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https://www.readbyqxmd.com/read/29775941/effects-of-arm-weight-on-gait-performance-in-healthy-subjects
#1
Hyung Suk Yang, C Roger James, Lee T Atkins, Steven F Sawyer, Phillip S Sizer, Neeraj A Kumar, Jongyeol Kim
Previous studies have investigated how additional arm weights affect gait. Although light weights (0.45 kg) seemed to elicit performance improvements in Parkinsonian patients, it was not studied how light weights affect gait parameters in healthy individuals. It is important to understand normal responses in a healthy population so that clinical effects might be better understood. Therefore, the purpose of this study was to investigate the effects of arm weights on arm swing amplitude, gait performance, and muscle activity in healthy people...
May 15, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29773349/robot-assisted-training-using-hybrid-assistive-limb%C3%A2-for-cerebral-palsy
#2
Mayumi Matsuda, Nobuaki Iwasaki, Yuki Mataki, Hirotaka Mutsuzaki, Kenichi Yoshikawa, Kazushi Takahashi, Keiko Enomoto, Kumiko Sano, Aoi Kubota, Tomohiro Nakayama, Junko Nakayama, Haruka Ohguro, Masafumi Mizukami, Kazuhide Tomita
PURPOSE: The Hybrid Assistive Limb® (HAL®, CYBERDYNE) is a wearable robot that provides assistance to a patient while they are walking, standing, and performing leg movements based on the wearer's intended movement. The effect of robot-assisted training using HAL® for cerebral palsy (CP) is unknown. Therefore, we assessed the effect of robot-assisted training using HAL® on patients with CP, and compared walking and gross motor abilities between pre-intervention and post-intervention...
May 14, 2018: Brain & Development
https://www.readbyqxmd.com/read/29771730/vagal-mediation-of-low-frequency-heart-rate-variability-during-slow-yogic-breathing
#3
Bryan W Kromenacker, Anna A Sanova, Frank I Marcus, John J B Allen, Richard D Lane
OBJECTIVE: Changes in heart rate variability (HRV) associated with breathing (respiratory sinus arrhythmia [RSA]) are known to be parasympathetically (vagally) mediated when the breathing rate is within the typical frequency range (9-24 breaths/min; high frequency HRV). Slow yogic breathing occurs at rates below this range and increases low frequency HRV power, which may additionally reflect a significant sympathetic component. Yogic breathing techniques are hypothesized to confer health benefits by increasing cardiac vagal control, but increases in low frequency HRV power cannot unambiguously distinguish sympathetic from parasympathetic contributions...
May 16, 2018: Psychosomatic Medicine
https://www.readbyqxmd.com/read/29769832/validity-and-reliability-of-the-powertap-p1-pedals-power-meter
#4
Jesús G Pallarés, José Ramón Lillo-Bevia
To validate the new PowerTap P1® pedals power meter (PP1), thirty-three cyclists performed 12 randomized and counterbalanced graded exercise tests (100-500 W), at 70, 85 and 100 rev·min-1 cadences, in seated and standing positions. A scientific SRM system and a pair of PP1 pedals continuously recorded cadence and power output data. Significantly lower power output values were detected for the PP1 compared to the SRM for all workloads, cadences, and pedalling conditions (2-10 W, p < 0.05), except for the workloads ranged between 150 W to 350 W at 70 rev·min-1 in seated position (p > 0...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29764466/validity-of-shoe-type-inertial-measurement-units-for-parkinson-s-disease-patients-during-treadmill-walking
#5
Myeounggon Lee, Changhong Youm, Jeanhong Jeon, Sang-Myung Cheon, Hwayoung Park
BACKGROUND: When examining participants with pathologies, a shoe-type inertial measurement unit (IMU) system with sensors mounted on both the left and right outsoles may be more useful for analysis and provide better stability for the sensor positions than previous methods using a single IMU sensor or attached to the lower back and a foot. However, there have been few validity analyses of shoe-type IMU systems versus reference systems for patients with Parkinson's disease (PD) walking continuously with a steady-state gait in a single direction...
