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Reactive strength index

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https://www.readbyqxmd.com/read/28077069/a-pilot-study-of-brisk-walking-in-sedentary-combination-antiretroviral-treatement-cart-treated-patients-benefit-on-soluble-and-cell-inflammatory-markers
#1
Matteo Bonato, Laura Galli, Laura Passeri, Valeria Longo, Gaspare Pavei, Simona Bossolasco, Cecilia Bertocchi, Massimo Cernuschi, Giuseppe Balconi, Giampiero Merati, Adriano Lazzarin, Antonio La Torre, Paola Cinque
BACKGROUND: Chronic HIV infection is associated with low-level inflammation and increased risk of chronic diseases and mortality. The objective was to assess the effects of moderate intensity exercise on metabolic and inflammatory markers in HIV-infected treated persons. METHODS: This was a pilot study enrolling cART-treated, sedentary persons with metabolic complications in a 12-week protocol, consisting of three sessions per week of 60 min brisk walking with (strength-walk group) or without (walk group) 30 min circuit-training...
January 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28060927/acute-effects-of-three-neuromuscular-warm-up-strategies-on-several-physical-performance-measures-in-football-players
#2
Francisco Ayala, Ana Calderón-López, Juan Carlos Delgado-Gosálbez, Sergio Parra-Sánchez, Carlos Pomares-Noguera, Sergio Hernández-Sánchez, Alejandro López-Valenciano, Mark De Ste Croix
No studies have analysed the acute effects of the FIFA 11+ and Harmoknee warm-up programmes on major physical performance measures. The aim of this study was to analyse the acute (post-exercise) effects of the FIFA 11+, Harmoknee and dynamic warm-up routines on several physical performance measures in amateur football players. A randomized, crossover and counterbalanced study design was used to address the purpose of this study. A total of sixteen amateur football players completed the following protocols in a randomized order on separate days: a) FIFA 11+; b) Harmoknee; and c) dynamic warm-up (DWU)...
2017: PloS One
https://www.readbyqxmd.com/read/28060035/etiology-and-recovery-of-neuromuscular-fatigue-following-simulated-soccer-match-play
#3
Kevin Thomas, Jack Dent, Glyn Howatson, Stuart Goodall
PURPOSE: We profiled the etiology and recovery of neuromuscular fatigue post-simulated-soccer-match-play. METHODS: Fifteen semi-professional players completed a 90 min simulated soccer match. Pre-, immediately-post and at 24, 48 and 72 h participants completed a battery of neuromuscular, physical and perceptual tests. Perceived fatigue and muscle soreness were assessed via visual analogue scales. Maximum voluntary contraction (MVC) and twitch responses to electrical (femoral nerve) and magnetic (motor cortex) stimulation during isometric knee-extensor contractions and at rest were measured to assess central (voluntary activation, VA) and peripheral (quadriceps potentiated twitch force, Qtw,pot) fatigue, and responses to single and paired-magnetic stimuli were assessed to quantify corticospinal excitability and short-intracortical inhibition (SICI), respectively...
January 3, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28031754/assessing-reactive-strength-measures-in-jumping-and-hopping-using-the-optojump%C3%A2-system
#4
Robin Healy, Ian C Kenny, Andrew J Harrison
The aim of this study was to assess the concurrent validity of the Optojump™ system (Microgate, Bolzano, Italy) versus a force platform in the estimation of temporal and reactive strength measures. In two separate investigations, twenty physically active males performed double-leg and single-leg drop jumps from a box height of 0.3 m and a 10 s vertical bilateral hopping test. Contact time, flight time and total time (the sum of contact and flight time) were concurrently assessed during single and double-leg drop jumps and during hopping...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28000719/association-between-low-grade-albuminuria-and-frailty-among-community-dwelling-middle-aged-and-older-people-a-cross-sectional-analysis-from-i-lan-longitudinal-aging-study
#5
Chun-Chin Chang, Chien-Yi Hsu, Ting-Yung Chang, Po-Hsun Huang, Li-Kuo Liu, Liang-Kung Chen, Jaw-Wen Chen, Shing-Jong Lin
Frailty is characterized by decreased physiological reserve and increased vulnerability to atherosclerosis and subsequent mortality. Recently, low-grade albuminuria has been proposed as an atherosclerotic risk factor. We aimed to investigate the relationship between low-grade albuminuria and frailty by using cross-sectional data among community-dwelling middle-aged and older people. Totally, 1,441 inhabitants of I-Lan County with normal urinary albumin excretion (urine albumin to urine creatinine ratio [UACR] <30 mg/g) were enrolled (677 men; mean age 63 ± 9 years, range from 50 to 91 years old)...
