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Static stretching

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https://www.readbyqxmd.com/read/28409517/could-the-negative-effects-of-static-stretching-in-warm-up-be-restored-by-sport-specific-exercise
#1
Victor Bengtsson, Ji-Guo Yu, Kajsa Gilenstam
BACKGROUND: Static stretching (SS) is widely used in warm-up as it is generally believed to increase mobility and reduce the risk of injury; however, SS has been shown to induce transient negative effects on subsequent muscle performance. Interestingly, recent studies have shown that sport specific exercise could restore SS-induced negative effects on certain sports, especially of explosive muscular performance. Whether sport specific exercise could restore SS-induced negative effects on isokinetic muscle performance remains unclear...
April 13, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28409512/immediate-effects-of-different-types-of-stretching-exercises-on-badminton-jump-smash
#2
Hwi S Jang, Daeho Kim, Jihong Park
BACKGOUND: Since different types of stretching exercises may alter athletic performance, we compared the effects of three types of stretching exercises on badminton jump smash. METHODS: Sixteen male collegiate badminton players performed one of three different stretching exercises in a counterbalanced order on different days. Static stretching had seven typical stretches, while dynamic stretching involved nine dynamic movements, and resistance dynamic stretching was performed with weighted vests and dumbbells...
April 13, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28397006/acute-effect-of-stretching-one-leg-on-regional-arterial-stiffness-in-young-men
#3
Yosuke Yamato, Natsuki Hasegawa, Shumpei Fujie, Shigehiko Ogoh, Motoyuki Iemitsu
PURPOSE: Our previous study demonstrated that a single bout of stretching exercises acutely reduced arterial stiffness. We hypothesized that this acute vascular response is due to regional mechanical stimulation of the peripheral arteries. To test this hypothesis, we examined the effect of a single bout of passive one leg stretching on arterial stiffness, comparing the stretched and the non-stretched leg in the same subject. METHODS: Twenty-five healthy young men (20...
April 10, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28395147/acute-effect-of-stretching-modalities-on-global-coordination-and-kicking-accuracy-in-12-13year-old-soccer-players
#4
Mohamed Frikha, Mohammad S Derbel, Nesrine Chaâri, Adnene Gharbi, Karim Chamari
The aim of the study was to compare the effect of stretching procedures on global coordination and accuracy in instep soccer kicks achieved in different stress conditions. Twenty male young soccer players completed the global coordination test (GC), the instep kicking accuracy test in free (FKA) and in time-pressure (TPKA) conditions, either after static (SS), dynamic (DS), ballistic (BS) or no-stretching (CTR) protocols, on nonconsecutive days and in a randomized order. After performing a 5min standardized intensity jogging (70% of MAV), followed by stretching exercises for 10min, each participant completed, successively, the GC, FKA and TPKA tests...
April 7, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28394655/stretch-induced-apoptosis-in-rat-alveolar-epithelial-cells-is-mediated-by-the-intrinsic-mitochondrial-pathway
#5
Hartmut Kuhn, Hendrik Nieuwenhuijsen, Bianca Karthe, Hubert Wirtz
BACKGROUND: Alveolar type II (ATII) cells in the lung are exposed to mechanical stretch during breathing and mechanical ventilation. Increased mechanical stretch contributes to lung injury by induction of apoptosis and necrosis in ATII cells. AIM OF THE STUDY: In this study, we investigated the intrinsic and the extrinsic apoptosis pathways, and their involvement in our model of stretch-induced apoptosis. MATERIAL AND METHODS: ATII cells were stretched on elastic membranes for 24 h and apoptosis was determined at different time points...
