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https://www.readbyqxmd.com/read/28538992/intercepting-a-moving-target-on-line-or-model-based-control
#1
Huaiyong Zhao, William H Warren
When walking to intercept a moving target, people take an interception path that appears to anticipate the target's trajectory. According to the constant bearing strategy, the observer holds the bearing direction of the target constant based on current visual information, consistent with on-line control. Alternatively, the interception path might be based on an internal model of the target's motion, known as model-based control. To investigate these two accounts, participants walked to intercept a moving target in a virtual environment...
May 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28534647/considering-built-environment-and-spatial-correlation-in-modelling-pedestrian-injury-severity
#2
Carlo G Prato, Sigal Kaplan, Alexandre Patrier, Thomas K Rasmussen
OBJECTIVE: This study looks at mitigating and aggravating factors that are associated with the injury severity of pedestrians when they have crashes with another road user and overcomes existing limitations in the literature by posing attention on the built environment and considering spatial correlation across crashes. METHOD: Reports for 6539 pedestrian crashes occurred in Denmark between 2006 and 2015 were merged with geographic information system resources containing detailed information about built environment and exposure at the crash locations...
May 23, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28534497/a-comparative-study-of-two-protocols-for-treadmill-walking-exercise-testing-in-ambulating-subjects-with-incomplete-spinal-cord-injury
#3
E Lundgaard, M F Wouda, V Strøm
STUDY DESIGN: This is a comparative study of two exercise testing protocols. OBJECTIVES: The objective of this study was to compare maximal oxygen uptake (VO2 max) and achieved criteria for maximal exercise testing between the Sunnaas Protocol-a newly designed treadmill exercise test protocol-and the Modified Bruce Protocol in persons with incomplete spinal cord injury (SCI). SETTING: This study was conducted in Sunnaas Rehabilitation Hospital, Norway...
May 23, 2017: Spinal Cord
https://www.readbyqxmd.com/read/28533617/estimated-lower-speed-boundary-at-which-the-walk-ratio-constancy-is-broken-in-healthy-adults
#4
Rumi Murakami, Yohei Otaka
[Purpose] The ratio of step length to cadence (walk ratio) is invariant over a wide range of speeds. However, no studies have investigated details of the change in the walk ratio at slow speeds. It is necessary to explore how walking behavior changes at a low speed to understand the slow walking observed in various conditions such as aging and pathological conditions. In this study, changes in the walk ratio at slow speeds were investigated, and a lower boundary was estimated at which the walk ratio constancy is broken...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28533608/changes-of-gait-parameters-following-constrained-weight-shift-training-in-patients-with-stroke
#5
Seok Hyun Nam, Sung Min Son, Kyoung Kim
[Purpose] This study aimed to investigate the effects of training involving compelled weight shift on the paretic lower limb on gait parameters and plantar pressure distribution in patients with stroke. [Subjects and Methods] Forty-five stroke patients participated in the study and were randomly divided into: group with a 5-mm lift on the non-paretic side for constrained weight shift training (5: constrained weight shift training) (n=15); group with a 10-mm lift on the non-paretic side for constrained weight shift training (10: constrained weight shift training) (n=15); or the control group (n=15)...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28533603/comparison-of-accelerometer-based-and-treadmill-based-analysis-systems-for-measuring-gait-parameters-in-healthy-adults
#6
Seung-Yeop Lim, Wan-Hee Lee
[Purpose] This study aimed to determine the correlation between accelerometer-based and treadmill-based analysis systems for measuring gait parameters during comfortable walking in healthy young adults. [Subjects and Methods] Twenty-three healthy adults participated in this study. Gait parameters were measured with simultaneous use of accelerometer-based and treadmill-based gait analysis systems, while participants walked for 30 s. [Results] There was a highly-significant correlation between the two systems with respect to cadence and velocity...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28532873/the-impact-of-incline-and-speed-of-treadmill-on-ankle-muscle-activity-in-middle-aged-adults
#7
Roghayeh Mohammadi, Chetan P Phadke
OBJECTIVE: Additional demands associated with changing walking incline and speed combined with normal aging related changes in muscle recruitment can make walking difficult. This study examined the effects of walking on a treadmill at different inclines and speeds on ankle muscles in healthy middle-aged adults. METHODS: Fifteen healthy subjects (10M/5F) walked on a standard treadmill at three different inclines (0°, 3°, and 6°) and speeds (self-selected, self-selected+20%, self-selected+40%)...
