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Jairo H Migueles, Cristina Cadenas-Sanchez, Catrine Tudor-Locke, Marie Löf, Irene Esteban-Cornejo, Pablo Molina-Garcia, Jose Mora-Gonzalez, Maria Rodriguez-Ayllon, Eduardo Garcia-Marmol, Ulf Ekelund, Francisco B Ortega
This study aimed to compare estimations of sedentary time (SED) and time spent in physical activity (PA) intensities in children with overweight/obesity across different age-appropriate cut-points based on different body-worn attachment sites and acceleration metrics. A total of 104 overweight/obese children (10.1±1.1 years old, 43 girls) concurrently wore ActiGraph GT3X+ accelerometers on their right hip and non-dominant wrist for 7 days (24 hours). Euclidean Norm Minus One g (ENMO) and activity counts from both vertical axis (VACounts) and vector magnitude (VMCounts) were derived...
December 12, 2018: Scandinavian Journal of Medicine & Science in Sports
Laurent Degroote, Ilse De Bourdeaudhuij, Maïté Verloigne, Louise Poppe, Geert Crombez
BACKGROUND: Wearables for monitoring physical activity (PA) are increasingly popular. These devices are not only used by consumers to monitor their own levels of PA but also by researchers to track the behavior of large samples. Consequently, it is important to explore how accurately PA can be tracked via these devices. OBJECTIVES: The aim of this study was, therefore, to investigate convergent validity of 3 Android Wear smartwatches-Polar M600 (Polar Electro Oy, Kempele, Finland), Huawei Watch (Huawei Technologies Co, Ltd, Shenzhen, Guangdong, China), Asus Zenwatch3 (AsusTek Computer Inc, Taipei, Taiwan)-and Fitbit Charge with an ActiGraph accelerometer for measuring steps and moderate to vigorous physical activity (MVPA) on both a day level and 15-min level...
December 13, 2018: JMIR MHealth and UHealth
Jeffer Eidi Sasaki, Robert W Motl, Edward McAuley
This study examines the validity of the Marshall Sitting Questionnaire (MSQ) in people with multiple sclerosis (MS) and presents a prediction model to improve the accuracy of the MSQ estimates. Participants (n = 63 [15M and 48F], age: 56.6 ± 7.3 years) wore an accelerometer on the hip for a 7-day period and completed the MSQ. Sedentary behaviour (SB) estimates were computed as min/day for both the MSQ and accelerometer. Associations between the two methods were examined using the Pearson correlation and agreement was assessed using a Bland-Altman plot...
December 13, 2018: Journal of Sports Sciences
Chris H L Thio, Priya Vart, Lyanne M Kieneker, Harold Snieder, Ron T Gansevoort, Ute Bültmann
Background: The longitudinal association between low education and chronic kidney disease (CKD) and its underlying mechanisms is poorly characterized. We therefore examined the association of low education with incident CKD and change in kidney function, and explored potential mediators of this association. Methods: We analysed data on 6078 participants from the community-based Prevention of Renal and Vascular End-stage Disease study. Educational level was categorized into low, medium and high (< secondary, secondary/equivalent, > secondary schooling, respectively)...
December 12, 2018: Nephrology, Dialysis, Transplantation
Marco Invernizzi, Alessandro de Sire, Federico D'Andrea, Deborah Carrera, Filippo Renò, Silvia Migliaccio, Giovanni Iolascon, Carlo Cisari
BACKGROUND: Physical exercise and nutrition seem to have a key role in the management of hip fracture patients. AIM: To evaluate the impact of a 2-month rehabilitative protocol combined with dietetic counseling, with or without essential amino acid supplementation, on functioning in hip fracture patients. METHODS: In this pilot randomized controlled study, we recruited patients aged more than 65 years, at 3 months after hip fracture. We randomly assigned the participants into two groups (A and B)...
December 11, 2018: Aging Clinical and Experimental Research
Xipeng Wang, Kiyokazu Fukui, Ayumi Kaneuji, Kenichi Hirosaki, Hiroyasu Miyakawa, Norio Kawahara
PURPOSE: Although studies suggest that subchondral insufficiency fracture of the femoral head may cause rapidly progressive osteoarthritis of the hip, the mechanism of that relationship remains unclear. Our biomechanical study aimed to provide more data in this area by quantifying pressure distribution on the femoral head for normal and inverted hips and by determining the effects of labral inversion on pressure distribution across the joint, focusing on types of fracture under load. METHODS: We tested mid-sized fourth-generation composite femurs at 15° of adduction, and applied 1 mm/min of axial compressive force to the femoral heads until failure...
