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https://www.readbyqxmd.com/read/29781934/absolute-reliability-and-concurrent-validity-of-the-stryd-system-for-the-assessment-of-running-stride-kinematics-at-different-velocities
#1
Felipe García-Pinillos, Luis E Roche-Seruendo, Noel Marcén-Cinca, Luis A Marco-Contreras, Pedro A Latorre-Román
García-Pinillos, F, Roche-Seruendo, LE, Marcen-Cinca, N, Marco-Contreras, LA, and Latorre-Román, PA. Absolute reliability and concurrent validity of the Stryd system for the assessment of running stride kinematics at different velocities. J Strength Cond Res XX(X): 000-000, 2018-This study aimed to determine the absolute reliability and to evaluate the concurrent validity of the Stryd system for measuring spatiotemporal variables during running at different velocities (8-20 km·h) by comparing data with another widely used device (the OptoGait system)...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29696808/gas-stabilizing-gold-nanocones-for-acoustically-mediated-drug-delivery
#2
Christophoros Mannaris, Boon M Teo, Anjali Seth, Luca Bau, Constantin Coussios, Eleanor Stride
The efficient penetration of drugs into tumors is a major challenge that remains unmet. Reported herein is a strategy to promote extravasation and enhanced penetration using inertial cavitation initiated by focused ultrasound and cone-shaped gold nanoparticles that entrap gas nanobubbles. The cones are capable of initiating inertial cavitation under pressures and frequencies achievable with existing clinical ultrasound systems and of promoting extravasation and delivery of a model large therapeutic molecule in an in vitro tissue mimicking flow phantom, achieving penetration depths in excess of 2 mm...
April 25, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29680380/a-single-hydrotherapy-session-increases-range-of-motion-and-stride-length-in-labrador-retrievers-diagnosed-with-elbow-dysplasia
#3
T Preston, A P Wills
Canine elbow dysplasia is a debilitating condition of unknown aetiology and is a common cause of forelimb lameness in dogs. Canine hydrotherapy is a therapeutic approach rapidly increasing in popularity for the treatment of a range of musculoskeletal pathologies. In this study, kinematic analysis was used to assess the effect of a customised hydrotherapy session on the range of motion, stride length and stride frequency of healthy Labrador retrievers (n=6) and Labrador retrievers diagnosed with bilateral elbow dysplasia (n=6)...
April 2018: Veterinary Journal
https://www.readbyqxmd.com/read/29658527/the-differences-between-overground-and-treadmill-walking-in-nonlinear-entropy-based-and-frequency-variables-derived-from-accelerometers-in-young-and-older-women-preliminary-report
#4
Lucia Bizovska, Zdenek Svoboda, Eliska Kubonova, Nicolas Vuillerme, Zuzana Hirjakova, Miroslav Janura
PURPOSE: The aim of this study was to compare gait stability and variability between walking conditions and age groups. METHODS: Twenty-six healthy younger and older females participated. Trunk acceleration in the vertical (V), medial-lateral (ML) and anteriorposterior (AP) directions during 5 minutes walking overground and 3 minutes walking on the treadmill at self-selected speed were recorded. Root mean square and standard deviations of acceleration, stride time and its variability, Lyapunov exponents (LE), multiscale entropy (MSE) and harmonic ratios (HR) were computed...
2018: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29627750/effect-of-interactive-cognitive-motor-training-on-gait-and-balance-among-older-adults-a-randomized-controlled-trial
#5
Ching-Chiu Kao, Huei-Ling Chiu, Doresses Liu, Pi-Tuan Chan, Ing-Jy Tseng, Ruey Chen, Shu-Fen Niu, Kuei-Ru Chou
BACKGROUND: Aging is a normal degenerative process that results in a decline in the gait and balance performance of older adults. Interactive cognitive motor training is an intervention that integrates cognitive and motor tasks to promote individuals' physical and cognitive fall risk factors. However, the additive effects of the interactive cognitive motor training on objective quantitative data and comprehensive descriptions of gait and balance warrants further investigation. OBJECTIVES: To investigate the effect of interactive cognitive motor training on older adults' gait and balance from immediate to long-term time points...
