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Power duration relationship

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https://www.readbyqxmd.com/read/28195304/association-between-psychological-health-and-wound-complications-after-surgery
#1
P Britteon, N Cullum, M Sutton
BACKGROUND: Surgical wound complications remain a major cause of morbidity, leading to higher costs and reduced quality of life. Although psychological health is widely considered to affect wound healing, the evidence on wound outcomes after surgery is mixed. Studies generally focus on small samples of patients undergoing a specific procedure and have limited statistical power. METHODS: This study investigated the relationship between three different measures of anxiety and/or depression and seven adverse surgical outcomes using observational data collected before and after surgery between 2009 and 2011...
February 14, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28179011/cardiorespiratory-and-metabolic-responses-to-body-mass-based-squat-exercise-in-young-men
#2
Miki Haramura, Yohei Takai, Takaya Yoshimoto, Masayoshi Yamamoto, Hiroaki Kanehisa
BACKGROUND: The purpose of this study was to quantify cardiorespiratory and metabolic responses to body mass-based squat exercise, with specific emphasis on the relationships with the exercise duration. METHODS: Fifteen healthy young men performed body mass-based squat exercise as well as an incremental loaded bicycle test, which determine maximal oxygen uptake and maximal heart rate, with an interval of 2 days between the tests. During both tasks, oxygen uptake, blood lactate concentration (BLa), and heart rate (HR) were determined...
February 8, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28170106/narcissism-and-social-networking-behavior-a-meta-analysis
#3
Timo Gnambs, Markus Appel
OBJECTIVE: The increasing popularity of social networking sites (SNS) such as Facebook and Twitter has given rise to speculations that the intensity of using these platforms is associated with narcissistic tendencies. However, recent research on this issue has been all but conclusive. METHOD: We present a three-level, random-effects meta-analysis including 289 effect sizes from 57 studies (total N = 25,631) on the association between trait narcissism and social networking behavior...
February 7, 2017: Journal of Personality
https://www.readbyqxmd.com/read/28166392/interictal-network-synchrony-and-local-heterogeneity-predict-epilepsy-surgery-outcome-among-pediatric-patients
#4
Samuel B Tomlinson, Brenda E Porter, Eric D Marsh
OBJECTIVE: Epilepsy is a disorder of aberrant cortical networks. Researchers have proposed that characterizing presurgical network connectivity may improve the surgical management of intractable seizures, but few studies have rigorously examined the relationship between network activity and surgical outcome. In this study, we assessed whether local and global measures of network activity differentiated patients with favorable (seizure-free) versus unfavorable (seizure-persistent) surgical outcomes...
February 6, 2017: Epilepsia
https://www.readbyqxmd.com/read/28134994/retrospective-analysis-of-the-treatment-of-melasma-lesions-exhibiting-increased-vascularity-with-the-595-nm-pulsed-dye-laser-combined-with-the-1927-nm-fractional-low-powered-diode-laser
#5
REVIEW
Elizabeth R C Geddes, Ashlyn B Stout, Paul M Friedman
BACKGROUND: Melasma presents a significant challenge to laser surgeons. Aggressive treatments often result in rebound melasma or post-inflammatory pigmentary alteration. Recent reports suggest melasma pathogenesis may have a vascular component. Spectrocolorimetry can detect subtle or sub-clinical telangiectatic erythema within melasma lesions. For certain patients identified by spectrocolorimetry, effective melasma treatment may include vascular-targeted therapy together with pigment-specific treatment modalities...
January 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28125096/diabetes-mellitus-an-independent-predictor-of-duration-of-prostaglandin-labor-induction
#6
J S Hawkins, M Stephenson, B Powers, D A Wing
OBJECTIVE: The objective of this study is to analyze the association of diabetes mellitus with progress and outcomes of prostaglandin (PG) labor induction using a retrievable vaginal insert. STUDY DESIGN: This is a secondary analysis of data collected during the Misoprostol Vaginal Insert Trial (Miso-Obs-004), a multicenter, double-blind, randomized controlled trial of women undergoing induction of labor with PGs. The duration, characteristics and outcomes of labor were compared in women with and without diabetes...