December 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27980346/cytotoxic-gallium-complexes-containing-thiosemicarbazones-derived-from-9-anthraldehyde-molecular-docking-with-biomolecules
#6
Floyd A Beckford, Alyssa Brock, Antonio Gonzalez-Sarrías, Navindra P Seeram
We have synthesized a trio of gallium complexes bearing 9-anthraldehyde thiosemicarbazones. The complexes were assessed for their anticancer activity and their biophysical reactivity was also investigated. The three complexes displayed good cytotoxic profiles against two human colon cancer cell lines, HCT-116 and Caco-2. The IC50 ranged from 4.7 - 44.1 μM with the complex having an unsubstituted amino group on the thiosemicarbazone being the most active. This particular complex also showed a high therapeutic index...
October 5, 2016: Journal of Molecular Structure
https://www.readbyqxmd.com/read/27923668/health-associations-with-meeting-new-24-hour-movement-guidelines-for-canadian-children-and-youth
#7
Valerie Carson, Jean-Philippe Chaput, Ian Janssen, Mark S Tremblay
The study objective was to examine whether meeting the new Canadian 24-hour movement guidelines was associated with health indicators in a representative sample of Canadian children and youth. Cross-sectional findings are based on 4157 (1239 fasting subsample) children and youth aged 6-17years from cycles 1-3 of the Canadian Health Measures Survey (CHMS). Sleep and screen time were subjectively measured while moderate- to vigorous-intensity physical activity (MVPA) was accelerometer-determined. Health indicators in the full sample (body mass index (BMI) z-scores, waist circumference, blood pressure, behavioral strengths and difficulties score (lower=better), and aerobic fitness) and fasting subsample (triglycerides, high-density lipoprotein (HDL)-cholesterol, C-reactive protein, and insulin) were measured...
December 5, 2016: Preventive Medicine
https://www.readbyqxmd.com/read/27918658/countermovement-jump-phase-characteristics-of-senior-and-academy-rugby-league-players
#8
John J McMahon, Shannon Murphy, Sophie J E Rej, Paul Comfort
PURPOSE: Gross measures of countermovement jump (CMJ) performance are commonly used to track maturational changes in neuromuscular function within rugby league (RL). The purpose of this study was to conduct both a gross and a more detailed temporal phase analysis of the CMJ performances of senior and academy RL players, to provide greater insight into how neuromuscular function differs between these groups. METHODS: Twenty senior and fourteen academy (under-19) male RL players performed three maximal effort CMJs on a force platform with forward dynamics subsequently employed to allow gross performance measures and entire kinetic and kinematic-time curves to be compared between groups...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27885059/association-of-grip-strength-with-cardiovascular-risk-markers
#9
Cédric Gubelmann, Peter Vollenweider, Pedro Marques-Vidal
Background Mechanisms underlying the association between grip strength and cardiovascular mortality are poorly understood. We aimed to assess the association of grip strength with a panel of cardiovascular risk markers. Design The study was based on a cross-sectional analysis of 3468 adults aged 50-75 years (1891 women) from a population-based sample in Lausanne, Switzerland. Methods Grip strength was measured using a hydraulic hand dynamometer. Cardiovascular risk markers included anthropometry, blood pressure, lipids, glucose, adiposity, inflammatory and other metabolic markers...
January 1, 2016: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/27835625/use-of-treponemal-screening-assay-strength-of-signal-to-avoid-unnecessary-confirmatory-testing
#10
Gregory J Berry, Michael J Loeffelholz
BACKGROUND: Our reverse syphilis testing algorithm consists of a treponemal IgG multiplex flow immunoassay (MFI) followed by both rapid plasma reagin titer and the Treponema pallidum particle agglutination (TPPA) test on specimens with a reactive MFI result. We report here the impact of a modified reverse algorithm, in which the strength of signal of the MFI is used to avoid unnecessary TPPA testing. METHODS: The Bioplex syphilis IgG MFI was used as the syphilis screening assay, and specimens with equivocal (antibody index 0...