December 11, 2018: International Orthopaedics
Lokesh Gudda Naik, Won Yong Shon, I C Clarke, Jun-Gyu Moon, Piyush Mukund, Sang-Min Kim
Pseudotumors are not uncommon complications after total hip arthroplasty (THA) and may occur due to differences in bearing surfaces of the head and the liner ranging from soft to hard articulation. The most common causes of pseudotumors are foreign-body reaction, hypersensitivity and wear debris. The spectrum of pseudotumor presentation following THA varies greatly-from completely asymptomatic to clear implant failure. We report a case of pseudo-tumor formation with acetabular cup aseptic loosening after revision ceramic-on-metal hip arthroplasty...
December 2018: Hip & Pelvis
Ryosuke Ando, Shohei Kondo, Keisho Katayama, Koji Ishida, Hiroshi Akima
We aimed to test the hypothesis that the magnitude of differences in muscle activation of the knee and hip extensor muscles between high-intensity interval exercise (HIE) and moderate-intensity constant exercise (CE) would be greater for the gluteus maximus than for the quadriceps femoris muscle. Participants were 11 male middle- or long-distance runners. The HIE (4 sets, 4-min induration, performed at 80-85%VO2peak and followed by a 3-min period of cycling at < 30%VO2peak ) and CE (28-min, performed at or near 60%VO2peak ) were completed on different days, with the total exercise duration and work being identical for both protocols...
November 28, 2018: Journal of Electromyography and Kinesiology
Xiao-Bin Li, Tao Liu, Lei Fan, Qiang Gao, Qiang Peng, Teng Cai, Li-Min Wang
PURPOSE: The aim of this study was to evaluate the serum levels of retinoic acid (RA), an active form of vitamin A, in postmenopausal women with hip fractures from Zhengzhou, China. METHODS: This was a case-control study from the Affiliated Hospital of Zhengzhou University. Serum samples were drawn from 375 postmenopausal women who were diagnosed as having hip fracture and 750 matched controls without fracture. Serum RA levels were evaluated as both a continuous variable and a categorical variable in quintiles...
December 5, 2018: Journal of the American Geriatrics Society
Sang Tae Choi, Seong-Ryul Kwon, Ju-Yang Jung, Hyoun-Ah Kim, Sung-Soo Kim, Sang Hyon Kim, Ji-Min Kim, Ji-Ho Park, Chang-Hee Suh
(1) Background: We evaluated the prevalence and fracture risk of osteoporosis in patients with rheumatoid arthritis (RA), and compared the fracture risk assessment tool (FRAX) criteria and bone mineral density (BMD) criteria established by the World Health Organization (WHO). (2) Methods: This retrospective cross-sectional study, which included 479 RA patients in 5 hospitals, was conducted between January 2012 and December 2016. The FRAX criteria for high-risk osteoporotic fractures were calculated including and excluding the BMD values, respectively...
December 2, 2018: Journal of Clinical Medicine
Rodrigo Bini, Daniel Wundersitz, Michael Kingsley
This study quantified the biomechanical (movements and forces) and physiological (energy expenditure) demands of postal delivery performed with electrically assisted bicycles (EABs). Ten postal workers and 10 recreational athletes performed three simulated postal tasks (simulated mail delivery circuit, delivery distance [close vs. far], and 3-min stationary cycling) while carrying 0, 16 and 32 kg. Physiological (energy expenditure) and biomechanical (internal and external forces and joint angles) responses were calculated...
February 2019: Applied Ergonomics
Edward Fottrell, Naveed Ahmed, Sanjit Kumer Shaha, Hannah Jennings, Abdul Kuddus, Joanna Morrison, Kohenour Akter, Badrun Nahar, Tasmin Nahar, Hassan Haghparast-Bidgoli, A K Azad Khan, Anthony Costello, Kishwar Azad
Background: Non-communicable diseases (NCDs) are increasing in low-income settings. We conducted a survey of risk factors, blood pressure and blood glucose in rural Bangladesh and assessed variations by age, sex and wealth. Methods: We surveyed a random sample of 12 280 adults aged >30 years in 96 villages in rural Bangladesh. Fieldworkers measured blood glucose and conducted an insulin tolerance test with a repeat blood test 120 min post glucose ingestion. Blood pressure, anthropometric, socioeconomic, lifestyle and behavioural risk factors data were also collected...
2018: BMJ Global Health
Sang-Kyoon Park, Hyun-Min Jeon, Wing-Kai Lam, Darren Stefanyshyn, Jiseon Ryu
BACKGROUND: The purpose of this study was to investigate how lower extremity kinematics and kinetics change when running downhill. METHODS: Fifteen male recreational runners ran on an instrumented treadmill with three different slope conditions [level (0°), moderate (-6°), and steep (-9°)] at a controlled speed of 3.2 m/s. Ten consecutive steps were selected for analysis for each of the slope conditions and the order of slope conditions was randomized. Synchonized motion analysis and force plate were used to determine joint kinematics and kinetics...