January 26, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28086966/predictive-value-of-non-fasting-remnant-cholesterol-for-short-term-outcome-of-diabetics-with-new-onset-stable-coronary-artery-disease
#7
Li-Feng Hong, Xiao-Ni Yan, Zhen-Hua Lu, Ying Fan, Fei Ye, Qiong Wu, Song-Hui Luo, Bo Yang, Jian-Jun Li
BACKGROUND: The relationship between non-fasting remnant cholesterol and cardiovascular outcome in the era of potent statin therapy remained to be elucidated. METHODS: A cohort study of three hundred and twenty eight diabetics diagnosed with new-onset stable coronary artery disease (CAD) by coronary angiography were enrolled. All cases were followed up for an average duration of twelve months. The association between baseline remnant cholesterol levels and major cardiovascular outcomes were evaluated using the receivers operating characteristic (ROC) curves and Cox proportional hazards regression analysis...
January 13, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28073900/the-longer-the-better-an-empirical-study-of-the-extent-and-mechanisms-of-attenuating-biomarker-associations-in-cardiovascular-patient-cohorts
#8
Lutz P Breitling, Ute Mons, Harry Hahmann, Wolfgang Koenig, Dietrich Rothenbacher, Hermann Brenner
BACKGROUND: Identifying novel risk markers in cardiovascular patients remains a research priority. Longer follow-up generally is considered favorable in such studies, but associations of interest may become attenuated with increasing follow-up. This issue has not been adequately addressed in the context of patient cohorts. The current study analyzed the extent and mechanisms of attenuating associations in a cardiovascular patient cohort. METHODS: The associations of numerous biomarkers with all-cause mortality were estimated by multiple Cox regression in the Langzeiterfolge der KARdiOLogischen Anschlussheilbehandlung (KAROLA) prospective cohort study of 1204 patients who had participated in an inpatient rehabilitation program after an acute coronary syndrome (ACS) or coronary bypass operation...
January 10, 2017: Clinical Chemistry
https://www.readbyqxmd.com/read/28049676/power-of-peers-students-perceptions-of-pairing-in-clinical-dental-education
#9
Denise A Mills, Christine L Hammer, Aseel Murad
Prior studies have identified many benefits of peer mentoring in higher education, but the subject has not been widely examined in dental clinical education. Students at Midwestern University College of Dental Medicine-Arizona are paired with a partner for the duration of the clinical phase of education. The initial vision behind pairing was to train students in a realistic four-handed, efficient general practice model. The aim of this study was to assess the students' perceptions of the peer mentoring component of pairing third- and fourth-year dental students in the clinical phase of their education...
January 2017: Journal of Dental Education
https://www.readbyqxmd.com/read/28029445/dual-antagonism-of-pdgf-and-vegf-in-neovascular-age-related-macular-degeneration-a-phase-iib-multicenter-randomized-controlled-trial
#10
Glenn J Jaffe, Thomas A Ciulla, Antonio P Ciardella, Francois Devin, Pravin U Dugel, Chiara M Eandi, Harvey Masonson, Jordi Monés, Joel A Pearlman, Maddalena Quaranta-El Maftouhi, Federico Ricci, Keith Westby, Samir C Patel
PURPOSE: To assess the safety and efficacy of E10030 (Fovista; Ophthotech, New York, NY), a platelet-derived growth factor (PDGF) antagonist, administered in combination with the anti-vascular endothelial growth factor (VEGF) agent ranibizumab (Lucentis; Roche, Basel, Switzerland) compared with ranibizumab monotherapy in patients with neovascular age-related macular degeneration (nAMD). DESIGN: Phase IIb global, multicenter, randomized, prospective, double-masked, controlled superiority trial...
