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https://www.readbyqxmd.com/read/28428033/a-critical-analysis-of-limb-symmetry-indices-of-hop-tests-in-athletes-after-anterior-cruciate-ligament-reconstruction-a-case-control-study
#1
Alli Gokeler, Wouter Welling, Anne Benjaminse, Koen Lemmink, Romain Seil, Stefano Zaffagnini
BACKGROUND: Hop tests are frequently used to determine return to sports (RTS) after anterior cruciate ligament reconstruction (ACLR). Given that bilateral deficits are present after ACLR, this may result in a falsely high limb symmetry index (LSI), since LSI is calculated as a ratio between the values of the limbs. HYPOTHESIS: Athletes after ACLR would achieve LSI > 90% for the hop test. Secondly, athletes after ACLR demonstrate decreased jump distance on the single hop for distance (SLH) and triple leg hop for distance (TLH) and decreased number of hops for the side hop (SH) for both involved and uninvolved limbs compared to normative data of sex, age and type of sports matched healthy athletes...
April 17, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28402361/electronic-characterization-of-geobacter-sulfurreducens-pilins-in-self-assembled-monolayers-unmasks-tunnelling-and-hopping-conduction-pathways
#2
Krista M Cosert, Rebecca J Steidl, Angelines Castro-Forero, Robert M Worden, Gemma Reguera
The metal-reducing bacterium Geobacter sulfurreducens produces protein nanowires (pili) for fast discharge of respiratory electrons to extracellular electron acceptors such as iron oxides and uranium. Charge transport along the pili requires aromatic residues, which cluster once the peptide subunits (pilins) assemble keeping inter-aromic distances and geometries optimal for multistep hopping. The presence of intramolecular aromatic contacts and the predominantly α-helical conformation of the pilins has been proposed to contribute to charge transport and rectification...
April 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28392409/a-rapid-isothermal-assay-for-the-detection-of-hop-stunt-viroid-in-hop-plants-humulus-lupulus-and-its-application-in-disease-surveys
#3
Madhu Kappagantu, Dan Edward V Villamor, Jeff M Bullock, Kenneth C Eastwell
Hop stunt disease caused by Hop stunt viroid (HSVd) is a growing threat to hop cultivation globally. HSVd spreads mainly by use of contaminated planting material and by mechanical means. Thorough testing of hop yards and removal of infected bines are critical components of efforts to control the spread of the disease. Reverse transcription-polymerase chain reaction (RT-PCR) has become the primary technique used for HSVd detection; however, sample handling and analysis are technically challenging. In this study, a robust reverse transcription-recombinase polymerase amplification (RT-RPA) assay was developed to facilitate analysis of multiple samples...
April 7, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28378137/hip-external-rotation-strength-predicts-hop-performance-after-anterior-cruciate-ligament-reconstruction
#4
Paul W Kline, Jeremy Burnham, Michael Yonz, Darren Johnson, Mary Lloyd Ireland, Brian Noehren
PURPOSE: Quadriceps strength and single-leg hop performance are commonly evaluated prior to return to sport after anterior cruciate ligament reconstruction (ACLR). However, few studies have documented potential hip strength deficits after ACLR, or ascertained the relative contribution of quadriceps and hip strength to hop performance. METHODS: Patients cleared for return to sports drills after ACLR were compared to a control group. Participants' peak isometric knee extension, hip abduction, hip extension, and hip external rotation (HER) strength were measured...
April 4, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28376671/fundamental-motor-skill-proficiency-of-6-to-9-year-old-singaporean-children
#5
Swarup Mukherjee, Jamie Lye Ching Ting, Hin Fong Leong
Fundamental movement proficiency (FMS) is most successfully acquired during early school years. This cross-sectional study assessed FMS proficiency in Singaporean children at the start of and following 2.5 years of primary school physical education (PE). Participants were 244 children from Primary 1 and 3 levels. Fundamental movement skills (FMS) were assessed with the Test of Gross Motor Development-Second Edition (TGMD-2) that includes locomotor (LOCO) and object control (OC) subtests. Most children were rated "average" and "below average" for LOCO skills but "poor" and "below average" for OC skills without significant gender differences on either subtest or overall FMS proficiency and without FMS mastery...