November 12, 2018: Gait & Posture
Amanda E Staiano, Corby K Martin, Catherine M Champagne, Jennifer C Rood, Peter T Katzmarzyk
Background: Young adulthood is a critical period for excessive weight gain. The extent to which young adults' sedentary time (ST) and moderate-to-vigorous physical activity (MVPA) relate to adiposity and weight gain remains unclear. Objective: The purpose of this study was to examine the relation of ST and MVPA with adiposity and change in adiposity in healthy, nonobese young adults over a 2-y period. Design: Participants were 71 adults aged 20-35 y...
November 1, 2018: American Journal of Clinical Nutrition
Yoonjin Kim, Nicholas J Giori, Dokwan Lee, Kyung-Sik Ahn, Chang Ho Kang, Choongsoo S Shin, Yongnam Song
Damage to the acetabular labrum has been associated with cartilage degeneration. Because conventional pressure measurement devices were unable to examine the sealing function of the acetabular labrum on cartilage contact mechanics, we used an image-based computational method to examine how labrectomy affects articular cartilage contact area and strain patterns in porcine hips. Cyclically loaded hip samples were continuously imaged in a CT scanner every 3 min to trace the positions of the femur and acetabulum...
November 24, 2018: Biomechanics and Modeling in Mechanobiology
Jacob C Mandell, William C Wrobel, Olga Laur, Nandish Shah, Cory Robinson-Weiss, Michael J Weaver, Bharti Khurana
PURPOSE: To demonstrate the effect of teaching a simplified treatment-based classification of proximal femoral fractures on the accuracy, confidence, and inter-reader agreement of radiology residents. The authors hypothesize that these measures will improve after viewing an educational presentation. MATERIALS AND METHODS: Three radiology residents independently classified 100 operative proximal femoral fractures, both before and after viewing a 45-min educational video describing the simplified classification scheme, with a washout period of at least 12 weeks between sessions...
November 23, 2018: Emergency Radiology
Minas A Mina, Anthony J Blazevich, Themistoklis Tsatalas, Giannis Giakas, Laurent B Seitz, Anthony D Kay
Studies examining acute, high-speed movement performance enhancement following intense muscular contractions (frequently called 'post-activation potentiation'; PAP) often impose a limited warm-up, compromizing external validity. In the present study the effects on countermovement vertical jump (CMJ) performance of back squat exercises performed with or without elastic bands during warm-up were compared. After familiarization, fifteen active men visited the laboratory on two occasions under randomized, counterbalanced experimental squat warm-up conditions: (1) free-weight resistance (FWR) and (2) variable resistance (VR)...
November 23, 2018: Scandinavian Journal of Medicine & Science in Sports
Shuyang Xie, Min Xie
Dexmedetomidine is a highly selective central α2 adrenergic receptor agonist, which has anti sympathetic, sedative and analgesic effects. The aim of this study was to investigate the effect of dexmedetomidine on postoperative delirium in elderly patients undergoing hip fracture surgery. The results showed that the dosage of sufentanil and propofol decreased significantly in the experimental group (P<0.05). The price-henry pain scores of 10min, 1H and 6h in the experimental group were significantly reduced after the operation...
September 2018: Pakistan Journal of Pharmaceutical Sciences
Rui Li, Ming Ni, Jing Zhao, Xiang Li, Zhuo Zhang, Peng Ren, Chi Xu, Ji-Ying Chen
BACKGROUND Barbed suture has reported time-saving and safety benefits for wound closure in total joint arthroplasty (TJA). However, this technique requires further investigation. The aim of this study was to use a prospective, randomized, self-controlled study to further determine the efficiency and safety of this technology and to introduce our modified suturing method through a randomized, self-controlled trial. MATERIAL AND METHODS From August 2015 to December 2016, 84 patients (hip 46, knee 38) who had undergone primary simultaneous bilateral total knee or hip arthroplasties were enrolled in this study...
November 21, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Wouter Hoogkamer, Shalaya Kipp, Rodger Kram
BACKGROUND: We have shown that a prototype marathon racing shoe reduced the metabolic cost of running for all 18 participants in our sample by an average of 4%, compared to two well-established racing shoes. Gross measures of biomechanics showed minor differences and could not explain the metabolic savings. OBJECTIVE: To explain the metabolic savings by comparing the mechanics of the shoes, leg, and foot joints during the stance phase of running. METHODS: Ten male competitive runners, who habitually rearfoot strike ran three 5-min trials in prototype shoes (NP) and two established marathon shoes, the Nike Zoom Streak 6 (NS) and the adidas adizero Adios BOOST 2 (AB), at 16 km/h...
November 20, 2018: Sports Medicine
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