February 2017: Ophthalmology
https://www.readbyqxmd.com/read/28019724/a-comparison-of-methods-to-estimate-anaerobic-capacity-accumulated-oxygen-deficit-and-w-during-constant-and-all-out-work-rate-profiles
#11
Daniel Muniz-Pumares, Charles Pedlar, Richard Godfrey, Mark Glaister
This study investigated (i) whether the accumulated oxygen deficit (AOD) and curvature constant of the power-duration relationship (W') are different during constant work-rate to exhaustion (CWR) and 3-min all-out (3MT) tests and (ii) the relationship between AOD and W' during CWR and 3MT. Twenty-one male cyclists (age: 40 ± 6 years; maximal oxygen uptake [V̇O2max]: 58 ± 7 ml · kg(-1) · min(-1)) completed preliminary tests to determine the V̇O2-power output relationship and V̇O2max. Subsequently, AOD and W' were determined as the difference between oxygen demand and oxygen uptake and work completed above critical power, respectively, in CWR and 3MT...
December 26, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27993483/lens-power-axial-length-to-corneal-radius-ratio-and-association-with-diabetic-retinopathy-in-the-adult-population-with%C3%A2-type-2-diabetes
#12
Jiangnan He, Xian Xu, Jianfeng Zhu, Bijun Zhu, Bo Zhang, Lina Lu, Xiangui He, Xuelin Bai, Xun Xu, Haidong Zou
PURPOSE: To calculate crystalline lens power and to determine the relationship between ocular biometry and diabetic retinopathy (DR) in an adult population with type 2 diabetes mellitus (T2DM). DESIGN: Cross-sectional, population-based study. PARTICIPANTS: Patients with T2DM from the Beixinjing community, Changning district, Shanghai. METHODS: Random clustering sampling was used to identify adults with T2DM in the Beixinjing community...
December 16, 2016: Ophthalmology
https://www.readbyqxmd.com/read/27984792/collating-science-based-evidence-to-inform-public-opinion-on-the-environmental-effects-of-marine-drilling-platforms-in-the-mediterranean-sea
#13
REVIEW
M C Mangano, G Sarà
The use of rigorous methodologies to assess environmental, social and health impacts of specific interventions is crucial to disentangle the various components of environmental questions and to inform public opinion. The power of systematic maps relies on the capacity to summarise and organise the areas or relationships most studied, and to highlight key gaps in the evidence base. The recent Italian technical referendum (2016) - a public consultation inviting people to express their opinion by voting to change the rules on the length of licence duration and the decommissioning of offshore oil and gas platform drilling licences - inspired the creation of a systematic map of evidence to scope and quantify the effects of off-shore extraction platforms on Mediterranean marine ecosystems...
March 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/27982674/blood-pressure-and-hemodynamics-mayer-waves-in-different-phases-of-ovarian-and-menstrual-cycle-in-women
#14
O I Lutsenko, S O Kovalenko
The goal of the research is to investigate the special effect of ovarian-menstrual cycle phases on the level of women's blood pressure and characteristics of Mayer waves. 77 women aged 18-19 were tested under condition close to the state of basal metabolism in follicular phase (I), ovulation (II) and luteal phase (III) of ovarian-menstrual cycle. In phases II and III, the increase of mean and diastolic blood pressure level, in comparison with phase I in the prone position at rest and with psycho-emotional loading, were observed...
December 16, 2016: Physiological Research
https://www.readbyqxmd.com/read/27957244/neglected-features-of-lifestyle-their-relevance-in-non-alcoholic-fatty-liver-disease
#15
Francesca M Trovato, Giuseppe Fabio Martines, Daniela Brischetto, Guglielmo Trovato, Daniela Catalano
AIM: To investigated in non-alcoholic-fatty-liver-disease (NAFLD), with ultrasound (US)-detected fatty liver, and in a group of non-alcoholic and otherwise healthy subjects, relationship of neglected features of lifestyle with NAFLD and obesity. METHODS: Five hundred and thirty-two NAFLD and 667 non-NAFLD healthy subjects, age 21-60 years were studied. Severity of liver steatosis was assessed by US bright liver score. The adherence to mediterranean diet score (AMDS) was assessed on the basis of a 1-wk recall computerized questionnaire which included a detailed physical activity reports (Baecke questionnaire)...
