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https://www.readbyqxmd.com/read/28750263/biomechanical-differences-between-cases-with-chronic-exertional-compartment-syndrome-and-asymptomatic-controls-during-walking-and-marching-gait
#1
Andrew Roberts, David Roscoe, David Hulse, Alexander N Bennett, Sharon Dixon
Chronic exertional compartment syndrome is a significant problem in military populations that may be caused by specific military activities. This study aimed to investigate the kinematic and kinetic differences in military cases with chronic exertional compartment syndrome and asymptomatic controls. 20 males with symptoms of chronic exertional compartment syndrome of the anterior compartment and 20 asymptomatic controls were studied. Three-dimensional lower limb kinematics and kinetics were compared during walking and marching...
July 18, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28749699/patellofemoral-joint-loads-during-running-at-the-time-of-return-to-sport-in-elite-athletes-with-acl-reconstruction
#2
Lee Herrington, Saud Alarifi, Richard Jones
BACKGROUND: Patellofemoral joint pain and degeneration are common in patients who undergo anterior cruciate ligament reconstruction (ACLR). The presence of patellofemoral joint pain significantly affects the patient's ability to continue sport participation and may even affect participation in activities of daily living. The mechanisms behind patellofemoral joint pain and degeneration are unclear, but previous research has identified altered patellofemoral joint loading in individuals with patellofemoral joint pain when running...
July 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28740745/investigating-the-running-abilities-of-tyrannosaurus-rex-using-stress-constrained-multibody-dynamic-analysis
#3
William I Sellers, Stuart B Pond, Charlotte A Brassey, Philip L Manning, Karl T Bates
The running ability of Tyrannosaurus rex has been intensively studied due to its relevance to interpretations of feeding behaviour and the biomechanics of scaling in giant predatory dinosaurs. Different studies using differing methodologies have produced a very wide range of top speed estimates and there is therefore a need to develop techniques that can improve these predictions. Here we present a new approach that combines two separate biomechanical techniques (multibody dynamic analysis and skeletal stress analysis) to demonstrate that true running gaits would probably lead to unacceptably high skeletal loads in T...
2017: PeerJ
https://www.readbyqxmd.com/read/28728130/superficial-plantar-cutaneous-sensation-does-not-trigger-barefoot-running-adaptations
#4
M A Thompson, K M Hoffman
It has long been proposed that the gait alterations associated with barefoot running are mediated by alterations in sensory feedback, yet there has been no data to support this claim. Thus, the purpose of this study was to examine the role of superficial plantar cutaneous feedback in barefoot and shod running. METHODS: 10 healthy active subjects (6 male, 4 female); mass: 65.2+9.7kg; age: 27+7.1years participated in this study. 10 over-ground running trials were completed in each of the following conditions: barefoot (BF), shod (SHOD), anesthetized barefoot (ANEST BF) and anesthetized shod (ANEST SHOD)...
June 27, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28724627/using-step-width-to-compare-locomotor-biomechanics-between-extinct-non-avian-theropod-dinosaurs-and-modern-obligate-bipeds
#5
P J Bishop, C J Clemente, R E Weems, D F Graham, L P Lamas, J R Hutchinson, J Rubenson, R S Wilson, S A Hocknull, R S Barrett, D G Lloyd
How extinct, non-avian theropod dinosaurs locomoted is a subject of considerable interest, as is the manner in which it evolved on the line leading to birds. Fossil footprints provide the most direct evidence for answering these questions. In this study, step width-the mediolateral (transverse) distance between successive footfalls-was investigated with respect to speed (stride length) in non-avian theropod trackways of Late Triassic age. Comparable kinematic data were also collected for humans and 11 species of ground-dwelling birds...
July 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28712024/knee-hyperextension-does-not-adversely-affect-dynamic-in-vivo-kinematics-after-anterior-cruciate-ligament-reconstruction
#6
Kanto Nagai, Tom Gale, Elmar Herbst, Yasutaka Tashiro, James J Irrgang, Scott Tashman, Freddie H Fu, William Anderst
PURPOSE: To evaluate the effect of knee hyperextension on dynamic in vivo kinematics after anterior cruciate ligament reconstruction (ACL-R). METHODS: Forty-two patients underwent unilateral ACL-R. Twenty-four months after surgery, subjects performed level walking and downhill running on a treadmill while dynamic stereo radiographs were acquired at 100 (walking) and 150 Hz (running). Tibiofemoral motion was determined using a validated model-based tracking process, and tibiofemoral translations/rotations were calculated...