December 2016: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/27821577/hippocampal-mismatch-signals-are-modulated-by-the-strength-of-neural-predictions-and-their-similarity-to-outcomes
#11
Nicole M Long, Hongmi Lee, Brice A Kuhl
: The hippocampus is thought to compare predicted events with current perceptual input, generating a mismatch signal when predictions are violated. However, most prior studies have only inferred when predictions occur without measuring them directly. Moreover, an important but unresolved question is whether hippocampal mismatch signals are modulated by the degree to which predictions differ from outcomes. Here, we conducted a human fMRI study in which subjects repeatedly studied various word-picture pairs, learning to predict particular pictures (outcomes) from the words (cues)...
December 14, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27806011/do-fencers-require-a-weapon-specific-approach-to-strength-and-conditioning-training
#12
Anthony N Turner, Chris Bishop, Jon Cree, Michael Edwards, Shyam Chavda, Paul Read, David Kirby
There are three types of weapon used in Olympic fencing: the épée, foil, and sabre. The aim of this study was to determine if fencers exhibited different physical characteristics across weapons. Seventy-nine male (n = 46) and female (n = 33) national standard fencers took part in this study. Fencers from each weapon (male and female), i.e., épée (n = 19 and 10), foil (n = 22 and 14), and sabre (n = 13 and 10) were (mean ± SD) 15.9 ± 0.7 years of age, 178.5 ± 7.9 cm tall, 67.4 ± 12.2 kg in mass and had 6...
October 26, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27733134/risk-factors-for-mortality-among-malnourished-hiv-infected-adults-eligible-for-antiretroviral-therapy
#13
Susannah L Woodd, Paul Kelly, John R Koethe, George Praygod, Andrea M Rehman, Molly Chisenga, Joshua Siame, Douglas C Heimburger, Henrik Friis, Suzanne Filteau
BACKGROUND: A substantial proportion of HIV-infected adults starting antiretroviral therapy (ART) in sub-Saharan Africa are malnourished. We aimed to increase understanding of the factors affecting their high mortality, particularly in the high-risk period before ART initiation. METHODS: We analysed potential risk factors for mortality of Zambian and Tanzanian participants enrolled in the NUSTART clinical trial. Malnourished adults (n = 1815; body mass index [BMI] <18...
October 12, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27722775/impairments-in-microvascular-function-and-skeletal-muscle-oxygenation-in-women-with-gestational-diabetes-mellitus-links-to-cardiovascular-disease-risk-factors
#14
Konstantina Dipla, Areti Triantafyllou, Iris Grigoriadou, Evangelia Kintiraki, Georgios A Triantafyllou, Pavlos Poulios, Ioannis S Vrabas, Andreas Zafeiridis, Stella Douma, Dimitrios G Goulis
AIMS/HYPOTHESIS: Gestational diabetes mellitus (GDM) is a risk factor for the development of endothelial dysfunction and cardiovascular disease. However, in vivo microvascular endothelial function in GDM has not been investigated. This study aimed to examine, using near-infrared spectroscopy (NIRS), whether: (1) there are differences in microvascular reactivity and skeletal muscle oxygen consumption (m[Formula: see text]) at rest and during exercise between GDM and uncomplicated pregnancies; and (2) there is an association of NIRS indices with macrovascular function and cardiovascular disease risk factors...
January 2017: Diabetologia
https://www.readbyqxmd.com/read/27659866/the-effect-of-recycled-plastics-and-cooking-oil-on-coke-quality
#15
Liséte Celina Lange, Alison Frederico Medeiros Ferreira
This study assessed the effects of adding plastics and waste vegetable oil on the quality of coke in the coking process, on a pilot scale. A typical composition of the main plastics found in municipal solid waste was prepared using 33% HDPE, 5% LDPE, 10% PP, 21% PET, 24.8% PS, 5.2% PVC, 1% cellulose and also a 0.5% waste vegetable oil was added. The wastes were added to the coal blends in the proportions of 1%, 2% and 3% for plastics and 0.5% for vegetable oil. Two types of experiments were performed. The first was carried out in a hearth heating furnace (HHF) at temperatures of up to 900°C for a 7 h period...
