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Suzy L Wong
BACKGROUND: Grip strength is a measure of overall muscular strength and has been associated with disability, morbidity and mortality. Normative data are used to interpret an individual's grip strength measurements, but Canadian reference values are not available for a wide age range. DATA AND METHODS: The data pertain to 11,108 respondents aged 6 to 79 to the 2007-to-2013 Canadian Health Measures Survey, whose right-hand and left-hand grip strength were measured with a handgrip dynamometer...
October 19, 2016: Health Reports
Tingting Yue, Fahe Chai, Jingnan Hu, Ming Jia, Xiaofeng Bao, Zhenhua Li, Liqang He, Lei Zu
The natural gas vehicle market is rapidly developing throughout the world, and the majority of such vehicles operate on compressed natural gas (CNG). However, most studies on the emission characteristics of CNG vehicles rely on laboratory chassis dynamometer measurements, which do not accurately represent actual road driving conditions. To further investigate the emission characteristics of CNG vehicles, two CNG city buses and two CNG coaches were tested on public urban roads and highway sections. Our results show that when speeds of 0-10km/hr were increased to 10-20km/hr, the CO2, CO, nitrogen oxide (NOx), and total hydrocarbon (THC) emission factors decreased by (71...
October 2016: Journal of Environmental Sciences (China)
Yoshihiro Nakashima, Yoshizumi Kajii
Nitrous acid (HONO) is a well-known source of hydroxyl radicals in the troposphere. Vehicle exhaust is considered to be one of the primary emission sources of HONO. In this study, measurements of HONO in gasoline vehicle exhaust were carried out using a chassis dynamometer combined with incoherent broadband cavity-enhanced absorption spectroscopy. When catalysts were warm, concentrations of HONO were higher than those prior to catalysts warming. Other species, such as CO, and total hydrocarbons (THCs), showed the opposite pattern...
October 12, 2016: Science of the Total Environment
Caroline C Meadows, Philip A Gable, Keith R Lohse, Matthew W Miller
The present study explored the relationship between motor-preparatory electroencephalographic (EEG) activity, motivation, and motor performance (specifically premotor reaction time [RT]). Participants performed a RT task by squeezing a hand dynamometer in response to an auditory "go" signal. We recorded EEG and electromyography to index beta-suppression and premotor RT, respectively. Participants' motivation on each trial was modulated by offering monetary incentives at different magnitudes. Mixed-effect linear regression models showed that monetary incentive predicted premotor RT when controlling for beta-suppression, and beta-suppression independently predicted premotor RT...
October 12, 2016: Neuroscience
Mattie F Wolf, Roshan P George, Barry Warshaw, Elizabeth Wang, Larry A Greenbaum
OBJECTIVES: To quantify physical activity and grip strength in pediatric kidney transplant recipients and describe attitudes about exercise and exercise counseling given concerns about allograft injury. STUDY DESIGN: This was a cross-sectional analysis of 101 kidney transplant recipients (7-21 years old) >6 months post-transplant. Patients completed the Physical Activity Questionnaire (PAQ). Grip strength was measured with a dynamometer. We asked about activity limitations and provider counseling...
October 11, 2016: Journal of Pediatrics
Timothy G Baumer, Derek Chan, Veronica Mende, Jack Dischler, Roger Zauel, Marnix van Holsbeeck, Daniel S Siegal, George Divine, Vasilios Moutzouros, Michael J Bey
BACKGROUND: Physical therapy (PT) is often prescribed for patients with rotator cuff tears. The extent to which PT influences strength, range of motion (ROM), and patient-reported outcomes has been studied extensively, but the effect of PT on in vivo joint kinematics is not well understood. PURPOSE: To assess the influence of symptomatic rotator cuff pathology and the effects of PT on shoulder motion, strength, and patient-reported outcomes. STUDY DESIGN: Controlled laboratory study...
September 2016: Orthopaedic Journal of Sports Medicine
Derek Johnson, Robert Heltzel, Andrew Nix, Rebekah Barrow
Implications Development of representative, engine dynamometer test-cycles, from in-use activity data, is crucial in understanding fuel efficiency and emissions for engine operating modes that are different from cycles mandated by the Code of Federal Regulations. Representative cycles were created for the prime movers of unconventional well development - OTR trucks, drilling and hydraulic fracturing engines. The representative cycles are implemented on scaled engines to reduce fuel consumption during research and development of new technologies in controlled laboratory environments...