May 15, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29752236/effect-of-the-synchronization-based-control-of-a-wearable-robot-having-a-non-exoskeletal-structure-on-the-hemiplegic-gait-of-stroke-patients
#6
Noriaki Mizukami, Shizue Takeuchi, Mikio Tetsuya, Atsushi Tsukahara, Kunihiro Yoshida, Akira Matsushima, Yoichi Maruyama, Kenji Tako, Minoru Hashimoto
We have been developing the robotic wear curara as both a welfare device and rehabilitation robot that assists the elderly and disabled. curara is aimed at user friendliness. We have, thus, chosen a non-exoskeleton structure made of a plastic so that the robot is as light in weight as possible and to minimize the restraining stress against natural human movement. We verified the assistance effect of curara on 15 hemiplegic patients with stroke by comparing gait parameters (i.e., velocity, step length, cadence, and symmetry of joint angles) among three conditions...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29750815/abnormal-gait-pattern-emerges-during-curved-trajectories-in-high-functioning-parkinsonian-patients-walking-in-line-at-normal-speed
#7
Anna Maria Turcato, Marco Godi, Marica Giardini, Ilaria Arcolin, Antonio Nardone, Andrea Giordano, Marco Schieppati
BACKGROUND: Several patients with Parkinson´s disease (PD) can walk normally along straight trajectories, and impairment in their stride length and cadence may not be easily discernible. Do obvious abnormalities occur in these high-functioning patients when more challenging trajectories are travelled, such as circular paths, which normally implicate a graded modulation in the duration of the interlimb gait cycle phases? METHODS: We compared a cohort of well-treated mildly to moderately affected PD patients to a group of age-matched healthy subjects (HS), by deliberately including HS spontaneously walking at the same speed of the patients with PD...
2018: PloS One
https://www.readbyqxmd.com/read/29746965/spine-and-lower-extremity-kinematics-during-gait-in-cervical-spondylotic-myelopathy-patients
#8
Ram Haddas, Sujal Patel, Raj Arakal, Akwasi Boah, Theodore Belanger, Kevin L Ju
BACKGROUND CONTEXT: CSM typically manifests with a slow, progressive stepwise decline in neurologic function, including hand clumsiness and balance difficulties. Gait disturbances are frequently seen in CSM patients, with more advanced cases exhibiting a stiff, spastic gait. PURPOSE: To evaluate the spatiotemporal parameters and spine and lower extremity kinematics during the gait cycle of adult cervical spondylotic myelopathy (CSM) patients prior to surgical intervention...
May 7, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29746480/properties-of-traditional-bamboo-carrying-poles-have-implications-for-user-interactions
#9
Ryan T Schroeder, James L Croft, Giang D Ngo, John E A Bertram
Compliant bamboo poles have long been used for load carriage in Asian cultures. Although this custom differs from Western conventions of rigid body attachments (e.g. backpack), potential benefits include reduced peak shoulder forces as well as metabolic transport cost savings. Evidence that carrying a flexible pole benefits locomotion remains mixed, perhaps in part because the properties of pole design (e.g. bamboo material, structural geometry, etc.) have largely been neglected. These properties influence vibrational forces and consequently, the energy required by the user to manage the oscillations...
2018: PloS One
https://www.readbyqxmd.com/read/29730490/increased-double-limb-support-times-during-walking-in-right-limb-dominant-healthy-older-adults-with-low-bone-density
#10
Paul S Sung
BACKGROUND: Older adults with low bone mineral density (BMD) may exhibit early markers for physical frailty; however, there is a lack of understanding of the dominant limb support patterns during walking. RESEARCH QUESTION: The purpose of this study was to investigate limb support times during walking in healthy older adults with low BMD. METHODS: Seventy-seven right limb dominant older adults (48 female subjects, 29 male subjects) participated in the study...
