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https://www.readbyqxmd.com/read/28444436/acute-effects-of-static-stretching-on-muscle-tendon-mechanics-of-quadriceps-and-plantar-flexor-muscles
#1
Tom Bouvier, Jules Opplert, Carole Cometti, Nicolas Babault
PURPOSE: This study aimed to determine the acute effects of static stretching on stiffness indexes of two muscle groups with a contrasting difference in muscle-tendon proportion. METHODS: Eleven active males were tested on an isokinetic dynamometer during four sessions randomly presented. Two sessions were dedicated to quadriceps and the two others to triceps surae muscles. Before and immediately after the stretching procedure (5 × 30 s), gastrocnemius medialis and rectus femoris fascicle length and myotendinous junction elongation were determined using ultrasonography...
April 25, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28442855/the-functional-outcome-of-mini-carpal-tunnel-release
#2
Amaleswaran Anbarasan, Nahulan Thevarajah, Abdul Nawfar Sadagatullah
Introduction Carpal tunnel syndrome (CTS) is one of the most common compression neuropathies in the upper limbs and requires surgery if conservative treatment fails. This study assessed the functional outcome of vertical mini carpal tunnel release (CTR) at distal wrist crease. Objective To evaluate prospectively the safety, effectiveness, and reproducibility of vertical mini-open blind technique for CTR. Methods In total, 36 patients (40 hands) aged between 22 and 71 years with mild to moderate CTS based on nerve conduction studies were selected and screened based on inclusion and exclusion criteria...
April 2017: Journal of Hand and Microsurgery
https://www.readbyqxmd.com/read/28442075/passive-stiffness-of-the-ankle-and-plantar-flexor-muscle-performance-after-achilles-tendon-repair-a-cross-sectional-study
#3
Pollyana R T Borges, Thiago R T Santos, Paula R S Procópio, Jessica H D Chelidonopoulos, Roberto Zambelli, Juliana M Ocarino
BACKGROUND: Deficits in ankle muscle strength and ankle stiffness may be present in those subjects who underwent surgical treatment for an Achilles tendon rupture. The presence of these long-term deficits may contribute to a lower performance during daily activities and may be linked to future injuries. OBJECTIVE: To compare the ankle passive stiffness and the plantar flexor muscle performance in patients who underwent unilateral surgical treatment of Achilles tendon rupture with nonsurgical subjects...
January 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28441489/a-comparison-of-gasoline-direct-injection-gdi-and-port-fuel-injection-pfi-vehicle-emissions-emission-certification-standards-cold-start-secondary-organic-aerosol-formation-potential-and-potential-climate-impacts
#4
Georges Saliba, Rawad Saleh, Yunliang Zhao, Albert A Presto, Andrew T Lambe, Bruce Frodin, Satya Sardar, Hector Maldonado, Christine Maddox, Andrew A May, Greg T Drozd, Allen H Goldstein, Lynn M Russell, Fabian P Hagen, Allen L Robinson
Recent increases in the Corporate Average Fuel Economy standards have led to widespread adoption of vehicles equipped with gasoline direct injection (GDI) engines. Changes in engine technologies can alter emissions. To quantify these effects, we measured gas- and particle-phase emissions from eighty-two light duty gasoline vehicles recruited from the California in-use fleet tested on a chassis dynamometer using the cold-start unified cycle. The fleet included 15 GDI vehicles, including 8 GDIs certified to the most stringent emissions standard, super-ultra-low-emission vehicles (SULEV)...
April 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28441354/design-and-development-of-a-three-component-force-sensor-for-milling-process-monitoring
#5
Yingxue Li, Yulong Zhao, Jiyou Fei, Yafei Qin, You Zhao, Anjiang Cai, Song Gao
A strain-type three-component table dynamometer is presented in this paper, which reduces output errors produced by cutting forces imposed on the different milling positions of a workpiece. A sensor structure with eight parallel elastic beams is proposed, and sensitive regions and Wheastone measuring circuits are also designed in consideration of eliminating the influences of the eccentric forces. To evaluate the sensor decoupling performance, both of the static calibration and dynamic milling test were implemented in different positions of the workpiece...
