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https://www.readbyqxmd.com/read/27893475/leg-stiffness-in-female-soccer-players-inter-session-reliability-and-the-fatiguing-effects-of-soccer-specific-exercise
#1
Mark De Ste Croix, Jonathan Hughes, Rhodri S Lloyd, Jon L Oliver, Paul Read
Low levels of leg stiffness and reduced leg stiffness when fatigue is present compromise physical performance and increase injury risk. The purpose of this study was to (a) determine the reliability of leg stiffness measures obtained from contact mat data and (b) explore age-related differences in leg stiffness following exposure to a soccer-specific fatigue protocol in young female soccer players. 37 uninjured female youth soccer players divided into 3 sub-groups based on chronological age (U13, U15 and U17 year olds) volunteered to participate in the study...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27872901/reperfusion-and-compartment-syndrome-after-flexible-ureteroscopy-in-a-patient-with-an-iliac-vascular-graft
#2
Esteban Emiliani, Michele Talso, Edgar Beltrán-Suárez, Steeve Doizi, Olivier Traxer
Background: Flexible ureteroscopy (fURS) is one of the main treatment options for urolithiasis less than 2 cm. Although fURS has no relative contraindication, some anatomical factors may need to be considered, as not all patients are suitable for the regular lithotomy position (LP). We report the case of a patient with a right iliac vascular graft that after an fURS without intraoperative incidences developed a reperfusion syndrome of the right lower limb. Case Presentation: A 46-year-old male patient was referred for treatment and follow-up in the cystinuric clinic after being found to have a 3 cm pelvic stone with a Double-J catheter in place after two failed sessions of shockwave lithotripsy...
2016: Journal of Endourology Case Reports
https://www.readbyqxmd.com/read/27847857/complicated-congenital-dislocation-of-the-knee-a-case-report
#3
Firooz Madadi, Mohammad A Tahririan, Mohsen Karami, Firoozeh Madadi
Congenital dislocation of the knee (CDK) is a rare disorder. We report the case of a 7-year-old girl with bilateral knee stiffness, marked anterior bowing of both legs, and inability to walk without aid. Radiologic investigation revealed bilateral knee joint dislocation accompanied by severe anterior bowing of both tibia proximally and posterior bowing of both femur distally, demonstrating a complicated congenital knee dislocation. Two-staged open reduction with proximal tibial osteotomy was performed to align the reduced knee joints...
October 2016: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/27824567/shear-wave-measurements-for-evaluation-of-tendon-diseases
#4
Chia-Lun Yeh, Po-Ling Kuo, Jean-Luc Gennisson, Javier Brum, Mickael Tanter, Pai-Chi Li
This paper investigated the feasibility of using supersonic shear wave measurements to quantitatively differentiate normal and damaged tendons based on their mechanical properties. Five freshly harvested porcine tendons excised from pig legs were used. Tendon damage was induced by incubating the tendons with a 1% w/v collagenase solution. Values of shear modulus were derived both by a time-of-flight (TOF) approach and a transverse isotropic plate model (TI-model). The results show that as the preload applied to the tendon increased from 0 to 3 N, the mean shear modulus derived based on the TOF approach, the TI-model, and Young's modulus estimated from mechanical testing increased from 14...
November 2016: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/27818969/surgical-treatment-of-neglected-clubfoot-using-external-fixator
#5
Rodrigo Mota Pacheco Fernandes, Maurilio Darcy Dos Santos Mendes, Renato Amorim, Marcus Aurélio Preti, Marcelo Back Sternick, Guilherme Pelosini Gaiarsa
The definition of neglected clubfoot (NC) includes a variable range of complex deformities of the foot that are refractory to conventional treatments or are treated inappropriately. Several etiologies may be related to this. The Ilizarov method has become established as a tool for treating these deformities. It minimizes soft-tissue damage through gradual correction of the deformity, with a high success rate in relation to achieving a plantigrade foot, with low incidence of recurrence. The indications for treatment include severe rigid deformities (Dimeglio III and IV), or adverse skin conditions...