April 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/28530503/comparison-of-self-selected-walking-speeds-and-walking-speed-variability-when-data-are-collected-during-repeated-discrete-trials-and-during-continuous-walking
#8
Marcus J Brown, Laura A Hutchinson, Michael J Rainbow, Kevin J Deluzio, Alan R De Asha
A typical gait analysis data collection consists of a series of discrete trials, where a participant initiates gait, walks through a motion capture volume, and then terminates gait. This is not a normal 'everyday' gait pattern, yet measurements are considered representative of normal walking. However, walking speed, a global descriptor of gait quality that can affect joint kinematics and kinetics, may be different during discrete trials, compared to continuous walking. Therefore, the purpose of this study was to investigate the effect of continuous walking versus discrete trials on walking speed and walking speed variability...
May 22, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28530482/the-effect-of-backpack-load-carriage-on-the-kinetics-and-kinematics-of-ankle-and-knee-joints-during-uphill-walking
#9
Jinkyu Lee, Yong-Jin Yoon, Choongsoo S Shin
The purpose of this study was to investigate the effect of load carriage on the kinematics and kinetics of the ankle and knee joints during uphill walking, including joint work, range of motion (ROM), and stance time. Fourteen males walked at a self-selected speed on an uphill (15°) slope wearing military boots and carrying a rifle in hand without a backpack (control condition) and with a backpack. The results showed that the stance time significantly decreased with backpack carriage (p<.05). The mediolateral impulse significantly increased with backpack carriage (p<...
May 22, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28527234/impaired-postural-balance-correlates-with-complex-walking-performance-in-mildly-disabled-persons-with-multiple-sclerosis
#10
John Brincks, Elisabeth Due Andersen, Henrik Sørensen, Ulrik Dalgas
BACKGROUND: It is relevant to understand the possible influence of impaired postural balance on walking performance in multiple sclerosis (MS) gait rehabilitation. OBJECTIVE: We expected associations between impaired postural balance and complex walking performance in mildly disabled persons with MS, but not in healthy controls. METHODS: Thirteen persons with MS (Expanded Disability Status Scale = 2.5) and 13 healthy controls' walking performance were measured at fast walking speed, Timed Up & Go and Timed 25 Feet Walking...
May 13, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28527231/nordic-walking-improves-trunk-stability-and%C3%A2-gait-spatial-temporal-characteristics-in%C3%A2-people-with-parkinson-disease
#11
Marie-Anne Gougeon, Lei Zhou, Julie Nantel
BACKGROUND: This study aimed to assess the effect of walking with Nordic walking (NW) poles on postural stability and gait spatial-temporal characteristics in individuals with PD and to determine the cognitive load associated operating the poles. METHODS: Twelve individuals with PD (age: 61.6±11.7) were asked to perform four 90 s walking trials; with/without poles and with/without verbal fluency task (category fluency) after a 6-week independent NW training. We assessed gait spatial-temporal characteristics, and trunk postural stability using the APDM accelerometry system...
May 13, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28527227/correlation-of-the-gait-speed-with-the-quality-of-life-and-the-quality-of-life-classified-according-to-speed-based-community-ambulation-in-thai-stroke-survivors
#12
Phichamon Khanittanuphong, Suttipong Tipchatyotin
BACKGROUND: Gait abnormality commonly resulted from stroke which affected patients living and probably quality of life (QOL). OBJECTIVE: To assess the relationship between gait speed and the QOL in Thai stroke patients and to compare the QOL among three patient groups that were categorized by gait speed: i) household ambulators <0.4 m/s, ii) limited community ambulators 0.4-0.8 m/s and iii) community ambulators >0.8 m/s. METHODS: This was a cross-sectional descriptive research study...
May 19, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28526765/factors-associated-with-ischemic-stroke-survival-and-recovery-in-older-adults
#13
Divya Thekkethala Winovich, William T Longstreth, Alice M Arnold, Ravi Varadhan, Adina Zeki Al Hazzouri, Mary Cushman, Anne B Newman, Michelle C Odden
BACKGROUND AND PURPOSE: Little is known about factors that predispose older adults to poor recovery after a stroke. In this study, we sought to evaluate prestroke measures of frailty and related factors as markers of vulnerability to poor outcomes after ischemic stroke. METHODS: In participants aged 65 to 99 years with incident ischemic strokes from the Cardiovascular Health Study, we evaluated the association of several risk factors (frailty, frailty components, C-reactive protein, interleukin-6, and cystatin C) assessed before stroke with stroke outcomes of survival, cognitive decline (≥5 points on Modified Mini-Mental State Examination), and activities of daily living decline (increase in limitations)...