February 2017: Experimental Lung Research
https://www.readbyqxmd.com/read/28380974/waveguiding-characteristics-of-surface-enhanced-raman-scattering-signals-along-crystalline-organic-semiconducting-microrod
#6
Seong Gi Jo, Bong Gi Kim, Jinsang Kim, JeongYong Kim, Jinsoo Joo
The waveguiding of surface enhanced Raman scattering (SERS) signals was demonstrated by using organic semiconducting microrods (MRs) hybridized with functionalized gold nanoparticles (Au-NPs). Organic semiconducting 1,4-bis(3,5-bis(trifluoromethyl) styryl)-2,5-dibromobenzene (TSDB) crystalline MRs were fabricated as active optical waveguiding system using a self-assembly method. The static SERS effect and the enhancement of photoluminescence were simultaneously observed for the TSDB MRs hybridized with Au-NPs...
March 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28366004/physicochemical-evidences-on-the-sublethal-neonicotinoid-imidacloprid-interacting-with-an-odorant-binding-protein-from-the-tea-geometrid-moth-ectropis-obliqua
#7
Hongliang Li, Lei Zhao, Xiaobin Fu, Xinmi Song, Fan Wu, Mingzhu Tang, Hongchun Cui, Jizhong Yu
Nowadays the excessive usage of neonicotinoid insecticides always results in the residues in Chinese tea fields. It is not clear whether the insecticide residue at the sublethal level influence on the physiological processes of tea pests. Here, we provided the interacting evidences between neonicotinoid imidacloprid and a general odorant-binding protein, EoblGOBP2, from the tea geometrid moth, Ectropis obliqua. The interacting process was demonstrated through multiple fluorescence spectra, UV absorption spectra, circular dichroism (CD) spectra and molecular docking, etc...
April 2, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28364981/heightened-pelvic-floor-muscle-tone-and-altered-contractility-in-women-with-provoked-vestibulodynia
#8
Mélanie Morin, Yitzchak M Binik, Daniel Bourbonnais, Samir Khalifé, Stéphane Ouellet, Sophie Bergeron
BACKGROUND: Pelvic floor muscle (PFM) dysfunctions are reported to be involved in provoked vestibulodynia (PVD). Although heightened PFM tone has been suggested, the relative contribution of active and passive components of tone remains misunderstood. Likewise, alterations in PFM contractility have been scarcely studied. AIMS: To compare PFM tone, including the relative contribution of its active and passive components, and muscular contractility in women with PVD and asymptomatic controls...
April 2017: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/28358962/vegf-as-a-paracrine-regulator-of-conventional-outflow-facility
#9
Ester Reina-Torres, Joanne C Wen, Katy C Liu, Guorong Li, Joseph M Sherwood, Jason Y H Chang, Pratap Challa, Cassandra M Flügel-Koch, W Daniel Stamer, R Rand Allingham, Darryl R Overby
Purpose: Vascular endothelial growth factor (VEGF) regulates microvascular endothelial permeability, and the permeability of Schlemm's canal (SC) endothelium influences conventional aqueous humor outflow. We hypothesize that VEGF signaling regulates outflow facility. Methods: We measured outflow facility (C) in enucleated mouse eyes perfused with VEGF-A164a, VEGF-A165b, VEGF-D, or inhibitors to VEGF receptor 2 (VEGFR-2). We monitored VEGF-A secretion from human trabecular meshwork (TM) cells by ELISA after 24 hours of static culture or cyclic stretch...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28355630/inferring-the-stiffness-of-unfamiliar-objects-from-optical-shape-and-motion-cues
#10
Filipp Schmidt, Vivian C Paulun, Jan Jaap R van Assen, Roland W Fleming
Visually inferring the stiffness of objects is important for many tasks but is challenging because, unlike optical properties (e.g., gloss), mechanical properties do not directly affect image values. Stiffness must be inferred either (a) by recognizing materials and recalling their properties (associative approach) or (b) from shape and motion cues when the material is deformed (estimation approach). Here, we investigated interactions between these two inference types. Participants viewed renderings of unfamiliar shapes with 28 materials (e...