January 1, 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28361285/evaluation-of-lower-limb-kinetics-during-gait-sprint-and-hop-tests-before-and-after-anterior-cruciate-ligament-reconstruction
#6
Joaquín Moya-Angeler, Javier Vaquero, Francisco Forriol
BACKGROUND: The purpose of this study was to evaluate the functional status prior to and at different times after anterior cruciate ligament reconstruction (ACLR), and to analyze the changes in the kinetic patterns of the involved and uninvolved lower limb during gait, sprint and three hop tests. MATERIALS AND METHODS: Seventy-four male patients with an ACL injury were included in the study. All patients performed a standardized kinetic protocol including gait, sprint and three hop tests (single-leg hop, drop vertical jump and vertical jump tests), preoperatively and at 3, 6, and 12 months after ACLR with a semitendinosus gracilis tendon autograft...
March 30, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28355978/limb-symmetry-indexes-can-overestimate-knee-function-after-anterior-cruciate-ligament-injury
#7
Elizabeth Wellsandt, Mathew J Failla, Lynn Snyder-Mackler
Study Design Prospective cohort. Background The high risk of second anterior cruciate ligament (ACL) injuries after return-to-sport highlights the importance of return-to-sport decision-making. Objective return-to-sport criteria frequently use limb symmetry indexes (LSI's) to quantify quadriceps strength and hop scores. Whether using the uninvolved limb in LSI's is optimal is unknown. Objectives To evaluate the uninvolved limb as a reference standard for LSI's utilized in return-to-sport testing and its relationship with second ACL injury rates...
March 29, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28344901/can-video-playback-provide-social-information-for-foraging-blue-tits
#8
Liisa Hämäläinen, Hannah M Rowland, Johanna Mappes, Rose Thorogood
Video playback is becoming a common method for manipulating social stimuli in experiments. Parid tits are one of the most commonly studied groups of wild birds. However, it is not yet clear if tits respond to video playback or how their behavioural responses should be measured. Behaviours may also differ depending on what they observe demonstrators encountering. Here we present blue tits (Cyanistes caeruleus) videos of demonstrators discovering palatable or aversive prey (injected with bitter-tasting Bitrex) from coloured feeding cups...
2017: PeerJ
https://www.readbyqxmd.com/read/28344461/within-session-sequence-of-balance-and-plyometric-exercises-does-not-affect-training-adaptations-with-youth-soccer-athletes
#9
Mehdi Chaouachi, Urs Granacher, Issam Makhlouf, Raouf Hammami, David G Behm, Anis Chaouachi
The integration of balance and plyometric training has been shown to provide significant improvements in sprint, jump, agility, and other performance measures in young athletes. It is not known if a specific within session balance and plyometric exercise sequence provides more effective training adaptations. The objective of the present study was to investigate the effects of using a sequence of alternating pairs of exercises versus a block (series) of all balance exercises followed by a block of plyometric exercises on components of physical fitness such as muscle strength, power, speed, agility, and balance...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28330519/insecticidal-effects-of-extracts-of-humulus-lupulus-hops-l-cones-and-its-principal-component-xanthohumol
#10
T Aydin, N Bayrak, E Baran, A Cakir
Insecticidal effects of the dichloromethane, ethyl acetate, acetone, ethanol and methanol extracts of Humulus lupulus (hops) L. cones and its principal components, xanthohumol was investigated on five stored pests, Sitophilus granarius (L.), Sitophilus oryzae (L.), Acanthoscelides obtectus (Say.), Tribolium castaneum (Herbst) and Lasioderma serricorne (F.). The mortality of adults of the insects treated with 2, 5, 5, 10 and 20 mg ml̠-1 concentrations of the extracts and xanthuhumol was counted after 24, 48, 72, 96 and 120 h...