April 25, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29729611/accuracy-of-wearable-physical-activity-trackers-in-people-with-parkinson-s-disease
#11
Robyn M Lamont, Hannah L Daniel, Caitlyn L Payne, Sandra G Brauer
INTRODUCTION: The purpose of this study was to determine the accuracy of the Fitbit Charge HR™ and Garmin vívosmart® HR in measuring steps and reflecting intensity of activity in people with Parkinson's disease (PD). METHODS: Thirty-three people with mild-moderate PD performed six, two-minute indoor walks at their self-selected walking pace, and at target cadences of 60, 80, 100, 120 and 140 beats/min. A 500 m outdoor walk with terrain challenges was also performed...
April 24, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29727776/knee-adduction-moment-peak-and-impulse-do-not-change-during-the-first-six-months-of-walking-with-a-prosthesis
#12
Rebecca L Krupenevich, Ross H Miller, Brad D Hendershot, Barri L Schnall, Alison L Pruziner
BACKGROUND: Individuals with unilateral lower limb loss are at increased risk for developing knee osteoarthritis in their contralateral limb. The mechanisms underlying this phenomenon are unknown, but large or unusual loads on the limb are thought to contribute to osteoarthritis development. Yet, to our knowledge, there have been no longitudinal assessments of knee joint kinetics to assist with identifying the origin or progression of such loads. RESEARCH QUESTION: This study aimed to examine knee joint kinetics of individuals with lower limb loss as a function of time from independent ambulation...
April 26, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29723649/differential-associations-between-dual-task-walking-abilities-and-usual-gait-patterns-in-healthy-older-adults-results-from-the-baltimore-longitudinal-study-of-aging
#13
Seung-Uk Ko, Gerald J Jerome, Eleanor M Simonsick, Stephanie Studenski, Jeffrey M Hausdorff, Luigi Ferrucci
BACKGROUND: It is well established that facing a cognitive challenge while carrying out a motor task interferes with the motor task performance, and in general the ability of handling a dual-task declines progressively with aging. However, the reasons for this decline have not been fully elucidated. Understanding the association between usual-walking gait patterns and dual-task walking performance may provide new insights into the mechanisms that lead to gait deterioration in normal aging and its link to motor and cognitive function...
April 27, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29717946/immediate-effects-of-talus-stabilizing-taping-on-balance-and-gait-parameters-in-patients-with-chronic-stroke-a-cross-sectional-study
#14
Donghwan Park, Ji-Hyun Lee, Tae-Woo Kang, Heon-Seock Cynn
BACKGROUND: Talus-stabilizing taping (TST) may improve ankle range of motion and gait performance by providing a posterior-inferior talar glide in a closed-chain dorsiflexion position. OBJECTIVES: This study aimed to investigate the immediate effects of TST on balance and gait parameters in patients with chronic stroke. METHODS: Twenty post-stroke patients participated in this study. Each participant performed tests under three conditions (TST, barefoot, and conventional ankle-foot orthosis [AFO]), in random order...
May 2, 2018: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/29714066/effect-of-ankle-foot-orthoses-on-gait-balance-and-gross-motor-function-in-children-with-cerebral-palsy-a-systematic-review-and-meta-analysis
#15
Mael Lintanf, Jean-Sébastien Bourseul, Laetitia Houx, Mathieu Lempereur, Sylvain Brochard, Christelle Pons
OBJECTIVE: To determine the effects of ankle-foot orthoses (AFOs) on gait, balance, gross motor function and activities of daily living in children with cerebral palsy. DATA SOURCES: Five databases were searched (Pubmed, Psycinfo, Web of Science, Academic Search Premier and Cochrane Library) before January 2018. REVIEW METHODS: Studies of the effect of AFOs on gait, balance, gross motor function and activities of daily living in children with cerebral palsy were included...
