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https://www.readbyqxmd.com/read/28545560/influences-of-lumbar-disc-herniation-on-the-kinematics-in-multi-segmental-spine-pelvis-and-lower-extremities-during-five-activities-of-daily-living
#1
Shengzheng Kuai, Wenyu Zhou, Zhenhua Liao, Run Ji, Daiqi Guo, Rui Zhang, Weiqiang Liu
BACKGROUND: Low back pain (LBP) is a common problem that can contribute to motor dysfunction. Previous studies reporting the changes in kinematic characteristics caused by LBP present conflicting results. This study aimed to apply the multisegmental spinal model to investigate the kinematic changes in patients with lumbar disc herniation (LDH) during five activities of daily living (ADLs). METHODS: Twenty-six healthy subjects and 7 LDH patients participated in this study and performed level walking, stair climbing, trunk flexion, and ipsilateral and contralateral pickups...
May 25, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28542090/5-km-time-trial-reliability-of-a-non-motorized-treadmill-and-comparison-of-physiological-and-perceptual-responses-versus-a-motorized-treadmill
#2
Hunter S Waldman, Alex J Heatherly, Ashton F Waddell, Ben M Krings, Eric K O'Neal
This study examined the reproducibility of performance across 3 non-motorized treadmill (NMT) 5-km time trials (TT) and physiological, gait, and perceptual differences of running at 5-km pace for both NMT and motorized treadmills (MT). Ten male runners experienced in road racing that had never run on a NMT completed 3 TT to establish personal best 5-km pace. In a later session, participants ran at this pace for 5 min on the NMT while metabolic, gait, and perceptual measures were recorded and then ran at outdoor 5-km personal best pace on a MT at 1% grade (counter-balanced crossover design)...
May 24, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28535432/water-depth-effects-on-impact-loading-kinematic-and-physiological-variables-during-water-treadmill-running
#3
Paul W Macdermid, Josh Wharton, Carina Schill, Philip W Fink
PURPOSE: The purpose of this study was to compare impact loading, kinematic and physiological responses to three different immersion depths (mid-shin, mid-thigh, and xiphoid process) while running at the same speed on a water based treadmill. METHODS: Participants (N=8) ran on a water treadmill at three depths for 3min. Tri-axial accelerometers were used to identify running dynamics plus measures associated with impact loading rates, while heart rate data were logged to indicate physiological demand...
May 17, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28515449/the-role-of-stride-frequency-for-walk-to-run-transition-in-humans
#4
Ernst Albin Hansen, Lasse Andreas Risgaard Kristensen, Andreas Møller Nielsen, Michael Voigt, Pascal Madeleine
It remains unclear why humans spontaneously shift from walking to running at a certain point during locomotion at gradually increasing velocity. We show that a calculated walk-to-run transition stride frequency (70.6 ± 3.2 strides min(-1)) agrees with a transition stride frequency (70.8 ± 3.1 strides min(-1)) predicted from the two stride frequencies applied during treadmill walking and running at freely chosen velocities and freely chosen stride frequencies. The agreement is based on Bland and Altman's statistics...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28514926/trunk-muscle-activity-patterns-and-motion-patterns-of-patients-with-motor-complete-spinal-cord-injury-at-t8-and-t10-walking-with-different-un-powered-exoskeletons
#5
Xinyu Guan, Shengzheng Kuai, Linhong Ji, Rencheng Wang, Run Ji
OBJECTIVE: The aim of this study was to explore how neurological injured levels of spinal cord affect the performance of patients walking with different un-powered exoskeletons. STUDY DESIGN: Case series observational study. SETTING: Gait and Motion Analysis Laboratory at the National Research Center Rehabilitation Technical Aids. METHODS: Electromyography and motion data from two subjects with complete spinal cord injury at T10 and T8 walking with un-powered exoskeletons were collected simultaneously...
May 17, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28503379/a-public-dataset-of-running-biomechanics-and-the-effects-of-running-speed-on-lower-extremity-kinematics-and-kinetics
#6
Reginaldo K Fukuchi, Claudiane A Fukuchi, Marcos Duarte
BACKGROUND: The goals of this study were (1) to present the set of data evaluating running biomechanics (kinematics and kinetics), including data on running habits, demographics, and levels of muscle strength and flexibility made available at Figshare (DOI: 10.6084/m9.figshare.4543435); and (2) to examine the effect of running speed on selected gait-biomechanics variables related to both running injuries and running economy. METHODS: The lower-extremity kinematics and kinetics data of 28 regular runners were collected using a three-dimensional (3D) motion-capture system and an instrumented treadmill while the subjects ran at 2...
