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https://www.readbyqxmd.com/read/29768121/a-biomechanical-comparison-of-initial-sprint-acceleration-performance-and-technique-in-an-elite-athlete-with-cerebral-palsy-and-able-bodied-sprinters
#1
Ian N Bezodis, James Cowburn, Adam Brazil, Rhian Richardson, Cassie Wilson, Timothy A Exell, Gareth Irwin
Cerebral palsy is known to generally limit range of motion and force producing capability during movement. It also limits sprint performance, but the exact mechanisms underpinning this are not well known. One elite male T36 multiple-Paralympic sprint medallist (T36) and 16 well-trained able-bodied (AB) sprinters each performed 5-6 maximal sprints from starting blocks. Whole-body kinematics (250 Hz) in the block phase and first two steps, and synchronised external forces (1,000 Hz) in the first stance phase after block exit were combined to quantify lower limb joint kinetics...
May 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29768088/foot-and-ankle-joint-movements-of-dancers-and-non-dancers-a-comparative-study
#2
Ho-Jung Cho, Soyeon Kim, Joon-Yong Jung, Dai-Soon Kwak
Ballerinas use their ankle joints more extremely and sustain injuries on the ankle joint more frequently than non-dancers. Therefore, the ankle movement of dancers is important and should be studied to prevent injuries. Measuring ankle joint range of motion (ROM) using radiographs could demonstrate the contribution to motion of each joint. The aim of this study was to analyse and compare ankle joint movements and the ratio of each joint's contribution during movement between dancers and non-dancers, using radiographic images...
May 16, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29765182/influence-of-ankle-dorsiflexion-range-of-motion-on-heel-rise-time-during-gait
#3
Min-Hyeok Kang
[Purpose] The purpose of this study was to examine the correlation between weight-bearing (WB) and non-WB ankle dorsiflexion (DF) range of motion (ROM) and ankle movement during gait, including heel-rise time and ankle DF at heel-rise. [Subjects and Methods] Thirty healthy male subjects were recruited for this study. Ankle DF ROM of both feet was measured under the WB and non-WB conditions. Heel-rise time and ankle DF at heel-rise in both feet during gait were measured using a motion analysis system. Pearson product moment correlations were used to identify correlation ankle DF ROM and ankle movement during gait...
May 2018: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29763812/computation-of-hip-rotation-kinematics-retrospectively-using-functional-knee-calibration-during-gait
#4
Morgan Sangeux
BACKGROUND: Hip rotation kinematics during gait is a key parameter to support clinical decision making, for example in children with lower limb torsional deformities. However, hip rotation kinematics is also one of the least repeatable parameter because it is difficult to locate the position of the medio-lateral axis of the femur. Functional knee calibration provides an alternative to locate the medio-lateral axis of the femur and may be performed retrospectively, using the movement of the knee joint during gait...
May 8, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29703194/relationship-between-movement-time-and-hip-moment-impulse-in-the-sagittal-plane-during-sit-to-stand-movement-a-combined-experimental-and-computer-simulation-study
#5
Takuma Inai, Tomoya Takabayashi, Mutsuaki Edama, Masayoshi Kubo
BACKGROUND: The association between repetitive hip moment impulse and the progression of hip osteoarthritis is a recently recognized area of study. A sit-to-stand movement is essential for daily life and requires hip extension moment. Although a change in the sit-to-stand movement time may influence the hip moment impulse in the sagittal plane, this effect has not been examined. The purpose of this study was to clarify the relationship between sit-to-stand movement time and hip moment impulse in the sagittal plane...
April 27, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29701182/wearable-technology-reveals-gait-compensations-unstable-walking-patterns-and-fatigue-in-people-with-multiple-sclerosis
#6
Michael Psarakis, David Greene, Michael H Cole, Stephen R Lord, Phu Hoang, Matthew A D Brodie
People with Multiple Sclerosis (PwMS) often experience a decline in gait performance, which can compromise their independence and increase falls. Ankle joint contractures in PwMS are common and often result in compensatory gait patterns to accommodate reduced ankle range of motion (ROM). Using advances in wearable technology, the aim of this study was to quantify head and pelvis movement patterns that occur in PwMS with disability and determine how these secondary gait compensations impact on gait stability...