May 19, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28525311/telerehabilitation-of-patients-with-injuries-of-the-lower-extremities
#14
Andriy I Tsvyakh, Andriy J Hospodarskyy
INTRODUCTION: Timely access to orthopedic rehabilitation is an important problem for the Ukrainian healthcare system. The international orthopedic community aims to achieve the best possible outcome for patient care by modifying rehabilitation methods and using telemedicine technology. The theme of this article is to discuss the integration of telemedicine technology in the rehabilitation of patients with injuries of the lower extremities. MATERIALS AND METHODS: Consecutive patients were recruited over a 2-year period...
May 19, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28523992/nutrition-and-exercise-in-sarcopenia
#15
Stephen D Anton, Azumi Hida, Robert Mankowski, Andrew Layne, Lawrence Solberg, Arch G Mainous, Thomas W Buford
Sarcopenia is a debilitating condition that involves loss of muscle mass and function, which affects virtually everyone as they age, and can lead to frailty and ultimately disability. In growing recognition of the importance of both muscle strength and muscle mass relative to body size in contributing to functional decline, recent definitions have now incorporated grip strength and a correction for body mass as part of the key criteria that define sarcopenia. With this new definition, a much larger population of older adults are now at risk of sarcopenia...
December 27, 2016: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28521148/dual-task-interference-on-postural-sway-postural-transitions-and-gait-in-people-with-parkinson-s-disease-and-freezing-of-gait
#16
Ana Claudia de Souza Fortaleza, Martina Mancini, Patty Carlson-Kuhta, Laurie A King, John G Nutt, Eliane Ferrari Chagas, Ismael Forte Freitas, Fay B Horak
Freezing of gait (FoG) is associated with less automatic gait and more impaired cognition, balance and postural transitions compared to people with PD who do not have FoG. However, it is unknown whether dual-task cost during postural sway, postural transitions (such as gait initiation and turning), and gait are more in subjects with Parkinson's disease (PD) who have freezing of gait (FoG+) compared to those who do not have FoG (FoG-). Here, we hypothesized that the effects of a cognitive dual task on postural sway, postural transitions and gait would be larger in FoG+ than FoG-...
May 10, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28515070/even-mealtime-distribution-of-protein-intake-is-associated-with-greater-muscle-strength-but-not-with-3-y-physical-function-decline-in-free-living-older-adults-the-quebec-longitudinal-study-on-nutrition-as-a-determinant-of-successful-aging-nuage-study
#17
Samaneh Farsijani, Hélène Payette, José A Morais, Bryna Shatenstein, Pierrette Gaudreau, Stéphanie Chevalier
Background: Functional status declines with aging, thus impeding autonomy. Recently, a more even mealtime distribution of dietary protein was positively associated with muscle mass, but the relation of this distribution to physical performance remains unknown.Objective: We examined the relation between mealtime protein-intake distribution and physical performance and its 3-y decline in community-dwelling older adults.Design: Three-year follow-up data from 827 men and 914 women (67-84 y) in the longitudinal study on nutrition and aging [Quebec longitudinal study on Nutrition as a Determinant of Successful Aging (NuAge study); Quebec, Canada] were analyzed...
May 17, 2017: American Journal of Clinical Nutrition
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
#18
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/28514202/the-physical-characteristics-of-match-play-in-english-schoolboy-and-academy-rugby-union
#19
Dale B Read, Ben Jones, Padraic J Phibbs, Gregory A B Roe, Joshua Darrall-Jones, Jonathon J S Weakley, Kevin Till
The aim was to compare the physical characteristics of under-18 academy and schoolboy rugby union competition by position (forwards and backs). Using a microsensor unit, match characteristics were recorded in 66 players. Locomotor characteristics were assessed by maximum sprint speed (MSS) and total, walking, jogging, striding and sprinting distances. The slow component (<2 m · s(-1)) of PlayerLoad(TM) (PLslow), which is the accumulated accelerations from the three axes of movement, was analysed as a measure of low-speed activity (e...
May 17, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28513212/an-optical-fiber-based-smart-textile-smart-socks-to-manage-biomechanical-risk-factors-associated-with-diabetic-foot-amputation
#20
Bijan Najafi, Hooman Mohseni, Gurtej S Grewal, Talal K Talal, Robert A Menzies, David G Armstrong
OBJECTIVE: This study aimed to validate a smart-textile based on fiber-optics for simultaneous measurement of plantar temperature, pressure, and joint angles in patients with diabetic peripheral neuropathy (DPN). METHODS: After in-vitro validation in the laboratory, 33 eligible subjects with DPN were recruited (age: 58 ± 8 years, BMI: 31.5 ± 8 kg/m(2)) for assessing plantar pressure and temperature during habitual gait-speed in a clinical-setting. All participants were asked to walk at their habitual speed while wearing a pair of sensorized socks made from highly flexible fiber optics (SmartSox)...
May 1, 2017: Journal of Diabetes Science and Technology
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