chew solid oral extended-release (ER) opioids prior to ingestion to bypass the ER mechanism of the formulation to achieve euphoria. In the present study, a chewing apparatus was utilized to develop an in vitro chewing method for Hysingla ER tablets, a prescription opioid with labeling describing abuse deterrence via the oral route when chewed...
March 9, 2019: International Journal of Pharmaceutics
Mastali Mohammad, Kinnunen Paivo, Karhu Marjaana, Abdollahnejad Zahra, Korat Lidija, Ducman Vilma, Alzaza Ahmad, Illikainen Mirja
This paper presents experimental results regarding the efficiency of using acoustic panels made with fiber-reinforced alkali-activated slag foam concrete containing lightweight recycled aggregates produced by using Petrit-T (tunnel kiln slag). In the first stage, 72 acoustic panels with dimension 500 × 500 × 35 mm were cast and prepared. The mechanical properties of the panels were then assessed in terms of their compressive and flexural strengths. Moreover, the durability properties of acoustic panels were studied using harsh conditions (freeze/thaw and carbonation tests)...
March 11, 2019: Materials
Lanbing Liu, Chao Ding, Yunhui Mei, Guoquan Lu
Additive manufacturing (AM), or 3D-printing, has the potential for rapid prototyping of innovative designs of magnetic components used in power electronics converters. In this study, we tailored a silver paste as the metal feedstock of an extrusion 3D printer so that the metal would be compatible with a ferrite paste feedstock for 3D-printing of ferrite magnetic components. We focused on adjusting the metal formulation to match its shrinkage to that of the ferrite and to improve adhesion during the co-sintering process of the printed part...
March 11, 2019: Materials
Mohamad Zul Hilmey Makmud, Hazlee Azil Illias, Ching Yern Chee, Sameh Ziad Ahmad Dabbak
This study provides a thorough investigation of partial discharge (PD) activities in nanofluid insulation material consisting of different types of nanoparticles, which are conductive and semiconductive when subjected to high voltage stress is presented. Nanofluids have become a topic of interest because they can be an alternative to liquid insulation in electrical apparatus due to their promising dielectric strength and cooling ability. However, during in-service operation, PDs can occur between conductors in the insulation system...
March 11, 2019: Materials
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