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https://www.readbyqxmd.com/read/28632052/motor-unit-firing-frequency-of-lower-limb-muscles-during-an-incremental-slide-board-skating-test
#1
Tatiane Piucco, Rodrigo Bini, Masanori Sakaguchi, Fernando Diefenthaeler, Darren Stefanyshyn
This study investigated how the combination of workload and fatigue affected the frequency components of muscle activation and possible recruitment priority of motor units during skating to exhaustion. Ten male competitive speed skaters performed an incremental maximal test on a slide board. Activation of six muscles from the right leg was recorded throughout the test. A time-frequency analysis was performed to compute overall, high, and low frequency bands from the whole signal at 10, 40, 70, and 90% of total test time...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28627217/using-plantar-electrical-stimulation-to-improve-postural-balance-and-plantar-sensation-among-patients-with-diabetic-peripheral-neuropathy
#2
Bijan Najafi, Talal K Talal, Gurtej Singh Grewal, Robert Menzies, David G Armstrong, Lawrence A Lavery
OBJECTIVE: People with diabetic peripheral neuropathy (DPN) often exhibit deteriorations in motor-performance mainly due to lack of plantar-sensation. The study explored effectiveness of plantar electrical-stimulation therapy to enhance motor-performance among people with DPN. DESIGN AND METHODS: Using a double-blinded model, 28 volunteers with DPN (age: 57.8 ± 10.2 years) were recruited and randomized to either intervention (IG: n = 17) or control (CG: n = 11) group...
February 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28609196/horizontal-ground-reaction-forces-to-stationary-running-performed-in-the-water-and-on-dry-land-at-different-physiological-intensities
#3
Cristine Lima Alberton, Stephanie Santana Pinto, Gabriela Neves Nunes, Douglas Guerreiro Dos Santos Rau, Paula Finatto, Amanda Haberland Antunes, Marcus Peikriszwili Tartaruga, Marco Bergamin, Eduardo Lusa Cadore, Luiz Fernando Martins Kruel
The aim of the present study was to compare the peak anterior-posterior (Fy) and medio-lateral (Fx) ground reaction forces (GRFs) of women performing stationary running at different intensities in aquatic and dry land environments. Fourteen young women performed the stationary running exercise at three cadences (first ventilatory threshold, second ventilatory threshold and maximum effort, as determined during exercise in water) in aquatic and dry land environments. Two-way repeated measures ANOVA was used to analyse the data (α = ...
June 13, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28606769/computer-assisted-cognitive-rehabilitation-on-freezing-of-gait-in-parkinson-s-disease-a-pilot-study
#4
Valeria Dibilio, Alessandra Nicoletti, Giovanni Mostile, Giacomo Portaro, Antonina Luca, Francesco Patti, Mario Zappia
BACKGROUND: In Parkinson's Disease (PD), effects of a cognitive training have been systematically evaluated only for cognitive and behavioral outcome measures, with mild to moderate effects. Despite the demonstrated interplay between cognition and gait, no studies have investigated the effect of cognitive rehabilitation protocols on gait in PD. METHODS: Patients affected by PD with freezing of gait were treated twice a week for six weeks with one hour sessions of computer-assisted training of attention ability and information processing tasks...
June 9, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28603353/the-association-between-the-maximum-step-length-test-and-the-walking-efficiency-in-children-with-cerebral-palsy
#5
Minoru Kimoto, Kyoji Okada, Hitoshi Sakamoto, Takanori Kondou
[Purpose] To improve walking efficiency could be useful for reducing fatigue and extending possible period of walking in children with cerebral palsy (CP). For this purpose, current study compared conventional parameters of gross motor performance, step length, and cadence in the evaluation of walking efficiency in children with CP. [Subjects and Methods] Thirty-one children with CP (21 boys, 10 girls; mean age, 12.3 ± 2.7 years) participated. Parameters of gross motor performance, including the maximum step length (MSL), maximum side step length, step number, lateral step up number, and single leg standing time, were measured in both dominant and non-dominant sides...
May 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28595596/the-influence-of-dog-ownership-on-objective-measures-of-free-living-physical-activity-and-sedentary-behaviour-in-community-dwelling-older-adults-a-longitudinal-case-controlled-study
#6
Philippa Margaret Dall, Sarah Lesley Helen Ellis, Brian Martin Ellis, P Margaret Grant, Alison Colyer, Nancy Renee Gee, Malcolm Howard Granat, Daniel Simon Mills
BACKGROUND: There is some evidence to suggest that dog ownership may improve physical activity (PA) among older adults, but to date, studies examining this, have either depended on self-report or incomplete datasets due to the type of activity monitor used to record physical activity. Additionally, the effect of dog ownership on sedentary behaviour (SB) has not been explored. The aim of the current study was to address these issues by using activPAL monitors to evaluate the influence of dog ownership on health enhancing PA and SB in a longitudinal study of independently-mobile, community-dwelling older adults...
