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https://www.readbyqxmd.com/read/28423061/muscle-contributions-to-medial-tibiofemoral-compartment-contact-loading-following-acl-reconstruction-using-semitendinosus-and-gracilis-tendon-grafts
#1
Jason M Konrath, David J Saxby, Bryce A Killen, Claudio Pizzolato, Christopher J Vertullo, Rod S Barrett, David G Lloyd
BACKGROUND: The muscle-tendon properties of the semitendinosus (ST) and gracilis (GR) are substantially altered following tendon harvest for the purpose of anterior cruciate ligament reconstruction (ACLR). This study adopted a musculoskeletal modelling approach to determine how the changes to the ST and GR muscle-tendon properties alter their contribution to medial compartment contact loading within the tibiofemoral joint in post ACLR patients, and the extent to which other muscles compensate under the same external loading conditions during walking, running and sidestep cutting...
2017: PloS One
https://www.readbyqxmd.com/read/28405377/modulation-of-leg-joint-function-to-produce-emulated-acceleration-during-walking-and-running-in-humans
#2
Dominic James Farris, Brent J Raiteri
Understanding how humans adapt gait mechanics for a wide variety of locomotor tasks is important for inspiring the design of robotic, prosthetic and wearable assistive devices. We aimed to elicit the mechanical adjustments made to leg joint functions that are required to generate accelerative walking and running, using metrics with direct relevance to device design. Twelve healthy male participants completed constant speed (CS) walking and running and emulated acceleration (ACC) trials on an instrumented treadmill...
March 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28404555/simi-move-entry-level-mobile-app-to-analyse-walking-and-running-gait
#3
Boon Kiak Yeo, Dinesh Sirisena
No abstract text is available yet for this article.
April 12, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28402758/the-graft-bending-angle-can-affect-early-graft-healing-after-anterior-cruciate-ligament-reconstruction-in-vivo-analysis-with-2-years-follow-up
#4
Yasutaka Tashiro, Tom Gale, Vani Sundaram, Kanto Nagai, James J Irrgang, William Anderst, Yasuharu Nakashima, Scott Tashman, Freddie H Fu
BACKGROUND: A high graft bending angle (GBA) after anterior cruciate ligament (ACL) reconstruction has been suggested to cause stress on the graft. Nevertheless, evidence about its effect on graft healing in vivo is limited. HYPOTHESIS: The signal intensity on magnetic resonance imaging (MRI) would be higher in the proximal region of the ACL graft, and higher signals would be correlated to a higher GBA. STUDY DESIGN: Descriptive laboratory study...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28394179/1-d-blood-flow-modelling-in-a-running-human-body
#5
Viktor Szabó, Gábor Halász
In this paper an attempt was made to simulate blood flow in a mobile human arterial network, specifically, in a running human subject. In order to simulate the effect of motion, a previously published immobile 1-D model was modified by including an inertial force term into the momentum equation. To calculate inertial force, gait analysis was performed at different levels of speed. Our results show that motion has a significant effect on the amplitudes of the blood pressure and flow rate but the average values are not effected significantly...
April 10, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28376781/fatigue-strength-of-bovine-articular-cartilage-on-bone-under-three-point-bending-the-effect-of-loading-frequency
#6
H Sadeghi, D M Espino, D E T Shepherd
BACKGROUND: The objective of this study was to determine the influence of loading frequency on the failure of articular cartilage-on-bone specimens under three-point bending. METHODS: In this study, cyclic three-point bending was used to introduce failure into cartilage-on-bone specimens at varying loading frequencies. Sinusiodally varying maximum compressive loads in the range 40-130 N were applied to beam-shaped cartilage-on-bone specimens at frequencies of 1, 10, 50 and 100 Hz...
April 4, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28366438/measuring-joint-kinematics-of-treadmill-walking-and-running-comparison-between-an-inertial-sensor-based-system-and-a-camera-based-system
#7
Corina Nüesch, Elena Roos, Geert Pagenstert, Annegret Mündermann
Inertial sensor systems are becoming increasingly popular for gait analysis because their use is simple and time efficient. This study aimed to compare joint kinematics measured by the inertial sensor system RehaGait® with those of an optoelectronic system (Vicon®) for treadmill walking and running. Additionally, the test re-test repeatability of kinematic waveforms and discrete parameters for the RehaGait® was investigated. Twenty healthy runners participated in this study. Inertial sensors and reflective markers (PlugIn Gait) were attached according to respective guidelines...