October 10, 2016: Journal of the Air & Waste Management Association
Robinson Ramírez-Vélez, Alejandra Tordecilla-Sanders, Jorge Enrique Correa-Bautista, Mark D Peterson, Antonio Garcia-Hermoso
OBJECTIVE: To evaluate the association between handgrip strength and ideal cardiovascular health (CVH) in Colombian children and adolescents. STUDY DESIGN: During the 2014-2015 school years, we examined a cross-sectional component of the FUPRECOL (Association for Muscular Strength with Early Manifestation of Cardiovascular Disease Risk Factors among Colombian Children and Adolescents) study. Participants included 1199 (n = 627 boys) youths from Bogota (Colombia)...
October 5, 2016: Journal of Pediatrics
Nadia Steiber
Handgrip strength is an important biomarker of healthy ageing and a powerful predictor of future morbidity and mortality both in younger and older populations. Therefore, the measurement of handgrip strength is increasingly used as a simple but efficient screening tool for health vulnerability. This study presents normative reference values for handgrip strength in Germany for use in research and clinical practice. It is the first study to provide normative data across the life course that is stratified by sex, age, and body height...
2016: PloS One
Cassie Wilson, Oliver J Perkin, Miranda P McGuigan, Keith A Stokes
The aim of this study was to determine the effect of aging on power generation and joint coordination during a leg press, in order to increase understanding of how functional movements are affected during the aging process. 44 older and 24 younger adults performed eight sub-maximal power repetitions on a seated leg press dynamometer. Peak power and velocity (at 40% maximum resistance) were measured along with the coordination (coupling angle) of the lower limb joints using the vector coding technique. The younger adults produced significantly greater peak power than the older adults (mean ± SD; 762 W ± 245 vs 361 W ± 162, p < 0...
2016: PloS One
Corinne E Wee, Tyler D Ames, Khoi M Le, Tiffany Wang, Laura S Phieffer, Carmen E Quatman
Fragility fractures, or fractures occurring from a low-trauma event, are extremely prevalent among the elderly population worldwide and associated with significant mortality and morbidity. This study evaluated the relationship between FES-I Fear of Falling Survey results, self-reported activity restrictions via the SF-36 survey, and scores recorded by portable, inexpensive clinical assessment tools (CATs) during dynamic functional tasks. Low scores during these tasks may indicate functional deficits that put patients at risk for falls and subsequent fragility fractures...
October 2016: Aging and Disease
Louise M Fuller, Brenda Button, Ben Tarrant, Ranjana Steward, Lisa Bennett, Greg Snell, Anne E Holland
OBJECTIVE: This study aimed to investigate the effects of a supervised longer (14 week) versus shorter duration, (7 week) rehabilitation program after lung transplantation (LTX). DESIGN: Randomised controlled trial SETTING: Post lung transplantation patients were randomised to either a shorter rehabilitation program (7 weeks) or a longer program (14 weeks) in an outpatient rehabilitation gym setting. PARTICIPANTS: Post lung transplantation patients aged 18 years or older who had undergone either single (SLTX) or bilateral lung (BSLTX) transplantation...
September 30, 2016: Archives of Physical Medicine and Rehabilitation
Matthew D Mucha, Wade Caldwell, Emily L Schlueter, Carly Walters, Amy Hassen
OBJECTIVES: Determine the association between hip abduction strength and lower extremity running related injury in distance runners. DESIGN: Systematic review. METHODS: Prospective longitudinal and cross sectional studies that quantified hip abduction strength and provided diagnosis of running related injury in distance runners were included and assessed for quality. Effect size was calculated for between group differences in hip abduction strength...
September 20, 2016: Journal of Science and Medicine in Sport
Nela V Ilić, Emilija Dubljanin-Raspopović, Una Nedeljković, Sanja Tomanović-Vujadinović, Sladjan D Milanović, Ivana Petronić-Marković, Tihomir V Ilić
BACKGROUND: A growing body of evidence supports the effectiveness of using transcranial direct current stimulation (tDCS) in patients with chronic hand motor impairment resulting from stroke. OBJECTIVE: In this study, we investigate and compare the combined effects of anodal tDCS and occupational therapy (OT) to sham stimulation with OT (control) on fine motor skill deficits of chronic stroke patients. METHODS: A total of 26 stroke patients (at ≥ 9 months) were randomly assigned to an active treatment or a control group in a double-blinded, sham-controlled, parallel design study...