March 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28351803/establishing-a-reliable-gait-evaluation-method-for-rodent-studies
#11
Huanwen Chen, Jian Du, Yifan Zhang, Kevin Barnes, Xiaofeng Jia
BACKGROUND: CatWalk is one of the most popular tools for evaluating gait recovery in preclinical research, however, there is currently no consensus on which of the many gait parameters captured by CatWalk can reliably model recovery. There are conflicting interpretations of results, along with many common but seldom reported problems such as heel walking and poor compliance. NEW METHOD: We developed a systematic manual classification method that overcomes common problems such as heel walking and poor compliance...
March 27, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28349928/corrugated-textile-based-triboelectric-generator-for-wearable-energy-harvesting
#12
A Young Choi, Chang Jun Lee, Jiwon Park, Dogyun Kim, Youn Tae Kim
Triboelectric energy harvesting has been applied to various fields, from large-scale power generation to small electronics. Triboelectric energy is generated when certain materials come into frictional contact, e.g., static electricity from rubbing a shoe on a carpet. In particular, textile-based triboelectric energy-harvesting technologies are one of the most promising approaches because they are not only flexible, light, and comfortable but also wearable. Most previous textile-based triboelectric generators (TEGs) generate energy by vertically pressing and rubbing something...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28344445/effects-of-static-and-dynamic-stretching-on-the-isokinetic-peak-torques-and-electromyographic-activities-of-the-antagonist-muscles
#13
Abdullah Serefoglu, Ufuk Sekir, Hakan Gür, Bedrettin Akova
The aim of this study was to investigate if static and dynamic stretching exercises of the knee muscles (quadriceps and hamstring muscles) have any effects on concentric and eccentric isokinetic peak torques and electromyographic amplitudes (EMG) of the antagonist muscles. Twenty healthy male athletes (age between 18-30 years) voluntarily participated in this study. All of the subjects visited the laboratory to complete the following intervention in a randomized order on 5 separate days; (a) non-stretching (control), (b) static stretching of the quadriceps muscles, (c) static stretching of the hamstring muscles, (d) dynamic stretching of the quadriceps muscles, and (e) dynamic stretching of the hamstring muscles...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28319528/postburn-microstomia-prevention-using-an-appliance-providing-simultaneous-horizontal-and-vertical-adjustable-forces
#14
Gregory S Antonarakis, Sandra Fastlicht, Taras Masnyi, Bryan Tompson
Microstomia, an abnormally small oral orifice, is a complication of perioral facial burns. In this case, contraction of the circumoral tissues and hypotonia of the musculature is responsible for this microstomia, which can produce aesthetic and functional impairment with eating, swallowing, communication (speech and facial expressions), compromised dental care and maintenance due to limited oral access, social interactions, and psychological well-being. Conservative management involves providing physical resistance to scar contracture, with opposing horizontal and vertical circumoral forces by means of appliances that aim to stretch the commissures and fibrotic muscles...
March 13, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28290280/combined-effect-of-shearing-and-cooling-rate-on-the-rheology-of-organogels-developed-by-selected-gelators
#15
A De la Peña-Gil, F M Álvarez-Mitre, M M González-Chávez, M A Charó-Alonso, J F Toro-Vazquez
In this study we investigated the combined effect of shearing and cooling rate in the rheology of organogels developed in high oleic safflower oil by (R)-12-hydroxystearic acid (HSA), its primary amide derivative [(R)-12-hydroxyoctadecanamide, HOA], and the N-octadecyl derivative of HOA [(R)-N-octadecyl-12-hydroxyoctadecanamide, OHOA]. The experimental set up to develop the organogels involved: 1). The use of quiescent (0s(-1)) or shearing (300, 600, and 1200s(-1)) conditions during cooling the gelator solutions (2%) just until achieving the gelator's melting temperature (TM) in the vegetable oil, to then continuing the cooling under static conditions until achieving 15°C) The use of cooling rate protocols involving a constant cooling rate of 1°C/min (CR1) or 10°C/min (CR10) in the shearing and static stages, or variable cooling rates in each stage (i...