September 19, 2016: Waste Management
https://www.readbyqxmd.com/read/27618527/the-relationship-between-maximal-strength-and-reactive-strength
#16
Kris Beattie, Brian P Carson, Mark Lyons, Ian C Kenny
Maximum- and reactive-strength qualities both have important roles in athletic movements and sporting performance. Very little research has investigated the relationship between maximum-strength and reactive-strength. The aim of this study was to investigate the relationship between maximum-strength (isometric mid-thigh pull peak force; IMTP PF) and reactive-strength (drop-jump reactive-strength index; DJ-RSI) variables at 0.3 m, 0.4 m, 0.5 m and 0.6 m box heights. A secondary aim investigated the between- and within-group differences in reactive-strength characteristics between relatively 'strong' and 'weak' athletes...
September 6, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27571781/serum-markers-of-inflammation-and-oxidative-stress-in-sarcopenia
#17
Busra Can, Ozgur Kara, Muhammet Cemal Kizilarslanoglu, Gunes Arik, Gozde Sengul Aycicek, Fatih Sumer, Ramazan Civelek, Canan Demirtas, Zekeriya Ulger
BACKGROUND: Sarcopenia is a geriatric syndrome characterized by the presence of low muscle mass and function. Possible mechanisms underlying sarcopenia include oxidative stress and elevation of inflammatory cytokines. AIMS: The aim of the study was to evaluate the relationship between sarcopenia and biomarkers that may be involved in its pathogenesis and hence early detection. METHODS: A total of 72 patients (36 sarcopenic and 36 non-sarcopenic) were included in the study...
August 29, 2016: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/27557406/jump-training-in-youth-soccer-players-effects-of-haltere-type-handheld-loading
#18
F Rosas, R Ramirez-Campillo, D Diaz, F Abad-Colil, C Martinez-Salazar, A Caniuqueo, R Cañas-Jamet, I Loturco, F Y Nakamura, C McKenzie, J Gonzalez-Rivera, J Sanchez-Sanchez, M Izquierdo
The aim of this study was to compare the effects of a jump training program, with or without haltere type handheld loading, on maximal intensity exercise performance. Youth soccer players (12.1±2.2 y) were assigned to either a jump training group (JG, n=21), a jump training group plus haltere type handheld loading (LJG, n=21), or a control group following only soccer training (CG, n=21). Athletes were evaluated for maximal-intensity performance measures before and after 6 weeks of training, during an in-season training period...
December 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27548212/effects-of-beetroot-juice-on-recovery-of-muscle-function-and-performance-between-bouts-of-repeated-sprint-exercise
#19
Tom Clifford, Bram Berntzen, Gareth W Davison, Daniel J West, Glyn Howatson, Emma J Stevenson
This study examined the effects of beetroot juice (BTJ) on recovery between two repeated-sprint tests. In an independent groups design, 20 male, team-sports players were randomized to receive either BTJ or a placebo (PLA) (2 × 250 mL) for 3 days after an initial repeated sprint test (20 × 30 m; RST1) and after a second repeated sprint test (RST2), performed 72 h later. Maximal isometric voluntary contractions (MIVC), countermovement jumps (CMJ), reactive strength index (RI), pressure-pain threshold (PPT), creatine kinase (CK), C-reactive protein (hs-CRP), protein carbonyls (PC), lipid hydroperoxides (LOOH) and the ascorbyl free radical (A(•-)) were measured before, after, and at set times between RST1 and RST2...
August 18, 2016: Nutrients
https://www.readbyqxmd.com/read/27546478/inflammation-driven-malnutrition-a-new-screening-tool-predicts-outcome-in-crohn-s-disease
#20
Irene Jansen, Matthias Prager, Luzia Valentini, Carsten Büning
Malnutrition is a frequent feature in Crohn's disease (CD), affects patient outcome and must be recognised. For chronic inflammatory diseases, recent guidelines recommend the development of combined malnutrition and inflammation risk scores. We aimed to design and evaluate a new screening tool that combines both malnutrition and inflammation parameters that might help predict clinical outcome. In a prospective cohort study, we examined fifty-five patients with CD in remission (Crohn's disease activity index (CDAI) <200) at 0 and 6 months...
September 2016: British Journal of Nutrition
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