April 25, 2017: Sensors
https://www.readbyqxmd.com/read/28433808/comparisons-of-hip-strength-and-countermovement-jump-height-in-elite-tennis-players-with-and-without-acute-history-of-groin-injuries
#6
V Moreno-Pérez, A Lopez-Valenciano, D Barbado, J Moreside, J L L Elvira, F J Vera-Garcia
BACKGROUND: Despite the high groin-injury (GI) prevalence in tennis, no studies have assessed the extent to which intrinsic groin injury risk factors, such as hip muscle strength, have recovered in elite tennis players with a history of previous GI. OBJECTIVE: To investigate whether elite tennis players with a history of GI show differences in hip strength and jump height between injured and uninjured limbs and compared with dominant limb in tennis players without history of acute groin-injuries (NGI)...
April 13, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28433473/sex-difference-in-the-heat-shock-response-to-high-external-load-resistance-training-in-older-humans
#7
Rose Njemini, Louis Nuvagah Forti, Tony Mets, Evelien Van Roie, Walter Coudyzer, Ingo Beyer, Christophe Delecluse, Ivan Bautmans
BACKGROUND: Literature reports on the effects of resistance training on heat shock protein70 (Hsp70) adaptation in older subjects are scarce. Moreover, the optimum training load required to obtain a beneficial adaptation profile is lacking. Therefore, the aim of this study was to determine the effects of resistance training at various external loads on extracellular Hsp70 (eHsp70) resting levels in older humans. METHODS: Fifty-six community-dwelling older (68±5years) volunteers were randomized to 12weeks of resistance training (3×/week) at either high-resistance (HIGH, 8 males, 10 females, 2×10-15 repetitions at 80%1RM), low resistance (LOW, 9 Males, 10 Females, 1×80-100 repetitions at 20%1RM), or mixed low resistance (LOW+, 9 Males, 10 Females, 1×60 repetitions at 20%1RM followed by 1×10-20 repetitions at 40%1RM)...
April 19, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28433443/arthroscopic-debridement-versus-platelet-rich-plasma-injection-a-prospective-randomized-comparative-study-of-chronic-lateral-epicondylitis-with-a-nearly-2-year-follow-up
#8
Giovanni Merolla, Fabio Dellabiancia, Annamaria Ricci, Maria Pia Mussoni, Simonetta Nucci, Gustavo Zanoli, Paolo Paladini, Giuseppe Porcellini
PURPOSE: The purpose of this prospective, randomized study was to compare the efficacy of autologous platelet-rich plasma (PRP) injections and arthroscopic lateral release in treating chronic lateral epicondylitis (LE). METHODS: Patients who had a clinical diagnosis of LE confirmed by ultrasound (US) were included in this study. A total of 101 patients received arthroscopic release (n = 50) or US-guided PRP injections (n = 51). Outcomes were assessed using a visual analog scale for pain, the Patient-Rated Tennis Elbow Evaluation (PRTEE), and a calibrated hand dynamometer for grip strength...
April 19, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28431912/osteosarcopenic-obesity-prevalence-and-relation-with-frailty-and-physical-performance-in-middle-aged-and-older-women
#9
Claudia Szlejf, Lorena Parra-Rodríguez, Oscar Rosas-Carrasco
OBJECTIVES: The aims of this study were to determine the prevalence of osteosarcopenic obesity (OSO) and to investigate its association with frailty and physical performance in Mexican community-dwelling middle-aged and older women. DESIGN: Cross-sectional analysis of a prospective cohort. SETTING: The FraDySMex study, a 2-round evaluation of community-dwelling adults from 2 municipalities in Mexico City. PARTICIPANTS: Participants were 434 women aged 50 years or older, living in the designated area in Mexico City...
April 18, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28429040/retraction-force-necessary-to-expose-the-mandibular-neck-in-risdon-and-high-cervical-anteroparotid-transmasseteric-approaches-an-anatomic-comparative-study
#10
Jérôme Adnot, Aliosha Feuss, Fabrice Duparc, Olivier Trost
PURPOSE: The purpose of this anatomic study was to compare the retraction force necessary to expose the mandibular neck in the Risdon and the high cervical anteroparotid transmasseteric (HAT) approaches. METHODS: An anatomic study was performed on 18 formalin-embalmed cadavers. We performed a Risdon approach on the left side, and an HAT approach on the right side in all the cases. The subjects were placed in a normative frame and the force necessary to maintain a satisfactory exposure of the condyle was measured with a system of cables, pulleys, and mechanical dynamometer...
