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https://www.readbyqxmd.com/read/29140148/the-reliability-of-individualized-load-velocity-profiles
#1
Harry G Banyard, K Nosaka, Alex D Vernon, G Gregory Haff
PURPOSE: This study examined the reliability of peak velocity (PV), mean propulsive velocity (MPV), and mean velocity (MV) in the development of load-velocity profiles (LVP) in the full depth free-weight back squat performed with maximal concentric effort. METHODS: Eighteen resistance-trained men performed a baseline one-repetition maximum (1RM) back squat trial and three subsequent 1RM trials used for reliability analyses, with 48-hours interval between trials...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29135892/-lower-body-lift-in-the-massive-weight-loss-patient-a-new-classification-and-algorithm-for-gluteal-augmentation
#2
Taliah Schmitt, Samer Jabbour, Rani Makhoul, Warren Noel, Anne-Sophie Reguesse, Philippe Levan
BACKGROUND: An often neglected part of the lower body lift procedure is the gluteal region. The objective of this study is to classify the massive weight loss (MWL) patients undergoing a body lift procedure and provide a safe, standardized approach for gluteal augmentation. METHODS: A retrospective review of all body lift procedures performed between January 2012 and January 2017 was conducted. Patients undergoing a lower body lift with or without gluteal augmentation were included for analysis...
November 8, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29135818/trends-of-magnet-ingestion-in-children-an-ironic-attraction
#3
Patrick Todd Reeves, Cade M Nylund, Jayasree Krishnamurthy, R Adam Noel, Mazen I Abbas
BACKGROUND AND OBJECTIVES: Ingestion of rare earth magnets is a serious ongoing hazard for pediatric patients. Our study aims to investigate whether 2012 Consumer Product Safety Commission (CPSC) policy action, in coordination with efforts from consumer and physician advocacy groups, decreased the incidence of magnet ingestions in children in US since 2012. METHODS: Data from the National Electronic Injury Surveillance System (NEISS) was used to evaluate trends in emergency department (ED) encounters with pediatric patients (<18 years) who presented with suspected magnet ingestions (SMI) from 2010-2015...
November 11, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29129587/thighplasty-improving-aesthetics-through-revival-of-the-medial-horizontal-procedure-a-safe-and-scar-saving-option
#4
Karl Schwaiger, Elisabeth Russe, Klemens Heinrich, Florian Ensat, Gernot Steiner, Gottfried Wechselberger, Michaela Hladik
INTRODUCTION: Thighplasty is a common bodycontouring procedure, but also associated with a high complication rate. The purpose of this study was to access the outcome of the medial horizontal thigh lift as it is a common surgical technique regarding thigh deformity correction performed at the authors' department. Surgical keysteps, clinical applications, advantages and disadvantages of the procedure are shown. Postoperative evaluation took place with special focus on individual patient satisfaction...
October 25, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29122201/factors-determining-workers-pace-while-conducting-continuous-sequential-lifting-carrying-and-lowering-tasks
#5
Yaar Harari, Raziel Riemer, Avital Bechar
To plan a new manual material handling work process, it is necessary to predict the times required to complete each task. Current time prediction models lack validity when the handled object's mass exceeds 2 kg. In this study, we investigated the effect of workplace design parameters on continuous sequential lifting, carrying, and lowering of boxes weighing from 2 kg to 14 kg. Both laboratory and field experiments were conducted. Results revealed that the box's weight and the lifting and lowering heights influenced the tasks' times...
February 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29112055/self-selected-resistance-exercise-load-implications-for-research-and-prescription
#6
Sebastião Barbosa-Netto, Obanshe S dʼAcelino-E-Porto, Marcos B Almeida
Barbosa-Netto, S, d'Acelino-e-Porto, OS, and Almeida, MB. Self-selected resistance exercise load: implications for research and prescription. J Strength Cond Res XX(X): 000-000, 2017-Resistance training has been widely used for maintaining or improving the quality of life and sports performance. It is not clear, however, whether the load commonly used in these exercises is equivalent to the number of repetitions determined for execution, that is, the level of effort applied to the self-selected load. Ergo, the aim of this study was to identify the number of maximum repetitions that strength training practitioners can perform with the load commonly used (self-selected) to perform 10 repetitions in their training routines...
November 1, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29106420/a-small-graphene-oxide-sheet-polyvinylidene-fluoride-bilayer-actuator-with-large-and-rapid-responses-to-multiple-stimuli
#7
Guochuang Xu, Miao Zhang, Qinqin Zhou, Hongwu Chen, Tiantian Gao, Chun Li, Gaoquan Shi
A high-performance actuator should be able to deliver large-shape deformations, fast actuations and sensitive responses to multiple stimuli. Here, we report such an actuator constructed from one layer of polyvinylidene fluoride (PVDF) with a high coefficient of thermal expansion (CTE), and another layer of small sheets of graphene oxide (SGO) with a negative CTE. The opposite deformations of both actuation layers make the SGO/PVDF bilayer actuator highly sensitive to the temperature stimulus with a large bending sensitivity of 1...