March 23, 2018: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/29610933/treadmill-locomotion-of-the-mouse-lemur-microcebus-murinus-kinematic-parameters-during-symmetrical-and-asymmetrical-gaits
#6
Marc Herbin, Eva Hommet, Vicky Hanotin-Dossot, Martine Perret, Rémi Hackert
The gaits of the adult grey mouse lemur Microcebus murinus were studied during treadmill locomotion over a large range of velocities. The locomotion sequences were analysed to determine the gait and the various spatiotemporal gait parameters of the limbs. We found that velocity adjustments are accounted for differently by stride frequency and stride length depending on whether the animal showed a symmetrical or an asymmetrical gait. When using symmetrical gaits the increase in velocity is associated with a constant contribution of the stride length and stride frequency; the increase of the stride frequency being always lower...
April 2, 2018: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29601511/the-height-adaptive-parameterized-step-length-measurement-method-and-experiment-based-on-motion-parameters
#7
Yanshun Zhang, Yingyue Li, Chuang Peng, Dong Mou, Ming Li, Wei Wang
In order to tackle the inaccurate step length measurement of people with different heights and in different motion states, a height-adaptive method of step length measurement based on motion parameters is proposed in this paper. This method takes people's height, stride frequency, and changing accelerometer output while walking into integrated consideration, and builds a dynamic and parameterized model of their step length. In this study, these parameters were calibrated with thirty sets of experiment data from people with different heights and in different motion states, which were then verified experimentally by motion data of randomly selected subjects, regardless of speed and height...
March 30, 2018: Sensors
https://www.readbyqxmd.com/read/29564844/effects-of-high-intensity-warm-ups-on-running-performance
#8
Fernando González-Mohíno, Raúl Martín, Daniel Juárez Santos-García, Pedro Angel Fidel, Francisco de Asis Fernandez, Inmaculada Yustres, José María González Ravé
The objective of this study was to determine the effects of high-intensity warm-ups (WUs) on performance, physiological, neuromuscular and biomechanical parameters. Three randomized cross-over 105%vVO2 max time limit trials (TLimT) were performed by 11 well-trained runners following three different WU protocols. These included two experimental high-intensity variants and one control WU variant: (i) 9x20-sec level strides (105%vVO2 max; 1% gradient) with 60 s of recovery (level); (ii) 6x6-sec uphill strides (105%vVO2 max; 5% gradient), with the same recovery (uphill) and (iii) 7 min at 60%vVO2 max as control condition (control)...
March 21, 2018: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/29517422/locomotor-respiratory-coupling-is-maintained-in-simulated-moderate-altitude-in-trained-distance-runners
#9
Timothy J Fulton, Hunter L Paris, Abigail S L Stickford, Allison H Gruber, Timothy D Mickleborough, Robert F Chapman
To determine if acute exposure to simulated moderate altitude alters locomotor-respiratory coupling (LRC) patterns in runners, 13 trained male distance runners performed a running economy and maximal oxygen uptake (V̇O2max ) test in normoxia (NORM) and hypoxia (HYP) (FIO2 = 15.8%; ~ 2400m / 8000ft) on separate days. Running economy (RE), the degree of LRC, stride frequency-to-breathing frequency quotients (SF/fb ), ratings of perceived exertion (RPE), and dyspnea (DYS) were assessed at three common submaximal speeds and V̇O2max ...
March 8, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29494820/influence-of-stride-frequency-manipulation-on-muscle-activity-during-running-with-body-weight-support
#10
Kenji Masumoto, Jared Joerger, John A Mercer
BACKGROUND: Running with body weight support (BWS) has been used for physical fitness enhancement. Nevertheless, gait mechanics of running with BWS is not fully understood. RESEARCH QUESTION: We investigated influence of stride frequency manipulation on muscle activity during running at various BWS conditions. METHODS: Nineteen participants (23.8 ± 4.1 years) ran on a lower body positive pressure treadmill at their preferred speed and preferred stride frequency (PSF) for 0%BWS, 50%BWS, and 80%BWS conditions...
