Read by QxMD icon Read


Salil Apte, Michiel Plooij, Heike Vallery
BACKGROUND: Body weight support (BWS) systems have shown promise as rehabilitation tools for neurologically impaired individuals. This paper reviews the experiment-based research on BWS systems with the aim: (1) To investigate the influence of body weight unloading (BWU) on gait characteristics; (2) To study whether the effects of BWS differ between treadmill and overground walking and (3) To investigate if modulated BWU influences gait characteristics less than unmodulated BWU. METHOD: A systematic literature search was conducted in the following search engines: Pubmed, Scopus, Web of Science and Google Scholar...
June 20, 2018: Journal of Neuroengineering and Rehabilitation
Hayato Ohnuma, Masanobu Tachi, Akihito Kumano, Yuichi Hirano
This study aims to clarify the ideal technique for running on a curved path during sprinting events. Participants were twelve male track and field athletes including long jumpers and sprinters. The participants performed a 60-m sprint with maximal effort on straight and curved paths. Participants were divided into "good curve runners" and "poor curve runners" according to the curved path running speed relative to that of the straight path. Kinematic variables and ground reaction forces (GRFs) were registered and compared between the groups and paths...
June 2018: Journal of Human Kinetics
Erfan Shahabpoor, Aleksandar Pavic
Continuous monitoring of natural human gait in real-life environments is essential in many applications including disease monitoring, rehabilitation, and professional sports. Wearable inertial measurement units are successfully used to measure body kinematics in real-life environments and to estimate total walking ground reaction forces GRF(t) using equations of motion. However, for inverse dynamics and clinical gait analysis, the GRF(t) of each foot is required separately. Using an experimental dataset of 1243 tri-axial separate-foot GRF(t) time histories measured by the authors across eight years, this study proposes the 'Twin Polynomial Method' (TPM) to estimate the tri-axial left and right foot GRF(t) signals from the total GRF(t) signals...
June 19, 2018: Sensors
Francesco Esposito, Marco Freddolini, Massimiliano Marcucci, Leonardo Latella, Andrea Corvi
BACKGROUND: Crutch use is prescribed early in the rehabilitation process following total hip replacement (THR) surgery to improve safety and promote return to active living. RESEARCH QUESTION: Purpose of this study was to understand mid-term effects of crutch length setup on quiet standing and walking two months post-op when crutch use was no longer required. METHODS: Thirty patients were evaluated 2 months post-surgery when they had been walking without crutch for a month...
June 5, 2018: Gait & Posture
Jennifer M Neugebauer, Michael LaFiandra
INTRODUCTION: Ground reaction forces (GRFs) during load carriage differ from unloaded walking. Methods to quantify peak vertical GRF (pGRFvert) of Soldiers walking with loads outside of a laboratory are needed in order to study GRFs during operationally relevant tasks. PURPOSE: Develop a statistically based model to predict pGRFvert during loaded walking from ActiGraph GT3X+ activity monitor (AM) vertical acceleration. METHODS: 15 male Soldiers (25...
June 8, 2018: Medicine and Science in Sports and Exercise
Ram Haddas, Kevin L Ju
STUDY DESIGN: Prospective cohort study OBJECTIVE.: Analyze ground reaction force (GRF) parameters in cervical spondylotic myelopathy (CSM) patients to elucidate gait alterations as compared to healthy controls. SUMMARY OF BACKGROUND DATA: During the human gait cycle, the magnitude and direction of the force each foot imparts on the ground varies in a controlled fashion to propel the body's center of mass forward. Alterations in GRF patterns can both point to subtle gait disturbances and explain altered gait patterns such as that seen in CSM...
June 8, 2018: Spine
Frank Berenpas, Sven Schiemanck, Anita Beelen, Frans Nollet, Vivian Weerdesteyn, Alexander Geurts
BACKGROUND: Contralesional 'drop foot' after stroke is usually treated with an ankle-foot orthosis (AFO). However, AFOs may hamper ankle motion during stance. Peroneal functional electrical stimulation (FES) is an alternative treatment that provides active dorsiflexion and allows normal ankle motion. Despite this theoretical advantage of FES, the kinematic and kinetic differences between AFO and FES have been scarcely investigated. OBJECTIVE: To test whether walking with implanted FES leads to improvements in stance stability, propulsion, and swing initiation compared to AFO...