July 15, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28711423/randomized-trial-of-intelligent-sensor-system-for-early-illness-alerts-in-senior-housing
#7
Marilyn Rantz, Lorraine J Phillips, Colleen Galambos, Kari Lane, Gregory L Alexander, Laurel Despins, Richelle J Koopman, Marjorie Skubic, Lanis Hicks, Steven Miller, Andy Craver, Bradford H Harris, Chelsea B Deroche
OBJECTIVES: Measure the clinical effectiveness and cost effectiveness of using sensor data from an environmentally embedded sensor system for early illness recognition. This sensor system has demonstrated in pilot studies to detect changes in function and in chronic diseases or acute illnesses on average 10 days to 2 weeks before usual assessment methods or self-reports of illness. DESIGN: Prospective intervention study in 13 assisted living (AL) communities of 171 residents randomly assigned to intervention (n=86) or comparison group (n=85) receiving usual care...
July 12, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28702442/kinematics-and-neuromuscular-recruitment-during-vertical-treadmill-exercise
#8
Alastair R Jordan, Andrew Barnes, David Claxton, Alison Purvis, Mary Fysh
The vertical treadmill (VertiRun) is an unresearched, partial weight-bearing exercise mode for lower limb rehabilitation. The user undertakes a "running-like" action whilst body weight is supported by a bench and the limb is drawn downwards against overhanging resistance cables on a vertically hung nonmotorised treadmill. This study sought to describe the kinematics and neuromuscular recruitment during VertiRun exercise in the supine, 40°, and 70° postures. Twenty-one healthy male participants (age, 25±7 years; stature, 1...
June 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28696012/inhibition-of-snk-spar-signaling-pathway-promotes-the-restoration-of-motor-function-in-a-rat-model-of-ischemic-stroke
#9
Qing-Yu Fan, Jing-Jie Liu, Gui-Lian Zhang, Hai-Qin Wu, Ru Zhang, Shu-Qin Zhan, Na Liu
This study aimed to investigate the effects of SPAR signaling pathway on the restoration of motor function in ischemic stroke (IS). Sprague-Dawley male rats were separated into the control and sham groups, as well as the group for middle cerebral artery occlusion (MCAO) model establishment. Successfully established rat ischemic models were randomly divided into model, SNK(MCAO-del) and pcDNA3.1-SNK groups. The evaluation of motor function among the rats in each group was assessed using a balance beam, a screen test and the Garcia scoring method...
July 11, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28693378/effects-of-load-carriage-and-work-boots-on-lower-limb-kinematics-of-industrial-workers
#10
Miao Tian, Huiju Park, Jun Li, Heekwang Koo, Qinwen Xu
Load and footwear condition are two crucial elements varying the kinematic responses during walking, which probably lead to chronic injury. Fifteen healthy male individual with no obvious gait abnormalities participated in this study. Apart from a no-load condition, four external load conditions with two load levels were investigated. Work boots were compared with running shoes to determine footwear effects. Significant impacts were found for lower limb range of motion at certain joints when carrying loads...
July 11, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28683418/tibial-impact-accelerations-in-gait-of-primary-school-children-the-effect-of-age-and-speed
#11
Oren Tirosh, Guy Orland, Alon Eliakim, Dan Nemet, Nili Steinberg
Tibial stress fractures are associated with increased lower extremity loading at initial foot-ground contact, reflected in high peak positive acceleration (>8g) of the tibia in adults. There is no reported data on peak positive acceleration of the tibia in children during walking and running. The aim of this study was to establish tibial peak positive acceleration responses in children across a range of age and gait speeds. Twenty-four children aged 8.5±1.4years with no known gait pathology comprised two age groups; Young (7-9year, n=12) and Older (10-12 years, n=12)...
June 27, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28683231/sound-intensity-feedback-during-running-reduces-loading-rates-and-impact-peak
#12
Jeremiah J Tate, Clare E Milner
Study Design Controlled laboratory study, within session design. Background Gait retraining has been proposed as an effective intervention to reduce impact loading in runners at risk of stress fractures. Interventions that can be easily implemented in the clinic are needed. Objective To assess the immediate effects of sound intensity feedback related to impact during running on vertical impact peak (VIP), peak vertical instantaneous loading rate (VILR), and vertical average loading rate (VALR). Methods Fourteen healthy, college-aged runners who ran at least 9...
July 6, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28675371/proximal-femoral-derotation-osteotomy-for-idiopathic-excessive-femoral-anteversion-and-intoeing-gait
#13
Gohar Naqvi, Kuldeep Stohr, Andreas Rehm
AIM: The purpose of this study is to assess the symptoms caused by excessive femoral anteversion and the outcomes of femoral derotation osteotomy. METHODS: We reviewed data on patients who underwent proximal femoral derotation osteotomy for symptomatic intoeing gait caused by femoral anteversion. Only symptomatic patients were considered for corrective derotation osteotomy. Degree of femoral anteversion was confirmed on computed tomography (CT) scan. RESULTS: Thirty-five extremities were operated in 21 patients with an average age of 13...