March 21, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28351803/establishing-a-reliable-gait-evaluation-method-for-rodent-studies
#8
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/28303754/effects-of-running-experience-on-coordination-and-its-variability-in-runners
#9
Pablo Floría, Alberto Sánchez-Sixto, Reed Ferber, Andrew J Harrison
The purpose of this study was to examine the differences in coordination variability in running gait between trained runners and non-runners using continuous relative phase (CRP) analysis. Lower extremity kinematic data were collected for 22 participants during the stance phase. The participants were assigned to either a runner or non-runner group based on running volume training. Segment coordination and coordination variability were calculated for selected hip-knee and knee-ankle couplings. Independent t-tests and magnitude-based inferences were used to compare the 2 groups...
March 17, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28301525/muscle-activities-during-walking-and-running-at-energetically-optimal-transition-speed-under-normobaric-hypoxia-on-gradient-slopes
#10
Daijiro Abe, Yoshiyuki Fukuoka, Masahiro Horiuchi
Energy cost of transport per unit distance (CoT; J·kg-1·km-1) displays a U-shaped fashion in walking and a linear fashion in running as a function of gait speed (v; km·h-1). There exists an intersection between U-shaped and linear CoT-v relationships, being termed energetically optimal transition speed (EOTS; km·h-1). Combined effects of gradient and moderate normobaric hypoxia (15.0% O2) were investigated when walking and running at the EOTS in fifteen young males. The CoT values were determined at eight walking speeds (2...
2017: PloS One
https://www.readbyqxmd.com/read/28269460/monitoring-of-paces-and-gaits-using-binary-pir-sensors-with-rehabilitation-treadmill
#11
Jiang Lu, Ting Zhang, Qingquan Sun, Sanobar Kadiwal, Ishaq Unwala, Fei Hu
Recently, rehabilitation treadmills are designed for helping injured persons such as stroke patients and injury athletes in the process of physical therapy. By monitoring the changes of paces and gaits, one can estimate the progress of rehabilitation. At present, most devices that can estimate paces and gaits are wearable and/or expensive. This paper presents an inexpensive, non-intrusive wireless binary sensor system for pace estimation and lower-extreme gait recognition with low data throughput and high energy efficiency...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268695/development-of-a-real-time-activity-monitoring-android-application-utilizing-smartstep
#12
Nagaraj Hegde, Edward Melanson, Edward Sazonov
Footwear based activity monitoring systems are becoming popular in academic research as well as consumer industry segments. In our previous work, we had presented developmental aspects of an insole based activity and gait monitoring system-SmartStep, which is a socially acceptable, fully wireless and versatile insole. The present work describes the development of an Android application that captures the SmartStep data wirelessly over Bluetooth Low energy (BLE), computes features on the received data, runs activity classification algorithms and provides real time feedback...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28261436/orthopedic-manifestations-of-type-i-camurati-engelmann-disease
#13
Alisher J Yuldashev, Chang Ho Shin, Yong Sung Kim, Woo Young Jang, Moon Seok Park, Jong Hee Chae, Won Joon Yoo, In Ho Choi, Ok Hwa Kim, Tae-Joon Cho
BACKGROUND: Camurati-Engelmann disease (CED) is a rare genetic skeletal disorder characterized by limb pain, muscle emaciation and weakness, and cortical thickening of the diaphysis of long bones. It is caused by mutations in the transforming growth factor beta 1 (TGFB1) (type I) or other unknown gene(s) (type II). We present 8 consecutive patients with type I CED. METHODS: We retrospectively reviewed medical records and radiographs of type I CED patients with special reference to the mode of presentation, process of diagnostic work-up, and disease course...
March 2017: Clinics in Orthopedic Surgery
https://www.readbyqxmd.com/read/28253053/kinematic-gait-patterns-in-competitive-and-recreational-runners
#14
Christian A Clermont, Sean T Osis, Angkoon Phinyomark, Reed Ferber
Certain homogeneous running subgroups demonstrate distinct kinematic patterns in running; however, the running mechanics of competitive and recreational runners are not well understood. Therefore, the purpose of this study was to determine whether we could separate and classify competitive and recreational runners according to gait kinematics using multivariate analyses and a machine learning approach. Participants were allocated to the 'competitive' (n=20) or 'recreational' group (n=15) based on age, gender, and recent race performance...
March 2, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28243533/gait-changes-in-a-line-of-mice-artificially-selected-for-longer-limbs
#15
Leah M Sparrow, Emily Pellatt, Sabrina S Yu, David A Raichlen, Herman Pontzer, Campbell Rolian
In legged terrestrial locomotion, the duration of stance phase, i.e., when limbs are in contact with the substrate, is positively correlated with limb length, and negatively correlated with the metabolic cost of transport. These relationships are well documented at the interspecific level, across a broad range of body sizes and travel speeds. However, such relationships are harder to evaluate within species (i.e., where natural selection operates), largely for practical reasons, including low population variance in limb length, and the presence of confounding factors such as body mass, or training...