April 20, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28426205/euro-6-unregulated-pollutant-characterization-and-statistical-analysis-of-aftertreatment-device-and-driving-condition-impact-on-recent-passenger-car-emissions
#11
Simon Martinet, Yao Liu, Cédric Louis, Patrick Tassel, Pascal Perret, Agnès Chaumond, Michel Andre
This study aims to measure and analyze unregulated compound emissions for two Euro 6 diesel and gasoline vehicles. The vehicles were tested on a chassis dynamometer under various driving cycles: Artemis driving cycles (urban, road and motorway), the New European Driving Cycle (NEDC) and the World Harmonized Light-Duty Test Cycle (WLTC) for Europe, and world approval cycles. The emissions of unregulated compounds - such as total particle number (PN) (over 5.6 nm), black carbon (BC), NO2, BTEX (benzene, toluene, ethylbenzene and xylene), carbonyl compounds and polycyclic aromatic hydrocarbons (PAHs) - were measured with several on-line devices and different samples were collected using cartridges and quartz filters...
April 20, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28418751/influence-of-exergaming-on-the-perception-of-cancer-related-fatigue
#12
Ricardo da Silva Alves, Denise Hollanda Iunes, Isabela Carvalho Pereira, Juliana Bassalobre Carvalho Borges, Denismar Alves Nogueira, Andreia Maria Silva, Daniel Ferreira Moreira Lobato, Leonardo Cesar Carvalho
OBJECTIVE: Exercise is recommended for cancer patients to reduce fatigue and improve quality of life. This study's aim is to evaluate the influence of an exergaming protocol on cancer-related fatigue, muscle fatigue, and muscle strength in cancer patients. MATERIALS AND METHODS: We conducted a quasi-experimental control study using exergaming in all groups through an Xbox360 Kinect™ console, two to three times per week, for 20 sessions. Three groups were created: cancer patients in chemotherapy and/or radiotherapy group (CRG; n:15), cancer patients after chemotherapy and/or radiotherapy (CAG; n:15), and a control group (CG; n:15)...
April 2017: Games for Health
https://www.readbyqxmd.com/read/28416155/tracking-of-muscular-strength-and-power-from-youth-to-young-adulthood-longitudinal-findings-from-the-childhood-determinants-of-adult-health-study
#13
Brooklyn J Fraser, Michael D Schmidt, Quan L Huynh, Terence Dwyer, Alison J Venn, Costan G Magnussen
OBJECTIVES: Low muscular fitness levels have previously been reported as an independent risk factor for chronic disease outcomes. Muscular fitness tracking, the ability to maintain levels measured at one point in time to another point in time, was assessed from youth to adulthood to provide insight into whether early identification of low muscular fitness in youth is possible. DESIGN: Prospective longitudinal study. METHODS: Study including 623 participants who had muscular fitness measures in 1985 (aged 9, 12 or 15 years) and again 20 years later in young adulthood...
March 31, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28415923/hand-grip-strength-determination-for-healthy-males-in-saudi-arabia-a-study-of-the-relationship-with-age-body-mass-index-hand-length-and-forearm-circumference-using-a-hand-held-dynamometer
#14
Khalid A Alahmari, S Paul Silvian, Ravi Shankar Reddy, Venkata Nagaraj Kakaraparthi, Irshad Ahmad, Mohammad Mahtab Alam
Objectives To determine whether age, body mass index (BMI), hand length and forearm circumference were predictive of hand grip strength in healthy Saudi Arabian adult males. Methods This cross-sectional descriptive study recruited healthy adult male volunteers. Their anthropometric characteristics including age, BMI, hand length and forearm circumference were measured using routine techniques. Hand grip strength was assessed using a Jamar® Hydraulic Hand Dynamometer. The data were analysed using Pearson correlation coefficient ( r) as well as by a stepwise multiple linear regression analysis...