November 28, 2016: World Journal of Hepatology
https://www.readbyqxmd.com/read/27938897/translating-clinical-findings-into-the-patient-s-perspective-post-hoc-pooled-analysis-of-bowel-movement-changes-as-a-predictor-of-improvement-in-patients-opioid-induced-constipation-symptoms-and-outcomes
#16
Karin S Coyne, Jiat-Ling Poon, Christine Thompson, Yiqun Hu, Catherine J Datto, Mark Sostek
PURPOSE: Opioid-induced constipation (OIC) is a bothersome side effect of opioid use for the management of noncancer pain, affecting patients' health-related quality of life and chronic-pain management. The objective of this study was to examine the relationship between changes in the frequency of spontaneous bowel movements (SBMs) and changes in patient-reported outcomes (PROs) among patients with OIC treated with naloxegol. METHODS: Post hoc analyses were conducted using pooled data from two Phase III 12-week, placebo-controlled trials of naloxegol for the treatment of OIC (NCT01309841 and NCT01323790)...
January 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/27918961/the-promise-of-subtraction-ictal-spect-co-registered-to-mri-for-improved-seizure-localization-in-pediatric-epilepsies-affecting-factors-and-relationship-to-the-surgical-outcome
#17
Catherine Stamoulis, Nishant Verma, Himanshu Kaulas, Jonathan J Halford, Frank H Duffy, Phillip L Pearl, S Ted Treves
OBJECTIVE: Ictal SPECT is promising for accurate non-invasive localization of the epileptogenic brain tissue in focal epilepsies. However, high quality ictal scans require meticulous attention to the seizure onset. In a relatively large cohort of pediatric patients, this study investigated the impact of the timing of radiotracer injection, MRI findings and seizure characteristics on ictal SPECT localizations, and the relationship between concordance of ictal SPECT, scalp EEG and resected area with seizure freedom following epilepsy surgery...
January 2017: Epilepsy Research
https://www.readbyqxmd.com/read/27918663/comparison-of-critical-power-and-w-derived-from-two-or-three-maximal-tests
#18
Len Parker Simpson, Mehdi Kordi
PURPOSE: Typically, accessing the asymptote (Critical Power; CP) and curvature constant (W') parameters of the hyperbolic power-duration relationship requires multiple constant-power, exhaustive exercise trials, spread over several visits. However, more recently single-visit protocols and personal power meters have been used. We investigated the practicality of using a two-trial, single-visit protocol in providing reliable CP & W' estimates. METHODS: 8 trained cyclists underwent 3- and 12-min maximal exercise trials in a single session to derive (2-trial) CP & W' estimates...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27856712/rates-of-performance-loss-and-neuromuscular-activity-in-men-and-women-during-cycling-evidence-for-a-common-metabolic-basis-of-muscle-fatigue
#19
Christopher W Sundberg, Sandra K Hunter, Matthew W Bundle
: The durations that muscular force and power outputs can be sustained until failure fall predictably on an exponential decline between an individual's 3-s burst maximum to the maximum performance they can sustain aerobically. The exponential time constants describing these rates of performance loss are similar across individuals, suggesting that a common metabolically based mechanism governs muscle fatigue; however, these conclusions come from studies mainly on men. To test whether the same physiological understanding can be applied to women, we compared the performance-duration relationships and neuromuscular activity between seven men [23...
January 1, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27806677/power-duration-relationship-physiology-fatigue-and-the-limits-of-human-performance
#20
Mark Burnley, Andrew M Jones
The duration that exercise can be maintained decreases as the power requirements increase. In this review, we describe the power-duration (PD) relationship across the full range of attainable power outputs in humans. We show that a remarkably small range of power outputs is sustainable (power outputs below the critical power, CP). We also show that the origin of neuromuscular fatigue differs considerably depending on the exercise intensity domain in which exercise is performed. In the moderate domain (below the lactate threshold, LT), fatigue develops slowly and is predominantly of central origin (residing in the central nervous system)...
November 3, 2016: European Journal of Sport Science
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