March 2018: Gait & Posture
https://www.readbyqxmd.com/read/29427859/preliminary-concurrent-validity-of-the-fitbit-zip-and-actigraph-activity-monitors-for-measuring-steps-in-people-with-polymyalgia-rheumatica
#11
Anish Chandrasekar, Elizabeth M A Hensor, Sarah L Mackie, Michael R Backhouse, Emma Harris
BACKGROUND: Activity monitors provide objective measurements of physical activity, however, the accuracy of these devices in people with polymyalgia rheumatica (PMR) is unknown. Therefore, this study aimed to obtain preliminary evidence of the accuracy of two activity monitors and explore if clinical and gait-related factors altered device accuracy in people with PMR. METHODS: The ActiGraph with low frequency extension (+LFE) and standard (-LFE) algorithms, Fitbit-Zip (waist) and Fitbit-Zip (shirt) were concurrently tested using a two-minute walk test (2MWT) and stairs test in 27 people with PMR currently treated with prednisolone...
March 2018: Gait & Posture
https://www.readbyqxmd.com/read/29395227/the-relationships-between-physical-capacity-and-biomechanical-plasticity-in-old-adults-during-level-and-incline-walking
#12
Daniel Kuhman, John Willson, J C Mizelle, Paul DeVita
Old compared to young adults exhibit increased hip and decreased ankle mechanical output during walking - a phenomenon known as biomechanical plasticity. Previous comparison studies suggest that low compared to high capacity old adults exhibit larger magnitudes of this plasticity, however the precise relationship between capacity and plasticity magnitude remains unclear. The purpose of this study was to quantify the relationships between physical capacity and biomechanical plasticity magnitude during level and incline walking...
March 1, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29339981/using-bilateral-functional-and-anthropometric-tests-to-define-symmetry-in-cross-country-skiers
#13
Glenn Björklund, Marie Alricsson, Ulla Svantesson
The aim of this study was to evaluate the symmetry of anthropometry and muscle function in cross-country skiers and their association to vertical jumping power. Twenty cross-country skiers were recruited (21.7 ± 3.8 yrs, 180.6 ± 7.6 cm, 73.2 ± 7.6 kg). Anthropometric data was obtained using an iDXA scan. VO2max was determined using the diagonal stride technique on a ski treadmill. Bilateral functional tests for the upper and lower body were the handgrip and standing heel-rise tests. Vertical jump height and power were assessed with a counter movement jump...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29331720/temporal-spatial-gait-parameter-models-of-very-slow-walking
#14
Andrew J J Smith, Edward D Lemaire
This study assessed the relationship between walking speed and common temporal-spatial stride-parameters to determine if a change in gait strategy occurs at extremely slow walking speeds. Stride-parameter models that represent slow walking can act as a reference for lower extremity exoskeleton and powered orthosis controls since these devices typically operate at walking speeds less than 0.4 m/s. Full-body motion capture data were collected from 30 health adults while walking on a self-paced treadmill, within a CAREN-Extended virtual reality environment...
March 2018: Gait & Posture
https://www.readbyqxmd.com/read/29313896/great-ape-walking-kinematics-implications-for-hominoid-evolution
#15
Emma M Finestone, Mary H Brown, Stephen R Ross, Herman Pontzer
OBJECTIVES: Great apes provide a point of reference for understanding the evolution of locomotion in hominoids and early hominins. We assessed (1) the extent to which great apes use diagonal sequence, diagonal couplet gaits, like other primates, (2) the extent to which gait and posture vary across great apes, and (3) the role of body mass and limb proportions on ape quadrupedal kinematics. METHODS: High-speed digital video of zoo-housed bonobos (Pan paniscus, N = 8), chimpanzees (Pan troglodytes, N = 13), lowland gorillas (Gorilla gorilla, N = 13), and orangutans (Pongo spp...