2017: PeerJ
https://www.readbyqxmd.com/read/28227710/monitoring-of-paces-and-gaits-using-binary-pir-sensors-with-rehabilitation-treadmill
#16
Jiang Lu, Ting Zhang, Qingquan Sun, Sanobar Kadiwal, Ishaq Unwala, Fei Hu, Jiang Lu, Ting Zhang, Qingquan Sun, Sanobar Kadiwal, Ishaq Unwala, Fei Hu, Ting Zhang, Ishaq Unwala, Qingquan Sun, Jiang Lu, Sanobar Kadiwal, Fei Hu
Recently, rehabilitation treadmills are designed for helping injured persons such as stroke patients and injury athletes in the process of physical therapy. By monitoring the changes of paces and gaits, one can estimate the progress of rehabilitation. At present, most devices that can estimate paces and gaits are wearable and/or expensive. This paper presents an inexpensive, non-intrusive wireless binary sensor system for pace estimation and lower-extreme gait recognition with low data throughput and high energy efficiency...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226882/development-of-a-real-time-activity-monitoring-android-application-utilizing-smartstep
#17
Nagaraj Hegde, Edward Melanson, Edward Sazonov, Nagaraj Hegde, Edward Melanson, Edward Sazonov, Nagaraj Hegde, Edward Melanson, Edward Sazonov
Footwear based activity monitoring systems are becoming popular in academic research as well as consumer industry segments. In our previous work, we had presented developmental aspects of an insole based activity and gait monitoring system-SmartStep, which is a socially acceptable, fully wireless and versatile insole. The present work describes the development of an Android application that captures the SmartStep data wirelessly over Bluetooth Low energy (BLE), computes features on the received data, runs activity classification algorithms and provides real time feedback...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224442/report-of-the-primary-outcomes-for-gait-mechanics-in-men-of-the-acl-sports-trial-secondary-prevention-with-and-without-perturbation-training-does-not-restore-gait-symmetry-in-men-1-or-2-years-after-acl-reconstruction
#18
Jacob John Capin, Ryan Zarzycki, Amelia Arundale, Kathleen Cummer, Lynn Snyder-Mackler
BACKGROUND: Movement asymmetries during walking are common after anterior cruciate ligament (ACL) injury and reconstruction and may influence the early development of posttraumatic osteoarthritis. Preoperative neuromuscular training (like perturbation training, which is neuromuscular training requiring selective muscle activation in response to surface perturbations) improves gait asymmetries and functional outcomes among people who are ACL-deficient, but the effect of postoperative perturbation training on gait mechanics after ACL reconstruction is unknown...
February 21, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28211509/climbing-favours-the-tripod-gait-over-alternative-faster-insect-gaits
#19
Pavan Ramdya, Robin Thandiackal, Raphael Cherney, Thibault Asselborn, Richard Benton, Auke Jan Ijspeert, Dario Floreano
To escape danger or catch prey, running vertebrates rely on dynamic gaits with minimal ground contact. By contrast, most insects use a tripod gait that maintains at least three legs on the ground at any given time. One prevailing hypothesis for this difference in fast locomotor strategies is that tripod locomotion allows insects to rapidly navigate three-dimensional terrain. To test this, we computationally discovered fast locomotor gaits for a model based on Drosophila melanogaster. Indeed, the tripod gait emerges to the exclusion of many other possible gaits when optimizing fast upward climbing with leg adhesion...
February 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28195978/lack-of-influence-of-muscular-performance-parameters-on-spatio-temporal-adaptations-with-increased-running-velocity
#20
Luis E Roche-Seruendo, Felipe García-Pinillos, Joana Haicaguerre, Ana V Bataller-Cervero, Víctor M Soto-Hermoso, Pedro Á Latorre-Román
This study aimed to analyse the influence of muscular performance parameters on spatio-temporal gait characteristics during running when gradually increasing speed. 51 recreationally trained male endurance runners (age: 28 ± 8 years) voluntarily participated in this study. Subjects performed a battery of jumping tests (squat jump, countermovement jump, and 20 cm drop jump), and after that, the subjects performed an incremental running test (10 to 20 km/h) on a motorized treadmill. Spatio-temporal parameters were measured using the OptoGait system...
February 8, 2017: Journal of Strength and Conditioning Research
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