September 2016: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/27813047/effects-of-acute-aerobic-exercise-on-arterial-stiffness-before-and-after-glucose-ingestion
#6
R Kobayashi, S Yoshida, T Okamoto
The purpose of present study was to compare the acute effects of moderate-intensity aerobic exercise (65% peak oxygen uptake, 30 min) on arterial stiffness before and after glucose ingestion. 11 healthy young males completed 4 trials in random order. They started aerobic exercise at 90 min before (-90 min-EX), 60 min before (-60 min-EX), 30 min after (30 min-EX), and 60 min after (60 min-EX) the 75-g oral glucose tolerance test (OGTT). Aortic (carotid-femoral) and leg (femoral-ankle) pulse wave velocity (PWV), brachial and ankle blood pressure (BP), blood glucose (BG) and insulin levels were measured at 90 min (baseline) and 30 min before and at 30, 60 and 120 min after the 75-g OGTT...
November 3, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27792181/skeleton-based-abnormal-gait-detection
#7
Trong-Nguyen Nguyen, Huu-Hung Huynh, Jean Meunier
Human gait analysis plays an important role in musculoskeletal disorder diagnosis. Detecting anomalies in human walking, such as shuffling gait, stiff leg or unsteady gait, can be difficult if the prior knowledge of such a gait pattern is not available. We propose an approach for detecting abnormal human gait based on a normal gait model. Instead of employing the color image, silhouette, or spatio-temporal volume, our model is created based on human joint positions (skeleton) in time series. We decompose each sequence of normal gait images into gait cycles...
October 26, 2016: Sensors
https://www.readbyqxmd.com/read/27789034/soldier-relevant-body-borne-loads-increase-knee-joint-contact-force-during-a-run-to-stop-maneuver
#8
John W Ramsay, Clifford L Hancock, Meghan P O'Donovan, Tyler N Brown
The purpose of this study was to understand the effects of load carriage on human performance, specifically during a run-to-stop (RTS) task. Using OpenSim analysis tools, knee joint contact force, grounds reaction force, leg stiffness and lower extremity joint angles and moments were determined for nine male military personnel performing a RTS under three load configurations (light, ~6kg, medium, ~20kg, and heavy, ~40kg). Subject-based means for each biomechanical variable were submitted to repeated measures ANOVA to test the effects of load...
October 20, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27770784/effects-of-two-neuromuscular-training-programs-on-running-biomechanics-with-load-carriage-a-study-protocol-for-a-randomised-controlled-trial
#9
Bernard X W Liew, Susan Morris, Justin W L Keogh, Brendyn Appleby, Kevin Netto
BACKGROUND: In recent years, athletes have ventured into ultra-endurance and adventure racing events, which tests their ability to race, navigate, and survive. These events often require race participants to carry some form of load, to bear equipment for navigation and survival purposes. Previous studies have reported specific alterations in biomechanics when running with load which potentially influence running performance and injury risk. We hypothesize that a biomechanically informed neuromuscular training program would optimize running mechanics during load carriage to a greater extent than a generic strength training program...
October 22, 2016: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/27768506/changes-in-running-mechanics-during-a-six-hours-running-race
#10
Nicola Giovanelli, Paolo Taboga, Stefano Lazzer
PURPOSE: To investigate changes in running mechanics during a six hours running race. METHODS: Twelve ultra-runners (age: 41.9±5.8 years; body mass: 68.3±12.6 kg; stature: 1.72±0.09 m) were asked to run as many 874 m flat loops as possible in six hours. Running speed, contact (tc) and aerial (ta) times were measured in the first lap and every 30±2 minutes during the race. Peak vertical ground reaction force (Fmax), stride length (SL), vertical downward displacement of the centre of mass (Δz), leg length change (ΔL), vertical (kvert) and leg (kleg) stiffness were then estimated...
September 26, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27767015/a-water-walking-robot-mimicking-the-jumping-abilities-of-water-striders
#11
Kai Yang, Gangfeng Liu, Jihong Yan, Tao Wang, Xinbin Zhang, Jie Zhao
The highly efficient and agile water-surface locomotion of water striders has attracted substantial research attention. Compared with imitating the horizontal rowing motion, imitating the jumping capability of water striders is much more challenging because the strong interaction in the jumping process easily causes the robot to sink. This study focuses on designing a miniature robot capable of continuously jumping on the water surface. A spring-based actuating mechanism is proposed to produce a large jumping force...