November 16, 2017: Nanoscale
https://www.readbyqxmd.com/read/29102804/sensorimotor-training-alters-action-understanding
#8
Caroline Catmur, Emma L Thompson, Orianna Bairaktari, Frida Lind, Geoffrey Bird
The discovery of 'mirror' neurons stimulated intense interest in the role of motor processes in social interaction. A popular assumption is that observation-related motor activation, exemplified by mirror neurons' matching properties, evolved to subserve the 'understanding' of others' actions. Alternatively, such motor activation may result from sensorimotor learning. Sensorimotor training alters observation-related motor activation, but studies demonstrating training-dependent changes in motor activation have not addressed the functional role of such activation...
November 2, 2017: Cognition
https://www.readbyqxmd.com/read/29096984/segmental-variations-in-facet-joint-translations-during-in-vivo-lumbar-extension
#9
Ryan M Byrne, Yu Zhou, Liying Zheng, Suman K Chowdhury, Ameet Aiyangar, Xudong Zhang
The lumbar facet joint (FJ) is often associated with pathogenesis in the spine, but quantification of normal FJ motion remains limited to in vitro studies or static imaging of non-functional poses. The purpose of this study was to quantify lumbar FJ kinematics in healthy individuals during functional activity with dynamic stereo radiography (DSX) imaging. Ten asymptomatic participants lifted three known weights starting from a trunk-flexed (∼75°) position to an upright position while being imaged within the DSX system...
October 19, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29089111/trunk-response-and-stability-in-standing-under-sagittal-symmetric-pull-push-forces-at-different-orientations-elevations-and-magnitudes
#10
Z El Ouaaid, A Shirazi-Adl, A Plamondon
To reduce lifting and associated low back injuries, manual material handling operations often involve pulling-pushing of carts at different weights, orientations, and heights. The loads on spine and risk of injury however need to be investigated. The aim of this study was to evaluate muscle forces, spinal loads and trunk stability in pull-push tasks in sagittal-symmetric, static upright standing posture. Three hand-held load magnitudes (80, 120 and 160 N) at four elevations (0, 20, 40 and 60 cm to the L5-S1) and 24 force directions covering all pull/push orientations were considered...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29084328/effects-of-group-fitness-classes-on-stress-and-quality-of-life-of-medical-students
#11
Dayna M Yorks, Christopher A Frothingham, Mark D Schuenke
Context: Medical school can produce intense psychological distress in its students; however, there is a paucity of research exploring potential means of improving medical students' well-being. Objective: To investigate the relationship between physical exercise and stress and quality of life (QOL) in a medical student population. Methods: This nonrandomized, controlled, 12-week study used a survey research design. First- and second-year osteopathic medical students at the University of New England College of Osteopathic Medicine were recruited to participate in 1 of 3 groups: (1) students participating in 30-minute CXWORX (Les Mills International LTD) group fitness classes; (2) students exercising alone or with up to 2 additional partners regularly (eg, running, weight lifting), henceforth called the health-enhancement group; and (3) students in a control group who did not engage in regular exercise...
November 1, 2017: Journal of the American Osteopathic Association
https://www.readbyqxmd.com/read/29079834/dynamic-pseudorotaxane-crystals-containing-metallocene-complexes
#12
Kai-Jen Chen, Pei-Lin Chen, Masaki Horie
Molecular machines and switches composed of flexible pseudorotaxanes respond to external stimuli, transducing incident energy into mechanical motions. This study presents thermo- and photoresponsive dynamic pseudorotaxane crystals composed of axle molecules containing ferrocene or ruthenocene groups threaded through dibenzo[24]crown-8 ether rings. The ruthenocene-containing pseudorotaxane exhibits a crystal-to-crystal thermal phase transition at 86 °C, which is much lower than that of the ferrocene-containing pseudorotaxane (128 °C)...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29076958/gluteus-maximus-and-hamstring-activation-during-selected-weight-bearing-resistance-exercises
#13
Kevin McCurdy, John Walker, Derrick Yuen
McCurdy, K, Walker, J, and Yuen, D. Gluteus maximus and hamstring activation during selected weight-bearing resistance exercises. J Strength Cond Res XX(X): 000-000, 2017-The purpose of this study was to compare the gluteus maximus (GM) and hamstring group (HG) electromyographic (EMG) activation levels among selected weight-bearing resistance exercises. Eighteen young adult females with previous resistance training experience completed the study. Strength was assessed on the bilateral squat (BS) (3 repetition maximum [RM]), modified single-leg squat (MSLS) (3RM), and stiff-leg deadlift (SLDL) (8RM) to determine an 8RM load for all lifts...