2017: SICOT-J
https://www.readbyqxmd.com/read/28666810/video-based-assessment-of-foot-strike-pattern-and-step-rate-is-valid-and-reliable-in-runners-with-patellofemoral-pain
#14
Jean-Francois Esculier, Thomas Silvini, Laurent J Bouyer, Jean-Sébastien Roy
OBJECTIVES: To evaluate, during treadmill running in runners with patellofemoral pain (PFP), the concurrent validity of determining foot strike pattern using 2D video and the intra- and inter-rater reliability of foot strike pattern and step rate assessments between a novice and experienced observer. DESIGN: Methodological study (validity/reliability). SETTING: Motion analysis laboratory. PARTICIPANTS: Sixty runners with PFP (37 females, 23 males; age = 30...
November 23, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28654506/a-progressive-running-program-for-an-adolescent-with-cerebral-palsy
#15
Jessica Lewis
PURPOSE: To describe the physical therapy intervention and outcomes for a 20-week progressive running program. SUMMARY OF KEY POINTS: A 12-year-old boy with spastic diplegic cerebral palsy, Gross Motor Function Classification System level II, participated in a 20-week running program. The 6-minute walk test and the 88-item and 66-item versions of the Gross Motor Function Measure (GMFM) were administered at baseline and program completion. After completion of the program, the participant exceeded thresholds for minimally clinically important differences on the GMFM-66 total score and GMFM-88 Dimension D and E scores...
July 2017: Pediatric Physical Therapy
https://www.readbyqxmd.com/read/28633035/economy-and-endurance-in-human-evolution
#16
REVIEW
Herman Pontzer
The evolutionary pressures shaping humans' unique bipedal locomotion have been a focus of research since Darwin, but the origins of humans' economical walking gait and endurance running capabilities remain unclear. Here, I review the anatomical and physiological determinants of locomotor economy (e.g., limb length and posture) and endurance (e.g., muscle volume and fiber type) and investigate their development in the hominin fossil record. The earliest hominins were bipedal but retained ape-like features in the hind limb that would have limited their walking economy compared to living humans...
June 19, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28632055/muscle-activity-in-sprinting-a-review
#17
Róisín M Howard, Richard Conway, Andrew J Harrison
The use of electromyography (EMG) is widely recognised as a valuable tool for enhancing the understanding of performance drivers and potential injury risk in sprinting. The timings of muscle activations relative to running gait cycle phases and the technology used to obtain muscle activation data during sprinting are of particular interest to scientists and coaches. This review examined the main muscles being analysed by surface EMG (sEMG), their activations and timing, and the technologies used to gather sEMG during sprinting...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28605231/a-comparison-of-both-motorized-and-non-motorized-treadmill-gait-kinematics-to-overground-locomotion
#18
Adam M Fullenkamp, Danilo V Tolusso, C Matthew Laurent, Brian M Campbell, Andrea E Cripps
CONTEXT: Motorized treadmills (MT) present an altered motor task compared to overground (OG) locomotion in that MT belt surfaces are motor-driven, whereas individuals walking/running OG must propel themselves. A possible solution may lie with novel non-motorized treadmill (NMT) devices as the belt surface is propelled by the user. OBJECTIVE: The purpose of this study was to compare gait performance during both MT and NMT locomotion to OG. DESIGN: Crossover study...
June 12, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28601242/kinematic-models-of-lower-limb-joints-for-musculo-skeletal-modelling-and-optimization-in-gait-analysis
#19
REVIEW
Alberto Leardini, Claudio Belvedere, Fabrizio Nardini, Nicola Sancisi, Michele Conconi, Vincenzo Parenti-Castelli
Kinematic models of lower limb joints have several potential applications in musculoskeletal modelling of the locomotion apparatus, including the reproduction of the natural joint motion. These models have recently revealed their value also for in vivo motion analysis experiments, where the soft-tissue artefact is a critical known problem. This arises at the interface between the skin markers and the underlying bone, and can be reduced by defining multibody kinematic models of the lower limb and by running optimization processes aimed at obtaining estimates of position and orientation of relevant bones...
May 22, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28599003/measurement-agreement-between-a-newly-developed-sensing-insole-and-traditional-laboratory-based-method-for-footstrike-pattern-detection-in-runners
#20
Roy T H Cheung, Winko W An, Ivan P H Au, Janet H Zhang, Zoe Y S Chan, Alfred Man, Fannie O Y Lau, Melody K Y Lam, K K Lau, C Y Leung, N W Tsang, Louis K Y Sze, Gilbert W K Lam
This study introduced a novel but simple method to continuously measure footstrike patterns in runners using inexpensive force sensors. Two force sensing resistors were firmly affixed at the heel and second toe of both insoles to collect the time signal of foot contact. A total of 109 healthy young adults (42 males and 67 females) were recruited in this study. They ran on an instrumented treadmill at 0°, +10°, and -10° inclinations and attempted rearfoot, midfoot, and forefoot landings using real time visual biofeedback...
2017: PloS One
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