April 27, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29698430/dynamic-cortical-participation-during-bilateral-cyclical-ankle-movements-effects-of-parkinson-s-disease
#7
Takashi Yoshida, Kei Masani, Karl Zabjek, Milos R Popovic, Robert Chen
Parkinson's disease (PD) is known to increase asymmetry and variability of bilateral movements. However, the mechanisms of such abnormalities are not fully understood. Here, we aimed to investigate whether kinematic abnormalities are related to cortical participation during bilateral, cyclical ankle movements, which required i) maintenance of a specific frequency and ii) bilateral coordination of the lower limbs in an anti-phasic manner. We analyzed electroencephalographic and electromyographic signals from nine men with PD and nine aged-matched healthy men while they sat and cyclically dorsi- and plantarflexed their feet...
2018: PloS One
https://www.readbyqxmd.com/read/29675978/measurement-of-large-strain-properties-in-calf-muscles-in-vivo-using-magnetic-resonance-elastography-and-spatial-modulation-of-magnetization
#8
Kristy Tan, Lauriane Jugé, Alice Hatt, Shaokoon Cheng, Lynne E Bilston
It is important to measure the large deformation properties of skeletal muscle in vivo in order to understand and model movement and the force-producing capabilities of muscle. As muscle properties are non-linear, an understanding of how the deformation state affects the measured shear moduli is also useful for clinical applications of magnetic resonance elastography (MRE) to muscle disorders. MRE has so far only been used to measure the linear viscoelastic (small strain) properties of muscles. This study aims to measure the shear moduli of human calf muscles under varying degrees of strain using MRE...
April 19, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29667844/lower-extremity-biomechanics-during-a-drop-vertical-jump-in-participants-with-or-without-chronic-ankle-instability
#9
C Collin Herb, Kaitlyn Grossman, Mark A Feger, Luke Donovan, Jay Hertel
CONTEXT:   Chronic ankle instability (CAI) is a condition characterized by range-of-motion, neuromuscular, and postural-control deficits and subjective disability, reinjury, and posttraumatic osteoarthritis. Differences have been reported in kinematics, kinetics, surface electromyography (EMG), and ground reaction forces during functional tasks performed by those with CAI. These measures are often collected independently, and the research on collecting measures simultaneously during a movement task is limited...
April 18, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29625190/sacroiliac-joint-dysfunction-patients-exhibit-altered-movement-strategies-when-performing-a-sit-to-stand-task
#10
Robyn A Capobianco, Daniel F Feeney, Jana R Jeffers, Erika Nelson-Wong, Joseph Morreale, Alena M Grabowski, Roger M Enoka
OF BACKGROUND DATA: The ability to rise from a chair is a basic functional task that is frequently compromised in individuals diagnosed with orthopedic disorders in the low back and hip. There is no published literature that describes how this task is altered by sacroiliac joint dysfunction (SIJD). PURPOSE: To compare lower extremity biomechanics and the onset of muscle activity when rising from a chair in individuals with SIJD and healthy persons. STUDY DESIGN: Six women with unilateral SIJD and six age-matched healthy controls performed a sit-to-stand task while we measured kinematics, kinetics, and muscle activity...
April 3, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29603434/differences-in-in-vivo-muscle-fascicle-and-tendinous-tissue-behaviour-between-the-ankle-plantarflexors-during-running
#11
Adrian K M Lai, Glen A Lichtwark, Anthony G Schache, Marcus G Pandy
The primary human ankle plantarflexors, soleus (SO), medial gastrocnemius (MG) and lateral gastrocnemius (LG), are typically regarded as synergists and play a critical role in running. However, due to differences in muscle-tendon architecture and joint articulation, the muscle fascicles and tendinous tissue of the plantarflexors may exhibit differences in their behaviour and interactions during running. We combined in-vivo dynamic ultrasound measurements with inverse dynamics analyses to identify and explain differences in muscle fascicle, muscle-tendon unit (MTU) and tendinous tissue (SEE) behaviour of the primary ankle plantarflexors across a range of steady-state running speeds...