October 21, 2016: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/27766131/eight-weeks-of-kettlebell-swing-training-does-not-improve-sprint-performance-in-recreationally-active-females
#12
Michael E Holmstrup, Brock T Jensen, William S Evans, Emily C Marshall
The kettlebell swing (KBS), emphasizing cyclical, explosive hip extension in the horizontal plane, aligns with movement- and velocity-specificity of sprinting. The present study examined the effect of an eight-week KBS intervention on sprinting in recreationally-active females, in comparison to an eight-week intervention using the stiff-legged deadlift (SDL). Following a pre-testing session measuring 30 meter sprint and countermovement vertical jump performance, participants were divided evenly by sprint time into KBS (n=8) and SDL (n=10) cohorts...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27758064/acute-effects-of-aerobic-exercise-intensity-on-arterial-stiffness-after-glucose-ingestion-in-young-men
#13
Ryota Kobayashi, Yuto Hashimoto, Hiroyuki Hatakeyama, Takanobu Okamoto
Arterial stiffness increases after glucose ingestion. Acute low- and moderate-intensity aerobic exercise decreases arterial stiffness. However, the acute effects of 30 min of cycling at low- and moderate-intensity [25% (LE trial) and 65% (ME trial) peak oxygen uptake, respectively] on arterial stiffness at 30, 60 and 120 min of a postexercise glucose ingestion. Ten healthy young men (age, 22·4 ± 0·5 years) performed LE and ME trials on separate days in a randomized controlled crossover fashion. Carotid-femoral (aortic) pulse wave velocity (PWV), femoral-ankle (leg) PWV, carotid augmentation index (AIx) and carotid blood pressure (BP) (applanation tonometry), brachial and ankle BP (oscillometric device), heart rate (HR) (electrocardiography), blood glucose (UV-hexokinase method) and blood insulin (CLEIA method) levels were measured at before (baseline) and at 30, 60 and 120 min after the 75-g OGTT...
October 18, 2016: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/27755335/fat%C3%A4-gue-fa%C3%A4-lure-in-extra-art%C3%A4-cular-prox%C3%A4-mal-t%C3%A4-b%C3%A4-a-fractures-lock%C3%A4-ng-%C3%A4-ntramedullary-na%C3%A4-l-vs-double-lock%C3%A4-ng-plates
#14
Utku Kandemir, Safa Herfat, Mary Herzog, Paul Viscogliosi, Murat Pekmezci
OBJECTIVES: The goal of this study is to compare the fatigue strength of a locking intramedullary nail (LN) construct to a double locking plate (DLP) construct in comminuted proximal extra-articular tibia fractures. METHODS: Eight pairs of fresh frozen cadaveric tibias with low bone mineral density (Age: 80 ± 7 (SD) years, T-score: -2.3 ± 1.2) were used. One tibia from each pair was fixed with LN while the contralateral side was fixed with DLP for complex extra-articular multifragmentary, metaphyseal fractures (simulating OTA41-A3...
October 7, 2016: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/27755333/biomechanical-evaluation-of-the-femoral-neck-system-in-unstable-pauwels-iii-femoral-neck-fractures-a-comparison-to-the-dynamic-hip-screw-and-cannulated-screws
#15
Karl Stoffel, Ivan Zderic, Florian Gras, Christoph Sommer, Ursula Eberli, David Mueller, Martin Oswald, Boyko Gueorguiev
OBJECTIVES: To evaluate the biomechanical performance of Femoral Neck System (FNS) in comparison to established methods for fixation of femoral neck fractures in a cadaveric model. METHODS: Twenty pairs of fresh-frozen human cadaveric femora were instrumented either with DHS-Screw, DHS-Blade, 3CS or with FNS in a partially paired design. The specimens were randomized to two paired treatment groups based on the BMD, namely DHS-Screw/DHS-Blade and FNS/3CS. A reduced unstable femoral neck fracture with postero-caudal comminution, AO/OTA 31-B2...