June 9, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28584338/first-signs-of-elderly-gait-for-women
#7
Katarzyna Kaczmarczyk, Ida Wiszomirska, Michalina Błażkiewicz, Michał Wychowański, Andrzej Wit
BACKGROUND: The aims of this study have been twofold: to attempt to reduce the number of spatiotemporal parameters used for describing gait through the factor analysis and component analysis; and to explore the critical age of decline for other gait parameters for healthy women. MATERIAL AND METHODS: A total of 106 women (aged ≥ 40 years old (N = 76) and ≤ 31 years old (N = 30)) were evaluated using a pressure-sensitive mat (Zebris Medical System, Tübingen, Germany) for collecting spatiotemporal gait parameters...
May 22, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28582895/implementation-of-integrated-circuit-and-design-of-sar-adc-for-fully-implantable-hearing-aids
#8
Jong Hoon Kim, Jyung Hyun Lee, Jin-Ho Cho
BACKGOUND: The hearing impaired population has been increasing; many people suffer from hearing problems. To deal with this difficulty, various types of hearing aids are being rapidly developed. In particular, fully implantable hearing aids are being actively studied to improve the performance of existing hearing aids and to reduce the stigma of hearing loss patients. It has to be of small size and low-power consumption for easy implantation and long-term use. OBJECTIVE: The objective of the study was to implement a small size and low-power consumption successive approximation register analog-to-digital converter (SAR ADC) for fully implantable hearing aids...
May 19, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28578137/a-pilot-study-of-physical-activity-and-sedentary-behavior-distribution-patterns-in-older-women
#9
Emma Fortune, Benjamin Mundell, Shreyasee Amin, Kenton Kaufman
The study aims were to investigate free-living physical activity and sedentary behavior distribution patterns in a group of older women, and assess the cross-sectional associations with body mass index (BMI). Eleven older women (mean (SD) age: 77 (9) yrs) wore custom-built activity monitors, each containing a tri-axial accelerometer (±16g, 100Hz), on the waist and ankle for lab-based walking trials and 4 days in free-living. Daily active time, step counts, cadence, and sedentary break number were estimated from acceleration data...
May 16, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28570495/power-profiles-of-competitive-and-non-competitive-mountain-bikers
#10
Andrew R Novak, Kyle J M Bennett, Matthew A Pluss, Job Fransen, Mark L Watsford, Ben J Dascombe
The performance of Olympic distance cross-country mountain bikers (XCO-MTB) is affected by constraints such as erosion of track surfaces and mass start congestion which can affect race results. Standardised laboratory assessments quantify inter-seasonal and intra-seasonal cycling potential through the assessment of multiple physiological capacities. Therefore, this study examined whether the power profile assessment could discriminate between competitive XCO-MTB and non-competitive mountain bikers (NC-MTB)...
May 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28566544/polyneuropathy-relates-to-impairment-in-daily-activities-worse-gait-and-fall-related-injuries
#11
Rens Hanewinckel, Judith Drenthen, Vincentius J A Verlinden, Sirwan K L Darweesh, Jos N van der Geest, Albert Hofman, Pieter A van Doorn, M Arfan Ikram
OBJECTIVE: To extensively investigate the association of chronic polyneuropathy with basic and instrumental activities of daily living (BADL and IADL), falls, and gait. METHODS: A total of 1,445 participants of the population-based Rotterdam Study (mean age 71 years, 54% women) underwent a polyneuropathy screening involving a symptom questionnaire, neurologic examination, and nerve conduction studies. Screening yielded 4 groups: no, possible, probable, and definite polyneuropathy...
May 31, 2017: Neurology
https://www.readbyqxmd.com/read/28561903/arcuate-nucleus-neuropeptide-coexpression-and-connections-to-gonadotropin-releasing-hormone-neurons-in-the-female-rhesus-macaque
#12
Cadence True, Diana Takahashi, Melissa Kirigiti, Sarah Rene Lindsley, Cloe Moctezuma, Anam Arik, M Susan Smith, Paul Kievit, Kevin L Grove
The underlying hypothalamic neurocircuitry by which metabolism and feeding regulates reproductive function has been well-studied in the rodent; however, recent data demonstrated significant neuroanatomical differences in the human brain. The current study had three objectives, centered on arcuate nucleus neuropeptides regulating feeding and reproduction: 1) characterize coexpression patterns in the female nonhuman primate, 2) establish whether these neuronal populations make potential contacts with GnRH neurons and 3) determine whether these contacts differ between the low and high GnRH-releasing states of pre-puberty and adulthood, respectively...
May 31, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28558835/a-muscle-driven-approach-to-restore-stepping-with-an-exoskeleton-for-individuals-with-paraplegia
#13
Sarah R Chang, Mark J Nandor, Lu Li, Rudi Kobetic, Kevin M Foglyano, John R Schnellenberger, Musa L Audu, Gilles Pinault, Roger D Quinn, Ronald J Triolo
BACKGROUND: Functional neuromuscular stimulation, lower limb orthosis, powered lower limb exoskeleton, and hybrid neuroprosthesis (HNP) technologies can restore stepping in individuals with paraplegia due to spinal cord injury (SCI). However, a self-contained muscle-driven controllable exoskeleton approach based on an implanted neural stimulator to restore walking has not been previously demonstrated, which could potentially result in system use outside the laboratory and viable for long term use or clinical testing...