January 4, 2018: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/29244216/relationship-between-glenoid-deformity-and-gait-characteristics-in-a-rat-model-of-neonatal-brachial-plexus-injury
#16
Kelsey Hennen, Dustin L Crouch, Ian D Hutchinson, Zhongyu Li, Katherine Saul
Neonatal brachial plexus injury (NBPI) results in substantial postural and functional impairments associated with underlying muscular and osseous deformities. We examined the relationship between glenoid deformity severity and gait in a rat model of NBPI, an established model for studying the in vivo pathomechanics of NBPI. At 8 weeks post-operatively, we monitored the gait of 24 rat pups who exhibited varying degrees of glenoid deformity following unilateral brachial plexus neurectomy and chemodenervation interventions administered 5 days postnatal...
December 15, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29243945/coordination-in-gait-demonstration-of-a-spectral-approach
#17
Genevieve K R Williams, Domenico Vicinanza
Many important notions in Life Sciences are linked with the idea of cycles, periodicity, fluctuations and transitions. The aim of this paper is to use spectral analysis in a unique way to study and quantify whole body coordination during gait. A participant walked at 3 km/h and ran at 15 km/h on a treadmill for 2 minutes. Position of the approximate center of rotation of the toe, ankle, knee, hip, shoulder, elbow and wrist, heel, PSIS and head were collected (CODAmotion; 100 Hz). Fast Fourier Transform was performed on x-coordinate data of the 1) knee marker; 2) 4 markers attached to the free lower limb (toe, ankle, heel and knee); 3) left and right free lower limbs; 4) whole body (all markers)...
August 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29193393/modified-first-or-second-cervical-nerve-transplantation-technique-for-the-treatment-of-recurrent-laryngeal-neuropathy-in-horses
#18
F Rossignol, O Brandenberger, J D Perkins, J-P Marie, C Mespoulhès-Rivière, N G Ducharme
BACKGROUND: In horses, the only established method for reinnervation of the larynx is the nerve-muscle pedicle implantation, whereas in human medicine, direct nerve implantation is a standard surgical technique for selective laryngeal reinnervation in human patients suffering from bilateral vocal fold paralysis. OBJECTIVES: (1) To describe a modified first or second cervical nerve transplantation technique for the treatment of recurrent laryngeal neuropathy (RLN) in horses and (2) evaluate the outcomes of reinnervation using direct nerve needle-stimulation of the first cervical nerve and exercising endoscopy before and after surgery...
November 28, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29176075/detection-of-surface-emg-activity-from-the-extensor-digitorum-brevis-muscle-in-healthy-children-walking
#19
Francesco Di Nardo, Annachiara Strazza, Michela Sara Palmieri, Alessandro Mengarelli, Laura Burattini, Ornella Orsini, Antonio Bortone, Sandro Fioretti
OBJECTIVE: The purpose of the study was the assessment of activation patterns of the extensor digitorum brevis (EDB) muscle in healthy children, during walking at self-selected speed and cadence. APPROACH: To this end, statistical gait analysis was performed on surface electromyographic (sEMG) signals of the EDB, in a large number (hundreds) of strides per subject. sEMG data from the tibialis anterior (TA) and gastrocnemius lateralis (GL) were also investigated for comparative purposes...
January 30, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29170707/is-the-relationship-between-stride-length-frequency-and-velocity-influenced-by-running-on-a-treadmill-or-overground
#20
Joshua Bailey, Tiffany Mata, John A Mercer
The purpose of the study was to compare the relationship between stride length (SL), stride frequency (SF), and velocity while running on a treadmill and overground. Participants (n=10; 22.3±2.6 yrs; 1.71±.08 m; 71.4±15.5 kg) completed a total of 14 runs (7 treadmill, 7 overground) with each run at a different velocity. SL, SF, and velocity data were recorded using wearable technology (Garmin, Fenix2). The outdoor trials occurred first. The treadmill velocities were selected to match the range of velocities used overgroud...
2017: International Journal of Exercise Science
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