October 13, 2016: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/27754073/os-18-05-sarcopenia-is-independently-associated-with-arterial-stiffness-in-patients-with-type-2-diabetes
#16
Yuki Imaizumi, Kazuo Eguchi, Toshiki Kaihara, Kumiko Urano, Rieko Shinagawa, Minoru Araki, Koji Inoue, Koichiro Hokao, Yuka Tsujita, Takuya Furusawa, Ryuichiro Kaku, Kazuomi Kario
OBJECTIVE: We tested the hypothesis that sarcopenia, an age-related loss of skeletal muscle mass and function, is associated with arterial stiffness in patients with diabetes (DM). DESIGN AND METHOD: We studied 65 hypertensives in the Real BP study, an observational study of home BP telemonitoring system. As parameters of sarcopenia, we used locomotive syndrome scale, circumference of the wrist, lower leg, and thigh (10 cm above the patella), grip strength, and 6 minute-walk test...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27741123/robot-assisted-gait-training-improves-brachial-ankle-pulse-wave-velocity-and-peak-aerobic-capacity-in-subacute-stroke-patients-with-totally-dependent-ambulation-randomized-controlled-trial
#17
Eun Young Han, Sang Hee Im, Bo Ryun Kim, Min Ji Seo, Myeong Ok Kim
OBJECTIVE: Brachial-ankle pulse wave velocity (baPWV) evaluates arterial stiffness and also predicts early outcome in stroke patients. The objectives of this study were to investigate arterial stiffness of subacute nonfunctional ambulatory stroke patients and to compare the effects of robot-assisted gait therapy (RAGT) combined with rehabilitation therapy (RT) on arterial stiffness and functional recovery with those of RT alone. METHOD: The RAGT group (N = 30) received 30 minutes of robot-assisted gait therapy and 30 minutes of conventional RT, and the control group (N = 26) received 60 minutes of RT, 5 times a week for 4 weeks...
October 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27735229/reliability-of-leg-and-vertical-stiffness-during-high-speed-treadmill-running
#18
Panagiotis Pappas, Giorgos Dallas, Giorgos Paradisis
In research, the accurate and reliable measurement of leg and vertical stiffness could contribute to valid interpretations. The current study aimed at determining the intra-participant variability (i.e. intra-day and inter-day reliabilities) of leg and vertical stiffness, as well as related parameters, during high speed treadmill running, using the "sine-wave" method. Thirty-one males ran on a treadmill at 6.67 m∙s(-1), and the contact and flight times were measured. To determine the intra-day reliability three 10-s running bouts with 10-min recovery were performed...
October 13, 2016: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/27730595/three-dimensional-kinematic-and-kinetic-analysis-of-knee-rotational-stability-in-acl-deficient-patients-during-walking-running-and-pivoting
#19
Marie Bagger Bohn, Annemette Krintel Petersen, Dennis Brandborg Nielsen, Henrik Sørensen, Martin Lind
BACKGROUND: Anterior cruciate ligament (ACL) deficiency leads to altered stability of the knee. The purpose of this study was to compare the dynamic, rotational stability of the knee, expressed as rotational stiffness, between anterior cruciate ligament-deficient (ACLD) knees, their contralateral intact knees (ACLI) and a knee healthy control group during walking, running and 90° pivoting. We hypothesized a larger tibial internal rotation, a smaller knee joint external moment and a lower rotational stiffness in the ACLD group compared to the ACLI and the control group...
December 2016: Journal of Experimental Orthopaedics
https://www.readbyqxmd.com/read/27717320/the-relevance-of-nerve-mobility-on-function-and-activity-in-children-with-cerebral-palsy
#20
Petra Marsico, Amir Tal-Akabi, Hubertus J A van Hedel
BACKGROUND: In children with cerebral palsy (CP), stiffness, caused by contractile and non-contractile structures, can influence motor performance. This study sought to determine whether the nerve mobility had a relevant impact on motor performance in children with CP. We hypothesized that a positive Straight Leg Raise (SLR) test, as well as smaller SLR hip angle, would relate to lower leg muscle strength, reduced motor capacity and less motor performance in children with CP. METHODS: We applied a cross-sectional analysis on data including SLR, leg muscle strength, Gross Motor Function Measure (GMFM-66) and number of activity counts during daily life from thirty children with CP (6-18 years)...
October 7, 2016: BMC Neurology
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