April 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28413452/ankle-and-toe-muscle-strength-characteristics-in-runners-with-a-history-of-medial-tibial-stress-syndrome
#15
Junya Saeki, Masatoshi Nakamura, Sayaka Nakao, Kosuke Fujita, Ko Yanase, Katsuyuki Morishita, Noriaki Ichihashi
BACKGROUND: A high proportion of flexor digitorum longus attachment is found at the posteromedial border of the tibia, which is the most common location of medial tibial stress syndrome (MTSS). Therefore, plantar flexion strength of the lesser toes could be related to MTSS; however, the relationship between MTSS and muscle strength of the hallux and lesser toes is not yet evaluated due to the lack of quantitative methods. This study investigated the muscle strength characteristics in runners with a history of MTSS by using a newly developed device to measure the muscle strength of the hallux, lesser toes, and ankle...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/28410094/stiffness-perception-during-active-ankle-and-knee-movement
#16
Alejandro F Azocar, Elliott J Rouse
OBJECTIVE: Recently, human joint impedance-the instantaneous mechanical response to a perturbation-has been quantified during gait, providing new insight beyond the traditional biomechanical descriptions of kinetics and kinematics. However, the role of joint impedance in neuromotor control and the development of exoskeletons and other wearable robotic systems remains unknown. One approach to studying the role of impedance in neuromotor control involves characterizing the human ability to discriminate changes in external impedance properties...
April 6, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28409769/investigation-of-the-relationship-between-anthropometric-measurements-and-maximal-handgrip-strength-in-young-adults
#17
Christopher Eidson, Gavin R Jenkins, Hon K Yuen, Anne Abernathy, Mary Beth Brannon, Anna Pung, Kiara Ward, Tara Weaver
BACKGROUND: To identify physical measures that predict maximal handgrip strength (MHGS) and provide evidence for identifying lack of maximum effort with assessing upper extremity weakness. OBJECTIVE: This study investigated anthropometric measurements associated with MHGS of healthy young adults. METHODS: A convenience sample of 150 healthy adults ages 19 to 34 years old completed the MHGS assessment, which was measured using a Jamar dynamometer according to the protocol of the American Society of Hand Therapists, for both dominant and non-dominant hands...
April 12, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28409514/neck-strength-and-self-reported-neck-dysfunction-what-is-the-impact-of-a-season-of-rugby-union
#18
Danielle M Salmon, S John Sullivan, Phil Handcock, Nancy J Rehrer, Brian Niven
BACKGROUND: Neck strength has been reported to reduce the incidence of concussions and neck injuries. However little is known about how neck strength changes over a playing season. AIM: To understand the impact a 20-week rugby season has on neck strength, neck pain (NP) and neck stiffness (NS) in a cohort of rugby players, relative to a non-contact control group. METHODS: This prospective cohort study employed a fixed-frame dynamometer to measure neck strength in a simulated contact posture in rugby players (n=32) and controls (n=15)...
April 13, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28400666/limited-incision-carpal-tunnel-release
#19
Sunil Gaba, Sandeep Bhogesha, Onkar Singh
BACKGROUND: Carpal tunnel syndrome (CTS) is the most common peripheral entrapment neuropathy. Limited incision techniques for carpal tunnel release are gaining popularity. The main advantages of these techniques are less scar load, less pillar pain, shorter recovery, and return-to-work time. However, the completeness of release, and risk of neurovascular injury are always a concern. We devised a method of limited incision release with two mini-incisions and use of nasal speculum and a probe...
March 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28400662/early-anterior-cruciate-ligament-reconstruction-can-save-meniscus-without-any-complications
#20
Chang-Ik Hur, Eun-Kyoo Song, Sung-Kyu Kim, Seung-Hun Lee, Jong-Keun Seon
BACKGROUND: Early ACL reconstruction, before retuning to activity eliminates recurrent episodes of instability and thereby decreases chances of meniscal and cartilage injury. However, there are no clear and uniform guidelines regarding the timing of ACL reconstruction or clarity in the definition of early and delayed reconstruction to reduce the complications after reconstruction in the ACL injured knee. The purpose of this study was to compare the clinical outcome, stability, muscle power, and postural control after early and delayed anterior cruciate ligament (ACL) reconstruction...
March 2017: Indian Journal of Orthopaedics
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