March 23, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28330346/a-new-approach-to-molecular-dynamics-with-non-adiabatic-and-spin-orbit-effects-with-applications-to-qm-mm-simulations-of-thiophene-and-selenophene
#11
Marek Pederzoli, Jiří Pittner
We present surface hopping dynamics on potential energy surfaces resulting from the spin-orbit splitting, i.e., surfaces corresponding to the eigenstates of the total electronic Hamiltonian including the spin-orbit coupling. In this approach, difficulties arise because of random phases of degenerate eigenvectors and possibility of crossings of the resulting mixed states. Our implementation solves these problems and allows propagation of the coefficients both in the representation of the spin free Hamiltonian and directly in the "diagonal representation" of the mixed states...
March 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28321428/high-grade-partial-and-retracted-2-cm-proximal-hamstring-ruptures-nonsurgical-treatment-revisited
#12
Jonathan R Piposar, Amrit V Vinod, Joshua R Olsen, Edward Lacerte, Suzanne L Miller
BACKGROUND: High-grade partial proximal hamstring tears and complete tears with retraction less than 2 cm are a subset of proximal hamstring injuries where, historically, treatment has been nonoperative. It is unknown how nonoperative treatment compares with operative treatment. HYPOTHESIS: The clinical and functional outcomes of nonoperative and operative treatment of partial/complete proximal hamstring tears were compared. We hypothesize that operative treatment of these tears leads to better clinical and functional results...
February 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28318604/comparison-of-whole-body-vertical-stiffness-and-leg-stiffness-during-single-leg-hopping-in-place-in-children-and-adults
#13
Matthew Beerse, Jianhua Wu
In the hopping literature, whole-body vertical stiffness and leg stiffness are used interchangeably, due to most of the movement occurring in the vertical direction. However, there is some anterior/posterior movement of the center of mass and displacements of the foot during hopping in place in both children and adults. Further it is not understood if leg stiffness show a similar pattern as whole-body vertical stiffness when increasing hopping frequency. The purpose of this study was to test if whole-body vertical stiffness and leg stiffness are different during single-leg hopping in-place in children and adults, across a range of frequencies...
March 9, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28301433/a-comparison-of-bilateral-muscular-imbalance-ratio-calculations-using-functional-tests
#14
Theodoros M Bampouras, Susan Dewhurst
Bilateral muscular imbalance can increase the risk of injury and negatively impact sporting performance. Bilateral muscular imbalances are typically calculated as ((side 1-side 2)/reference value) x 100, to provide a percentage value of the difference between limbs. Using different numerator (right-left or strong-weak) or reference values (left, right, strong, weak, average of the two) could mask or inflate the true difference value. The present study aimed to compare the bilateral muscular imbalance ratio calculations, using the absolute difference between limbs as the numerator and the five different options as reference values...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28300606/one-step-multiplex-rt-qpcr-detects-three-citrus-viroids-from-different-genera-in-a-wide-range-of-hosts
#15
Fatima Osman, Tyler Dang, Sohrab Bodaghi, Georgios Vidalakis
A one-step multiplex reverse transcription real-time quantitative polymerase chain reaction (RT-qPCR) based on species-specific minor groove binding (MGB) probes, was developed for the simultaneous detection, identification, and quantification of three citrus viroids belonging to different genera. Citrus exocortis viroid (Pospiviroid), Hop stunt viroid (Hostuviroid), and Citrus bark cracking viroid (Cocadviroid) cause a variety of maladies in agriculturally significant crops. Therefore, reliable assays for their detection are essential tools for various government and industry organizations implementing disease management programs...