March 30, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29602303/hop-distance-symmetry-does-not-indicate-normal-landing-biomechanics-in-adolescent-athletes-with-recent-anterior-cruciate-ligament-reconstruction
#12
Tishya A L Wren, Nicole M Mueske, Christopher H Brophy, J Lee Pace, Mia J Katzel, Bianca R Edison, Curtis D VandenBerg, Tracy L Zaslow
Study Design Retrospective cohort. Background Return to sport (RTS) protocols after anterior cruciate ligament reconstruction (ACLR) often include assessment of hop distance symmetry. However, it is unclear if movement deficits are present regardless of hop symmetry. Objectives To assess biomechanics and symmetry of adolescent athletes following ACLR during a single leg hop for distance. Methods Forty-six patients with ACLR (5-12 months post-surgery; 27 female; age 15.6, SD 1.7 years) were classified as asymmetric (operative limb hop distance <90% of non-operative limb; n=17) or symmetric (n=29)...
March 30, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29600673/-clinical-efficacy-analysis-of-transverse-tibial-bone-transport-combined-with-vacuum-drainage-for-the-treatment-of-diabetic-foot-ulcer
#13
Zhong-Wei Jia, Jian-Ping Yu, Yun-Xing Su, Xiu-Sheng Guo, Jin-Bin Yu, Zhi-Jun Yang, Jia-Wei Niu, Jie Wei
OBJECTIVE: To investigate clinical effect of transverse tibial bone transport micro vessels regeneration technology combined with vacuum drainage in treating diabetic foot ulcer. METHODS: From November 2015 and December 2016, clinical data of 19 diabetic foot ulcer patients treated with transverse tibial bone transport micro vessels regeneration technology combined with vacuum drainage were retrospective analyzed, including 15 males and 4 females aged from 42 to 82 years old with an average of (64...
March 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29565045/types-of-falls-and-strategies-for-maintaining-stability-on-an-unstable-surface
#14
Michalina Błażkiewicz, Ida Wiszomirska, Katarzyna Kaczmarczyk, Andrzej Wit
BACKGROUND: Falls constitute an important health issue. They cause significant morbidity, mortality and have marked psychological effects on the individual, too. The aim of this study has been to determine parameters describing human movement strategies for balance and the reaction if balance is lost as a result of an unstable ground, and to attempt to describe the types of falls. MATERIAL AND METHODS: The study group comprised 20 volunteers. Kinematic parameters of falling and dynamic stability were measured using the Vicon Motion System and the Biodex Balance System SD...
March 15, 2018: Medycyna Pracy
https://www.readbyqxmd.com/read/29556489/training-effects-of-the-fifa-11-kids-on-physical-performance-in-youth-football-players-a-randomized-control-trial
#15
Carlos Pomares-Noguera, Francisco Ayala, Francisco Javier Robles-Palazón, Juan F Alomoto-Burneo, Alejandro López-Valenciano, José L L Elvira, Sergio Hernández-Sánchez, Mark De Ste Croix
Objective: To analyze the training effects of the FIFA 11+ kids on several parameters of physical performance in male youth football players. Materials and methods: Twenty-three youth players were randomized within each team into two groups (control vs. intervention). The intervention group performed the FIFA 11+ kids programme 2 times a week for 4 weeks; the control groups completed their normal warm-up routines. Thirteen physical performance measures {range of motion (hip, knee, and ankle joints), dynamic postural control (measured throughout the Y balance test), 20 m sprint time, slalom dribble with a ball, agility, vertical jumping height [counter movement jump (CMJ) and drop jump (DJ)], horizontal jump distance, accuracy when volleying a ball [measured throughout the Wall Volley test]} were assessed...