2017: PeerJ
https://www.readbyqxmd.com/read/28491016/a-channel-rejection-method-for-attenuating-motion-related-artifacts-in-eeg-recordings-during-walking
#7
Anderson S Oliveira, Bryan R Schlink, W David Hairston, Peter König, Daniel P Ferris
Recording scalp electroencephalography (EEG) during human motion can introduce motion artifacts. Repetitive head movements can generate artifact patterns across scalp EEG sensors. There are many methods for identifying and rejecting bad channels and independent components from EEG datasets, but there is a lack of methods dedicated to evaluate specific intra-channel amplitude patterns for identifying motion-related artifacts. In this study, we proposed a template correlation rejection (TCR) as a novel method for identifying and rejecting EEG channels and independent components carrying motion-related artifacts...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28488928/do-subjective-assessments-of-running-patterns-reflect-objective-parameters
#8
Thibault Lussiana, Cyrille Gindre, Laurent Mourot, Kim Hébert-Losier
Running patterns are often categorized into subgroups according to common features before data analysis and interpretation. The Volodalen(®) method is a simple field-based tool used to classify runners into aerial or terrestrial using a 5-item subjective rating scale. We aimed to validate the Volodalen(®) method by quantifying the relationship between its subjective scores and 3D biomechanical measures. Fifty-four runners ran 30 s on a treadmill at 10, 12, 14, 16, and 18 km h(-1) while their kinematics were assessed subjectively using the Volodalen(®) method and objectively using 3D motion capture...
May 10, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28485300/gait-studies-for-a-quadrupedal-microrobot-reveal-contrasting-running-templates-in-two-frequency-regimes
#9
Benjamin Goldberg, Neel Doshi, Kaushik Jayaram, Robert Wood
Performance metrics such as speed, cost of transport, and stability are the driving factors behind gait selection in legged locomotion. To help understand the effect of gait on the performance and dynamics of small-scale ambulation, we explore four quadrupedal gaits over a wide range of stride frequencies on a 1.43g, biologically-inspired microrobot, the Harvard Ambulatory MicroRobot (HAMR). Despite its small size, HAMR can precisely control leg frequency, phasing, and trajectory, making it an exceptional platform for gait studies at scales relevant to insect locomotion...
May 9, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28476901/is-combining-gait-retraining-or-an-exercise-programme-with-education-better-than-education-alone-in-treating-runners-with-patellofemoral-pain-a-randomised-clinical-trial
#10
Jean-Francois Esculier, Laurent Julien Bouyer, Blaise Dubois, Pierre Fremont, Lynne Moore, Bradford McFadyen, Jean-Sébastien Roy
DESIGN: Single-blind randomised clinical trial. OBJECTIVE: To compare the effects of three 8-week rehabilitation programmes on symptoms and functional limitations of runners with patellofemoral pain (PFP). METHODS: Sixty-nine runners with PFP were randomly assigned to one of three intervention groups: (1) education on symptoms management and training modifications (education); (2) exercise programme in addition to education (exercises); (3) gait retraining in addition to education (gait retraining)...
May 5, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28468814/metabolic-cost-of-human-hopping
#11
Anne K Gutmann, John E A Bertram
To interpret the movement strategies employed in locomotion, it is necessary to understand the source of metabolic cost. Muscles must consume metabolic energy to do work, but also must consume energy to generate force. The energy lost during steady locomotion and, hence, the amount of mechanical work muscles need to perform to replace it can be reduced and, in theory, even eliminated by elastically storing and returning some portion of this energy via the tendons. However, even if muscles do not need to perform any mechanical work, they still must generate sufficient force to tension tendons and support body weight...
May 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28459694/automatic-assessment-of-a-rollator-user-s-condition-during-rehabilitation-using-the-i-walker-platform
#12
Joaquin Ballesteros, Cristina Urdiales, Antonio B Martinez, Marina Tirado Reyes
Patient condition during rehabilitation has been traditionally assessed using clinical scales. These scales typically require the patient and/or the clinician to rate a number of condition related items to obtain a final score. This is a timeconsuming task, specially if a large number of patients is involved. Furthermore, during rehabilitation, user condition is expected to change steadily in time, so assessment may require to run these scales several times to each user. To save time, much effort has been focused on developing clinical scales that require little time to be completed...
April 25, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28454909/asymmetric-interlimb-role-sharing-in-mechanical-power-during-human-sideways-locomotion
#13
Daichi Yamashita, Keisuke Fujii, Shinsuke Yoshioka, Tadao Isaka, Motoki Kouzaki
Sideways movement at a wide variety of speeds is required in daily life and sports. The purpose of this study was to identify the characteristics of asymmetry in power output between lower limbs during sideways gait patterns. Seven healthy men performed steady-state sideways locomotion at various speeds. The mechanical external power of each limb was calculated and decomposed to the lateral and vertical components by the center of mass velocity and ground reaction force. We acquired data from 126 steps of sideways walking at 0...
April 12, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28423061/muscle-contributions-to-medial-tibiofemoral-compartment-contact-loading-following-acl-reconstruction-using-semitendinosus-and-gracilis-tendon-grafts
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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