June 6, 2018: Restorative Neurology and Neuroscience
Yixue Luo, Chenyu Luo, Yuhui Cai, Tianyun Jiang, Tianhong Chen, Wenyue Xiao, Junchao Guo, Yubo Fan
The different mechanical stimulus affects the bone mass and bone strength. The aim of this study was to investigate the effect of landing posture of the hoopster and paratrooper on the bone mass. In this study, 39 male participants were recruited including 13 paratroopers, 13 hoopsters, and 13 common students (control groups). Bone area (BA), BMD and BMC of calcaneus, and 1-5th of the metatarsus, hip, and lumbar spine (L1 -L4 ) were measured by the dual-energy X-ray absorptiometry. Also, the vertical ground reaction forces (GRFs) of hoopsters and paratroopers were measured by the landing of 1...
2018: Journal of Healthcare Engineering
Erfan Shahabpoor, Aleksandar Pavic, James M W Brownjohn, Stephen A Billings, Ling-Zhong Guo, Mateusz Bocian
Monitoring natural human gait in real-life environment is essential in many applications including the quantification of disease progression, and monitoring the effects of treatment and alteration of performance biomarkers in professional sports. Nevertheless, reliable and practical techniques and technologies necessary for continuous real-life monitoring of gait is still not available. This paper explores in detail the correlations between the acceleration of different body segments and walking ground reaction forces GRF(t) in three dimensions and proposes three sensory systems, with one, two, and three inertial measurement units (IMUs), to estimate GRF(t) in the vertical (V), medial-lateral (ML), and anterior-posterior (AP) directions...
June 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
AmirAli Jafarnezhadgero, Morteza Madadi Shad, Mahdi Majlesi, Matteo Zago
OBJECTIVE: Therapeutic lateral knee joint muscle taping potentially offers a low-risk, economical and effective alternative for the clinical treatment of light to moderate knee overload, due to misalignment in patients with genu varum. In this study, we aimed at investigating the immediate effect of lateral knee joint muscular kinesio taping on lower limb joint powers, during the stance phase of walking, in individuals with genu varum. METHODS: Fifteen male subjects with genu varum misalignment (age: 24...
April 2018: Journal of Bodywork and Movement Therapies
Gabriel Gijon-Nogueron, Inmaculada Palomo-Toucedo, Alejandro Gil-Tinoco, Ana Belen Ortega-Avila, Pedro Vicente Munuera-Martínez
BACKGROUND: The aim of this study is to explore the changes in ground reaction force (GRF) produced by custom-made weight-bearing and nonweight-bearing foot orthoses and by a prefabricated foot orthosis, in the control of the pronated foot. METHODS: Thirty-nine participants were recruited. All were in good health, aged 18 to 25 years, and presented pronated foot. Three different types of foot orthosis were studied: prefabricated, weight-bearing, and nonweight-bearing...
June 2018: Medicine (Baltimore)
Qing Chao, Zhi-Fang Gao, Dong Zhang, Biligen-Gaowa Zhao, Feng-Qin Dong, Chun-Xiang Fu, Li-Jun Liu, Bai-Chen Wang
The Populus shoot undergoes primary growth (longitudinal growth) followed by secondary growth (radial growth), which produces biomass that is an important source of energy worldwide. We adopted joint PacBio Iso-Seq and RNA-seq analysis to identify differentially expressed transcripts along a developmental gradient from the shoot apex to the fifth internode of Populus Nanlin895. We obtained 87,150 full-length transcripts, including 2,081 new isoforms and 62,058 new alternatively spliced isoforms, most of which were produced by intron retention, that were used to update the Populus annotation...
May 31, 2018: Plant Biotechnology Journal
Michal Ostaszewski, Jolanta Pauk
BACKGROUND: Gait analysis is a useful tool medical staff use to support clinical decision making. There is still an urgent need to develop low-cost and unobtrusive mobile health monitoring systems. OBJECTIVE: The goal of this study was twofold. Firstly, a wearable sensor system composed of plantar pressure insoles and wearable sensors for joint angle measurement was developed. Secondly, the accuracy of the system in the measurement of ground reaction forces and joint moments was examined...