September 29, 2016: Restorative Neurology and Neuroscience
Maude Dulac, Guy El Hajj Boutros, Charlotte Pion, Sébastien Barbat-Artigas, Gilles Gouspillou, Mylène Aubertin-Leheudre
Objective: To investigate whether handgrip strength normalized to body weight could be a useful clinical tool to identify dynapenia and assess functional capacity in post-menopausal women. Method: A total of 136 postmenopausal women were recruited. Body composition (Dual Energy X-ray Absorptiometry [DEXA], Bio-electrical Impedence Analysis [BIA]), grip strength (dynamometer) and functional capacity (senior fitness tests) were evaluated. Dynapenia was established according to a handgrip strength index (handgrip strength divided by body weight (BW) in Kg/KgBW) obtained from a reference population of young women: Type I dynapenic (<0...
September 15, 2016: Brazilian Journal of Physical Therapy
Flavia Vanessa Medeiros, Martim Bottaro, Amilton Vieira, Tiago Pires Lucas, Karenina Arrais Modesto, Antonio Padilha L Bo, Gerson Cipriano, Nicolas Babault, João Luiz Quaglioti Durigan
OBJECTIVE: To test the hypotheses that, as compared with pulsed current with the same pulse duration, kilohertz frequency alternating current would not differ in terms of evoked-torque production and perceived discomfort, and as a result, it would show the same current efficiency. DESIGN: A repeated-measures design with 4 stimuli presented in random order was used to test 25 women: (1) 500-microsecond pulse duration, (2) 250-microsecond pulse duration, (3) 500-microsecond pulse duration and low carrier frequency (1 kHz), (4) 250-microsecond pulse duration and high carrier frequency (4 kHz)...
September 26, 2016: American Journal of Physical Medicine & Rehabilitation
Stéphanie Dehem, Thierry Lejeune, Gaëtan Stoquart, Christine Detrembleur, Anne Renders, Martin Edwards, Charlotte Clarinval, Cécile Frognet, Isaline Brouwers, Vincenza Montedoro, Daniel Galinski
OBJECTIVE: To validate, establish norms and evaluate the reproducibility of upper limb motor assessment tasks using REAplan in healthy children. REAplan is a rehabilitation robotic device allowing upper limb mobilization in the horizontal plane. MATERIAL/PATIENTS AND METHODS: Forty-nine healthy children between six and twelve years participated in this study. Each child was assessed clinically and with REAplan, and twelve children were assessed twice. Elbow flexor and extensor muscles force were assessed with an isometric dynamometer Microfet II...
September 2016: Annals of Physical and Rehabilitation Medicine
Isabelle Conforto, Emmanuel Coudeyre
OBJECTIVE: To evaluate the relation between prehension strength, dexterity and axonal loss in a same cohort of CMT1A patients with valid tools. CMT1A is the most common form of hereditary neuropathy. The upper limb impairment creates a weakness of intrinsic hand muscles, an opposition, prehension strength and axonal loss. MATERIALS/PATIENTS AND METHODS: Patients were recruited from November 2012 to November 2014 by Physicals Rehabilitation Medicine and Neurologicals consultations of Clermont Ferrand's University Hospital...
September 2016: Annals of Physical and Rehabilitation Medicine
Flavia Coroian, Jérôme Froger, H-Y Bonnin Koang, Claire Jourdan, Karima Bakhti, Marc Julia, Audrey Jaussent, Christian Hérisson, Isabelle Laffont
OBJECTIVE: The sensori-motor impairment of upper limb (UL) affects more than 50% of patients after stroke. The objective of this work was to study the efficiency of isokinetic muscle strengthening (IMS) in the chronic phase of stroke in this population. MATERIAL/PATIENTS AND METHODS: The patients underwent 6 weeks of outpatient rehabilitation, 3 days per week, combining physiotherapy (twice/day) and occupational therapy every day. The program was completed by 30 minutes elbow and wrist concentric slow speed IMS of flexor and extensor muscles, in the study group versus 30 minutes passive mobilisation of the joints carried out by the same isokinetic dynamometer in the control group...
September 2016: Annals of Physical and Rehabilitation Medicine
Imen Fekhfekh, Abdelmoneem Yahia, Mokhtar Chaabene, Salma Jribi, Nizar Suissi, Mohamed Habib Elleuch, Sameh Ghroubi
OBJECTIVE: To study the acute effect of static and dynamic stretching on the knee muscle strength and postural capacity in athletes. PATIENTS AND METHODS: Fifteen judokas performed 2 stretching protocols (static and dynamic) on the muscles of both lower limbs with an interval of 48hours in a random order. An evaluation of the dominant knee muscle strength with an isokinetic dynamometer CybexNormII was performed before and after each stretching protocol in a concentric mode at a speed of 60 and 180°/s...
September 2016: Annals of Physical and Rehabilitation Medicine
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