May 30, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28552031/the-hybrid-assistive-limb%C3%A2-intervention-for-a-postoperative-patient-with-spinal-dural-arteriovenous-fistula-and-chronic-spinal-cord-injury-a-case-study
#14
Yukiyo Shimizu, Kei Nakai, Hideki Kadone, Shunsuke Yamauchi, Shigeki Kubota, Tomoyuki Ueno, Aiki Marushima, Kayo Hiruta, Ayumu Endo, Hiroaki Kawamoto, Akira Matsumura, Yoshiyuki Sankai, Yasushi Hada, Masashi Yamazaki
CONTEXT: The purpose of this report was to describe the improvement in walking ability using the Hybrid Assistive Limb® (HAL®) intervention in the case of a patient with paraplegia after spinal cord injury whose condition deteriorated because of a spinal dural arteriovenous fistula (SDAVF). FINDINGS: A 48-year-old man started the HAL® intervention twice per week (total 10 sessions), after his neurologic improvement had plateaued from 3 to 6 months postoperatively for an SDAVF...
May 29, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28551465/spinal-fusion-limits-upper-body-range-of-motion-during-gait-without-inducing-compensatory-mechanisms-in-adolescent-idiopathic-scoliosis-patients
#15
R M Holewijn, I Kingma, M de Kleuver, J J P Schimmel, N L W Keijsers
INTRODUCTION: Previous studies show a limited alteration of gait at normal walking speed after spinal fusion surgery for adolescent idiopathic scoliosis (AIS), despite the presumed essential role of spinal mobility during gait. This study analyses how spinal fusion affects gait at more challenging walking speeds. More specifically, we investigated whether thoracic-pelvic rotations are reduced to a larger extent at higher gait speeds and whether compensatory mechanisms above and below the stiffened spine are present...
May 17, 2017: Gait & Posture
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
#16
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/28539149/mobility-and-agility-during-locomotion-in-the-mark-iii-space-suit
#17
Conor R Cullinane, Richard A Rhodes, Leia A Stirling
INTRODUCTION: The Mark III (MIII) space suit assembly (SSAs) implements a multibearing, hard-material hip brief assembly (HBA). We hypothesize that: 1) the MIII HBA restricts operator mobility and agility which manifests in effects to gait parameters; 2) the waist bearing provides rotational motion, partially alleviating the restrictions; and 3) there are resistive, speed-dependent torques associated with the spinning bearings which further diminish mobility and agility. METHODS: A subject (Suited and Unsuited) performed two planetary tasks-walking forward (WF) and backward (WB)...
June 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28536533/heart-rate-fragmentation-a-new-approach-to-the-analysis-of-cardiac-interbeat-interval-dynamics
#18
Madalena D Costa, Roger B Davis, Ary L Goldberger
Background: Short-term heart rate variability (HRV) is most commonly attributed to physiologic vagal tone modulation. However, with aging and cardiovascular disease, the emergence of high short-term HRV, consistent with the breakdown of the neuroautonomic-electrophysiologic control system, may confound traditional HRV analysis. An apparent dynamical signature of such anomalous short-term HRV is frequent changes in heart rate acceleration sign, defined here as heart rate fragmentation. Objective: The aims were to: (1) introduce a set of metrics designed to probe the degree of sinus rhythm fragmentation; (2) test the hypothesis that the degree of fragmentation of heartbeat time series increases with the participants' age in a group of healthy subjects; (3) test the hypothesis that the heartbeat time series from patients with advanced coronary artery disease (CAD) are more fragmented than those from healthy subjects; and (4) compare the performance of the new fragmentation metrics with standard time and frequency domain measures of short-term HRV...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28533617/estimated-lower-speed-boundary-at-which-the-walk-ratio-constancy-is-broken-in-healthy-adults
#19
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/28533609/gait-abnormalities-in-patients-with-chronic-ankle-instability-can-improve-following-a-non-invasive-biomechanical-therapy-a-retrospective-analysis
#20
Shay Tenenbaum, Ofir Chechik, Jason Bariteau, Nathan Bruck, Yiftah Beer, Mazen Falah, Ganit Segal, Amit Mor, Avi Elbaz
[Purpose] The purpose of this study was to evaluate the changes in gait patterns and clinical outcomes of patients with chronic ankle instability (CAI) following treatment with a home-based non-invasive biomechanical device. [Subjects and Methods] Thirty-three patients with CAI were compared with 43 healthy controls. Patients underwent a spatiotemporal gait assessment before and three months following treatment. Clinical evaluation was recorded with SF-36 Health Survey and the Foot and Ankle Outcome Score (FAOS)...
April 2017: Journal of Physical Therapy Science
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