October 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29075821/mastopexy-on-reconstructed-breast-following-massive-weight-loss-an-innovative-technique-using-dermo-capsular-flaps
#14
A Cogliandro, M Barone, G Cassotta, R Salzillo, P Persichetti
BACKGROUND: We have developed a dermo-capsular flap mastopexy technique for patients who have experienced massive weight loss after breast reconstruction. The aim of this technique is to lift the inframammary fold, adequately cover the implant, and remove excess skin, elevating the breast and obtaining symmetry with the contralateral breast. METHODS: Between January 2014 and February 2017, we performed this technique on 20 women who were candidates for second-stage breast reconstruction following nipple-sparing mastectomy...
October 26, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/29075819/augmentation-mastopexy-with-a-dermal-encapsulated-round-or-anatomic-autoprosthesis
#15
Safvet Ors
INTRODUCTION: Several factors, such as aging, pregnancy, and weight loss, reduce the elasticity of the breast tissue, and ptosis occurs. Due to aging and gravity, it is not possible to completely prevent breast ptosis. The goal is to delay the recurrence of ptosis as much as possible. PATIENTS AND METHODS: This study included 20 female patients aged 25-55 years. The patients who underwent surgery had different levels of ptosis. Although the patients wanted their breasts to be lifted and an increase in projection, they did not want implants to be used...
October 26, 2017: Aesthetic Plastic Surgery
https://www.readbyqxmd.com/read/29068923/impact-of-patient-subtype-and-surgical-variables-on-abdominoplasty-outcomes-a-12-year-massachusetts-general-hospital-experience
#16
Akhil K Seth, Alex M Lin, William G Austen, Robert H Gilman, Gregory G Gallico, Amy S Colwell
BACKGROUND: The traditional abdominoplasty is one of the most common surgical procedures performed. This study evaluates the impact of different surgical techniques and clinical patient factors on abdominoplasty outcomes. METHODS: A retrospective review of consecutive patients undergoing abdominoplasty was performed. RESULTS: Seven hundred seventy-nine patients with a mean age of 43.7 years and a body mass index of 27 kg/m underwent abdominoplasty...
November 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29064986/male-surgical-neck-rejuvenation
#17
REVIEW
Ronald L Moy, Lauren Moy
BACKGROUND: Patients who are aging, with weight gain, and increased skin laxity, request dermatologists to improve their neck area. Surgical and nonsurgical options are reviewed as well as benefits and side effects. This article will focus on how surgical techniques can be applied for male patients in particular. OBJECTIVE: To review surgical neck rejuvenation therapies available currently to find the best option for male patients. CONCLUSION: Surgical treatment of the male neck to improve mandibular contour and loose neck skin requires tightening of the platysmal muscle and usually skin removal in the postauricular sulcus and into the hairline...
November 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29060414/entropy-of-surface-emg-reflects-object-weight-in-grasp-and-lift-task
#18
Yuqi Li, Beth Jelfs, Rosa H M Chan
Fingertip force coordination is crucial to the success of grasp-and-lift tasks. In the development of motor prosthesis for daily applications, the ability to accurately classify the desired grasp-and-lift from multi-channel surface electromyography (sEMG) is essential. In order to extract reliable indicators for fingertip force coordination, we searched an extensive set of sEMG features for the optimal subset of relevant features. Using mutual information based feature selection we found that a subset of not more than 10 sEMG features selected from over seven thousand, could effectively classify object weights in grasp-and-lift tasks...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059498/respiratory-reflex-generated-by-movement-of-the-arms
#19
Ranjit K Mal
In their article "Motor control of the trunk during a modified clean and jerk lift", Eriksson Crommert, Ekblom and Thortensson(1) measured the intra-abdominal pressure (IAP) and trunk muscle activity at various stages of lifting a 30-kg weight. They observed that the "TrA (transversus abdominis muscle) was more active in a position with augmented postural demand, i.e., with the arms above the head" and that "The activation of TrA was relatively low in the lower parts of the lift, despite a higher load in terms of imposed flexor moment (judged from the sketches in the figures, not calculated) corroborated by increases in ES activation and IAP amplitude, both providing the extensor moment necessary to raise the trunk...
October 23, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29058534/comparative-assessment-of-respiratory-and-other-occupational-health-effects-among-elementary-workers
#20
Almas Hamid, Wajeeha Saleem, Ghazala Yaqub, Moin Ud Din Ghauri
OBJECTIVE: The study was conducted to assess hazards faced by elementary workers. METHODS: For this purpose, questionnaire survey and respiratory function test (spirometry) were carried out on 150 respondents. RESULTS: Major hazards identified related to sharp objects, heavy weight lifting, thermally harsh conditions, working at height, whole body vibration, chemicals, pathogens, increased noise levels and confined space entry. Workers suffered from upper and lower respiratory disorder symptoms, digestive problems, optical and musculoskeletal issues etc...
October 23, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
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