2018: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29550754/clinical-and-biomechanical-outcomes-of-rehabilitation-targeting-intersegmental-control-in-athletic-groin-pain-prospective-cohort-of-205-patients
#16
Enda King, Andrew Franklyn-Miller, Chris Richter, Eamon O'Reilly, Mark Doolan, Kieran Moran, Siobhan Strike, Éanna Falvey
BACKGROUND: Clinical assessments and rehabilitation in athletic groin pain (AGP) have focused on specific anatomical structures and uniplanar impairments rather than whole body movement. OBJECTIVE: To examine the effectiveness of rehabilitation that targeted intersegmental control in patients with AGP and to investigate post rehabilitation changes in cutting biomechanics. METHODS: Two hundred and five patients with AGP were rehabilitated focusing on clinical assessment of intersegmental control, linear running and change of direction mechanics in this prospective case series...
March 17, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29525640/the-association-of-visually-assessed-quality-of-movement-during-jump-landing-with-ankle-dorsiflexion-range-of-motion-and-hip-abductor-muscle-strength-among-healthy-female-athletes
#17
Alon Rabin, Ofira Einstein, Zvi Kozol
OBJECTIVE: To explore the association between ankle dorsiflexion (DF) range of motion (ROM), and hip abductor muscle strength, to visually-assessed quality of movement during jump-landing. DESIGN: Cross-sectional. SETTING: Gymnasium of participating teams. PARTICIPANTS: 37 female volleyball players. MAIN OUTCOME MEASURES: Quality of movement in the frontal-plane, sagittal-plane, and overall (both planes) was visually rated as "good/moderate" or "poor"...
May 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29516636/spatially-dynamic-recurrent-information-flow-across-long-range-dorsal-motor-network-encodes-selective-motor-goals
#18
Peter E Yoo, Maureen A Hagan, Sam E John, Nicholas L Opie, Roger J Ordidge, Terence J O'Brien, Thomas J Oxley, Bradford A Moffat, Yan T Wong
Performing voluntary movements involves many regions of the brain, but it is unknown how they work together to plan and execute specific movements. We recorded high-resolution ultra-high-field blood-oxygen-level-dependent signal during a cued ankle-dorsiflexion task. The spatiotemporal dynamics and the patterns of task-relevant information flow across the dorsal motor network were investigated. We show that task-relevant information appears and decays earlier in the higher order areas of the dorsal motor network then in the primary motor cortex...
June 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29510787/kinematic-and-kinetic-analysis-of-repeated-and-static-elev%C3%A3-in-adolescent-female-dance-students
#19
Amit Abraham, Ayelet Dunsky, Madeleine E Hackney, Ruth Dickstein
Elevé is a fundamental dance movement practiced routinely by dance students and serving as an integral component of screening in dance. It consists of ankle plantar flexion (PF) movement and is considered to be a frequent cause of foot and ankle injuries among dancers, with adolescent female dance students being at greatest risk for such injuries. Therefore, gaining additional knowledge regarding elevé functional range of motion (ROM) and inter-leg weightbearing distribution (WBD) properties among adolescent dance students is warranted for pedagogic, screening, injury prevention, and rehabilitation purposes...
March 15, 2018: Journal of Dance Medicine & Science
https://www.readbyqxmd.com/read/29475152/relationship-between-rearfoot-tibia-and-femur-kinematics-in-runners-with-and-without-patellofemoral-pain
#20
Bruna Calazans Luz, Ana Flávia Dos Santos, Mariana Carvalho de Souza, Tatiana de Oliveira Sato, Deborah A Nawoczenski, Fábio Viadanna Serrão
BACKGROUND: Patellofemoral pain (PFP) is the most common running overuse injury. Excessive rearfoot eversion is commonly considered as a PFP risk factor and the relationship between ankle-foot complex movement and lower limb may be involved with this dysfunction. The purpose of this study was to evaluate the correlation between rearfoot eversion with tibia and femur kinematics in frontal and transverse planes during running in individuals with and without PFP. The secondary purpose was to compare the lower limb kinematics between runners with and without PFP...
March 2018: Gait & Posture
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