March 2017: Food Research International
https://www.readbyqxmd.com/read/28288544/dynamic-range-of-motion-hindlimb-stretching-disrupts-locomotor-function-in-rats-with-moderate-subacute-spinal-cord-injuries
#16
Anastasia Valerievna Keller, Kathlene Marie Rees, Daniella Christina Prince, Johnny R Morehouse, Alice Shum-Siu, David Sk Magnuson
Joint contractures and spasticity are two common secondary complications of a severe spinal cord injury (SCI) that can significantly reduce quality of life and stretching is one of the top strategies for rehabilitation of these complications. We have previously shown that a daily static stretching protocol administered to rats at either acute or chronic time points after a moderate or moderate-severe T10 SCI significantly disrupts their hindlimb locomotor function. The objective of the current study was to examine the effects of dynamic range of motion stretching on the locomotor function of rats with SCI as an alternative to static stretching...
March 13, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28287021/evaluation-of-a-static-stretching-intervention-on-vascular-endothelial-function-and-arterial-stiffness
#17
Hiromi Shinno, Satoshi Kurose, Yutaka Yamanaka, Kyoko Higurashi, Yaeko Fukushima, Hiromi Tsutsumi, Yutaka Kimura
PURPOSE: Maintenance and enhancement of vascular endothelial function contribute to the prevention of cardiovascular disease and prolong a healthy life expectancy. Given the reversible nature of vascular endothelial function, interventions to improve this function might prevent arteriosclerosis. Accordingly, we studied the effects of a 6-month static stretching intervention on vascular endothelial function (reactive hyperaemia peripheral arterial tonometry index: RH-PAT index) and arterial stiffness (brachial-ankle pulse wave velocity: baPWV) and investigated the reversibility of these effects after a 6-month detraining period following intervention completion...
March 13, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28280975/the-effect-of-nordic-hamstring-strength-training-on-muscle-architecture-stiffness-and-strength
#18
Kayla D Seymore, Zachary J Domire, Paul DeVita, Patrick M Rider, Anthony S Kulas
PURPOSE: Hamstring strain injury is a frequent and serious injury in competitive and recreational sports. While Nordic hamstring (NH) eccentric strength training is an effective hamstring injury-prevention method, the protective mechanism of this exercise is not understood. Strength training increases muscle strength, but also alters muscle architecture and stiffness; all three factors may be associated with reducing muscle injuries. The purpose of this study was to examine the effects of NH eccentric strength training on hamstring muscle architecture, stiffness, and strength...
March 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28274273/acute-effects-of-foam-rolling-on-passive-tissue-stiffness-and-fascial-sliding-study-protocol-for-a-randomized-controlled-trial
#19
Frieder Krause, Jan Wilke, Daniel Niederer, Lutz Vogt, Winfried Banzer
BACKGROUND: Self-myofascial release (SMR) aims to mimic the effects of manual therapy and tackle dysfunctions of the skeletal muscle and connective tissue. It has been shown to induce improvements in flexibility, but the underlying mechanisms are still poorly understood. In addition to neuronal mechanisms, improved flexibility may be driven by acute morphological adaptations, such as a reduction in passive tissue stiffness or improved movement between fascial layers. The aim of the intended study is to evaluate the acute effects of SMR on the passive tissue stiffness of the anterior thigh muscles and the sliding properties of the associated fasciae...
March 9, 2017: Trials
https://www.readbyqxmd.com/read/28268750/a-wearable-skin-stretch-haptic-feedback-device-towards-improving-balance-control-in-lower-limb-amputees
#20
M A B Husman, H F Maqbool, M I Awad, A Abouhossein, A A Dehghani-Sanij
Haptic feedback to lower limb amputees is essential to maximize the functionality of a prosthetic device by providing information to the user about the interaction with the environment and the position of the prostheses in space. Severed sensory pathway and the absence of connection between the prosthesis and the Central Nervous System (CNS) after lower limb amputation reduces balance control, increases visual dependency and increases risk of falls among amputees. This work describes the design of a wearable haptic feedback device for lower limb amputees using lateral skin-stretch modality intended to serve as a feedback cue during ambulation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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