March 12, 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/28298066/effect-of-fatigue-protocols-on-lower-limb-neuromuscular-function-and-implications-for-anterior-cruciate-ligament-injury-prevention-training
#16
Sue D Barber-Westin, Frank R Noyes
BACKGROUND: Approximately two-thirds of anterior cruciate ligament (ACL) tears are sustained during noncontact situations when an athlete is cutting, pivoting, decelerating, or landing from a jump. Some investigators have postulated that fatigue may result in deleterious alterations in lower limb biomechanics during these activities that could increase the risk of noncontact ACL injuries. However, prior studies have noted a wide variation in fatigue protocols, athletic tasks studied, and effects of fatigue on lower limb kinetics and kinematics...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28291516/a-practical-solution-to-reduce-soft-tissue-artifact-error-at-the-knee-using-adaptive-kinematic-constraints
#17
Brigitte M Potvin, Mohammad S Shourijeh, Kenneth B Smale, Daniel L Benoit
Musculoskeletal modeling and simulations have vast potential in clinical and research fields, but face various challenges in representing the complexities of the human body. Soft tissue artifact from skin-mounted markers may lead to non-physiological representation of joint motions being used as inputs to models in simulations. To address this, we have developed adaptive joint constraints on five of the six degree of freedom of the knee joint based on in vivo tibiofemoral joint motions recorded during walking, hopping and cutting motions from subjects instrumented with intra-cortical pins inserted into their tibia and femur...
February 21, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28282899/testing-a-firefly-inspired-synchronization-algorithm-in-a-complex-wireless-sensor-network
#18
Chuangbo Hao, Ping Song, Cheng Yang, Xiongjun Liu
Data acquisition is the foundation of soft sensor and data fusion. Distributed data acquisition and its synchronization are the important technologies to ensure the accuracy of soft sensors. As a research topic in bionic science, the firefly-inspired algorithm has attracted widespread attention as a new synchronization method. Aiming at reducing the design difficulty of firefly-inspired synchronization algorithms for Wireless Sensor Networks (WSNs) with complex topologies, this paper presents a firefly-inspired synchronization algorithm based on a multiscale discrete phase model that can optimize the performance tradeoff between the network scalability and synchronization capability in a complex wireless sensor network...
March 8, 2017: Sensors
https://www.readbyqxmd.com/read/28282794/kinesio-taping-does-not-alter-muscle-torque-muscle-activity-or-jumping-performance-in-professional-soccer-players-a-randomized-placebo-controlled-blind-clinical-trial
#19
Igor Phillip Dos Santos Glória, Tabajara de Oliveira Gonzalez, Tabajara de Oliveira Gonzalez, Ernesto Cesar Pinto Leal Junior, Cid André Fidelis de Paula Gomes, Carolina Marciela Herpich, Fernanda Colella Antonialli, Felipe Serenza, Lucas de Souza Calheira, Eric Edmur Camargo Arruda, Paulo Roberto Garcia Lucareli, Daniela Aparecida Biasotto-Gonzalez
INTRODUCTION: Kinesio taping consists of the attachment of a thin elastic tape over specific muscles, the thickness of which is similar to that of the epidermis. OBJECTIVE: The aim of the present study was to compare the effect of Kinesio taping and placebo taping on muscle torque, muscle activity and jumping performance soccer players. METHODS: Thirty athletes were randomly allocated to two groups (Group A: Kinesio taping and Group B: placebo taping)...
March 3, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28280907/high-prevalence-of-knee-osteoarthritis-at-a-minimum-10-year-follow-up-after-knee-dislocation-surgery
#20
Gilbert Moatshe, Grant J Dornan, Tom Ludvigsen, Sverre Løken, Robert F LaPrade, Lars Engebretsen
PURPOSE: Long-term outcomes and the prevalence of osteoarthritis after surgical treatment of knee dislocations are lacking in the literature. The purpose of this study was to investigate the prevalence of knee osteoarthritis and knee function at a minimum of 10 years after knee dislocation surgery. METHODS: Sixty-five patients surgically treated for knee dislocations at a single level I trauma center between May 1996 and December 2004 were evaluated at a minimum of 10 years...
March 9, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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