April 1, 2018: Clinical Rehabilitation
https://www.readbyqxmd.com/read/29709717/nonlinear-analysis-is-the-most-suitable-method-to-detect-changes-in-heart-autonomic-control-after-exercise-of-different-durations
#16
Rogério Figueiredo, Rafael Pereira, Osmar Pinto Neto
This study aimed to compare the heart autonomic control (HAC) response during two time-limited physical workouts using linear and nonlinear methods. A total of 20 healthy volunteers performed two physical workouts lasting 5 (P5) and 10 min (P10). In both workouts, volunteers performed as many repetitions as possible within the time limit of sets of 10 repetitions of four different exercises in the order of pull-ups, push-ups, barbell power clean, and barbell shoulder to overhead press. Barbell exercises were performed using a load of 50% of each volunteer's personal record for the jerk lift...
April 16, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29702370/dual-task-interference-during-gait-on-irregular-terrain-in-people-with-parkinson-s-disease
#17
Hang Xu, Andrew Merryweather, K Bo Foreman, Jie Zhao, MaryEllen Hunt
BACKGROUND: Gait impairments in people with Parkinson's disease (PD) are accentuated in dual-task conditions. Most PD studies on dual-task gait have measured only straight line walking and treadmill gait. Gait alterations on irregular terrain are poorly understood. RESEARCH QUESTION: To what extent does walking on irregular terrain exacerbate dual-task interference in people with PD, compared to age-matched control participants? METHODS: Gait data were collected for nine participants with mild to moderate PD and nine healthy age-matched participants on regular and irregular terrains...
April 22, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29698430/dynamic-cortical-participation-during-bilateral-cyclical-ankle-movements-effects-of-parkinson-s-disease
#18
Takashi Yoshida, Kei Masani, Karl Zabjek, Milos R Popovic, Robert Chen
Parkinson's disease (PD) is known to increase asymmetry and variability of bilateral movements. However, the mechanisms of such abnormalities are not fully understood. Here, we aimed to investigate whether kinematic abnormalities are related to cortical participation during bilateral, cyclical ankle movements, which required i) maintenance of a specific frequency and ii) bilateral coordination of the lower limbs in an anti-phasic manner. We analyzed electroencephalographic and electromyographic signals from nine men with PD and nine aged-matched healthy men while they sat and cyclically dorsi- and plantarflexed their feet...
2018: PloS One
https://www.readbyqxmd.com/read/29696615/influence-of-cognitive-impairment-on-the-freezing-of-gait-in-non-demented-people-with-parkinson-s-disease
#19
J M Cancela, C M Nascimento, S Varela, M Seijo-Martinez, L Lorenzo-Lopez, J C Millan-Calenti, C Dominguez-Vivero, C Ayan
INTRODUCTION: Freezing of gait (FOG) is a motor disturbance usually appearing in advanced Parkinson's disease (PD). Cognitive and executive function seems to play an important role in this phenomenon. AIM: To investigate if cognitive and kinematic parameters correlate with FOG in PD patients without dementia. PATIENTS AND METHODS: We conducted an observational cross-sectional study. Participants were classified in two groups: freezers and non-freezers...
May 1, 2018: Revista de Neurologia
https://www.readbyqxmd.com/read/29688109/power-output-and-pacing-during-international-cross-country-mountain-bike-cycling
#20
Cyril Granier, Chris R Abbiss, Anaël Aubry, Yvon Vauchez, Sylvain Dorel, Christophe Hausswirth, Yann Le Meur
PURPOSE: To characterize the physiological profiles of elite cross-country mountain bike (XCO-MTB) cyclists, and to examine their pacing and power output (PO) distribution during international races. METHODS: Over two competitive seasons, eight elite male XCO-MTB cyclists (VO2 max: 79.9 ± 5.2 ml.min-1 .kg-1 , MAP: 411 ± 18 W and 6.3 ± 0.4 W.kg-1 ) regularly undertook incremental tests to assess their PO and heart rate (HR) at first and second ventilatory thresholds (VT1 and VT2) and at VO2max ...
April 24, 2018: International Journal of Sports Physiology and Performance
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