May 16, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
Wolfgang Seiberl, Elisabeth Jensen, Josephine Merker, Marco Leitel, Ansgar Schwirtz
Force plates represent the "gold standard" in measuring running kinetics to predict performance or to identify the sources of running-related injuries. As these measurements are generally limited to laboratory analyses, wireless high-quality sensors for measuring in the field are needed. This work analysed the accuracy and precision of a new wireless insole forcesensor for quantifying running-related kinetic parameters. Vertical ground reaction force (GRF) was simultaneously measured with pit-mounted force plates (1 kHz) and loadsol® sensors (100 Hz) under unshod forefoot and rearfoot running-step conditions...
May 29, 2018: European Journal of Sport Science
Valéria Maria de Azeredo Passos, Roberto Marini Ladeira, Cláudia Caciquinho Vieira de Souza, Itamar de Souza Santos, Sandhi Maria Barreto
INTRODUCTION: The aging of the population may lead to an increased prevalence of dementia and chronic kidney disease (CKD) and their overlap. OBJECTIVE: We investigated the association between CKD and cognitive performance among Brazilian adults (35-74 years). METHODS: Baseline data analysis of the Longitudinal Study of Adults (ELSA-Brasil), a multicenter cohort comprising 15,105 civil servants, was performed. Kidney function was defined by the CKD-Epi-estimated GRF and albumin creatinin ratio (ACR)...
January 2018: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
Derek Yocum, Joshua T Weinhandl, Jeffrey T Fairbrother, Songning Zhang
PURPOSE: An increased likelihood of developing obesity-related knee osteoarthritis may be associated with increased peak internal knee abduction moments (KAbM). Increases in step width (SW) may act to reduce this moment. The purpose of this study was to determine the effects of increased SW on knee biomechanics during stair negotiation of healthy-weight and obese participants. METHODS: Participants (24: 10 obese and 14 healthy-weight) used stairs and walked over level ground while walking at their preferred speed in two different SW conditions - preferred and wide (200% preferred)...
May 15, 2018: Journal of Biomechanics
Samuel J Callaghan, Robert G Lockie, Warren A Andrews, Robert F Chipchase, Sophia Nimphius
This study assessed the reliability and validity of segment measured accelerations in comparison to front foot contact (FFC) ground reaction force (GRF) during the delivery stride for cricket pace bowlers. Eleven recreational bowlers completed a 30-delivery bowling spell. Trunk- and tibia-mounted inertial measurement units (IMUs) were used to measure accelerations, converted to force, for comparisons to force plate GRF discrete measures. These measures included peak force, impulse and the continuous force-time curve in the vertical and braking (horizontal) planes...
May 16, 2018: Sports Biomechanics
Moon-Seok Kwon, Yu-Ri Kwon, Yang-Sun Park, Ji-Won Kim
Gait is associated with an important risk factor of falls in the elderly. It is important to find differences of quantitative gait variables between fallers and non-fallers. The aim of this study was to investigate gait patterns in elderly fallers and non-fallers. Thirty-eight fallers and 38 non-fallers of similar age and height participated in this study. Subjects walked across the GaitRite walkway at self-selected comfortable speeds. Spatio-temporal gait variables were measured to characterize gait patterns...
April 27, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
Alicja Rutkowska-Kucharska, Mateusz Kowal, Sławomir Winiarski
Many studies have shown that unilateral transfemoral amputation involves asymmetric gait. Transfemoral amputation leads to muscle atrophy in a tight stump resulting in asymmetry in muscle torque between the amputated and intact limb. This research is aimed at verifying if a relationship between torque values of hip joint flexors and extensors and gait asymmetry in patients with TFA exists. Fourteen adult subjects with unilateral TFA took part in the experiment. Gait symmetry was evaluated based on the ground reaction force (GRF)...
2018: Applied Bionics and Biomechanics
Paul S Sung
Understanding plantar pressure changes is an important component of the functional evaluation of subjects with flat foot. However, the altered postural control determined by the threshold from the vertical ground reaction force (GRF) requires clarification. The purpose of our study was to investigate the various GRF thresholds in subjects with and without flat foot during 1-leg standing. We included 34 control subjects and 30 subjects with flat foot in the present study. They performed the 1-leg standing test for 30 seconds, with the contralateral hip and knee flexed approximately 90°...
May 7, 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"