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Reactive strength index

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https://www.readbyqxmd.com/read/28339438/the-role-of-autonomic-function-in-exercise-induced-endogenous-analgesia-a-case-control-study-in-myalgic-encephalomyelitis-chronic-fatigue-syndrome-and-healthy-people
#1
Jessica Van Oosterwijck, Uros Marusic, Inge De Wandele, Lorna Paul, Mira Meeus, Greta Moorkens, Luc Lambrecht, Lieven Danneels, Jo Nijs
BACKGROUND: Patients with myalgic encephalomyelitis / chronic fatigue syndrome (ME/CFS) are unable to activate brain-orchestrated endogenous analgesia (or descending inhibition) in response to exercise. This physiological impairment is currently regarded as one factor explaining post-exertional malaise in these patients. Autonomic dysfunction is also a feature of ME/CFS. OBJECTIVES: This study aims to examine the role of the autonomic nervous system in exercise-induced analgesia in healthy people and those with ME/CFS, by studying the recovery of autonomic parameters following aerobic exercise and the relation to changes in self-reported pain intensity...
March 2017: Pain Physician
https://www.readbyqxmd.com/read/28338890/metabolic-syndrome-and-insulin-resistance-are-associated-with-frailty-in-older-adults-a-prospective-cohort-study
#2
Raúl F Pérez-Tasigchana, Luz M León-Muñoz, Esther Lopez-Garcia, Juan L Gutierrez-Fisac, Martín Laclaustra, Fernando Rodríguez-Artalejo, Pilar Guallar-Castillón
Background: diabetes increases the risk of frailty that is a leading cause of disability and premature mortality in older people. Metabolic syndrome (MS) and insulin resistance (IR) are strong risk factors for diabetes and could, thus, lead to frailty. However, the association between MS or IR and frailty has barely been investigated. Methods: data were obtained from a cohort of 1,499 community-dwelling individuals aged ≥60, who were free of diabetes at 2008-10 and were followed up for 3...
March 1, 2017: Age and Ageing
https://www.readbyqxmd.com/read/28338837/associations-of-leukocyte-telomere-length-with-aerobic-and-muscular-fitness-in-young-adults
#3
Dylan M Williams, Jessica L Buxton, Marko T Kantomaa, Tuija H Tammelin, Alexandra I F Blakemore, Marjo-Riitta Järvelin
Decline in both telomere length and physical fitness over the life course may contribute to increased risk of several chronic diseases. The relationship between telomere length and aerobic and muscular fitness is not well characterized. We examined whether there are cross-sectional associations of mean relative leukocyte telomere length (LTL) with objective measures of aerobic fitness, muscle strength, and muscle endurance, using data on 31-year-old participants of the Northern Finland Birth Cohort 1966 (n = 4,952-5,205, varying by exposure-outcome analysis)...
March 1, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28329134/dynapenic-abdominal-obesity-as-a-predictor-of-worsening-disability-hospitalization-and-mortality-in-older-adults-results-from-the-inchianti-study
#4
Andrea P Rossi, Lara Bianchi, Stefano Volpato, Stefania Bandinelli, Jack Guralnik, Mauro Zamboni, Luigi Ferrucci
Background: There are relatively few prospective studies evaluating the combined effect of abdominal obesity and low muscle strength on mortality, hospitalization, and incident disability. The aim of this study was to prospectively evaluate the prognostic value of dynapenic abdominal obesity on incident disability, hospitalization, and mortality in the population of the InCHIANTI study. Methods: In 370 men and 476 women aged between 65 and 95 years, handgrip strength, waist circumference (WC), body mass index, interleukin-6, C-reactive protein, education, medications, smoking status, and comorbidities were evaluated at the baseline...
March 8, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28321276/phase-angle-obtained-by-bioelectrical-impedance-analysis-independently-predicts-mortality-in-patients-with-cirrhosis
#5
Giliane Belarmino, Maria Cristina Gonzalez, Raquel S Torrinhas, Priscila Sala, Wellington Andraus, Luiz Augusto Carneiro D'Albuquerque, Rosa Maria R Pereira, Valéria F Caparbo, Graziela R Ravacci, Lucas Damiani, Steven B Heymsfield, Dan L Waitzberg
AIM: To evaluate the prognostic value of the phase angle (PA) obtained from bioelectrical impedance analysis (BIA) for mortality prediction in patients with cirrhosis. METHODS: In total, 134 male cirrhotic patients prospectively completed clinical evaluations and nutritional assessment by BIA to obtain PAs during a 36-mo follow-up period. Mortality risk was analyzed by applying the PA cutoff point recently proposed as a malnutrition marker (PA ≤ 4.9°) in Kaplan-Meier curves and multivariate Cox regression models...
March 8, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28316257/acute-kinematic-and-kinetic-adaptations-to-wearable-resistance-during-vertical-jumping
#6
Paul Macadam, Kim D Simperingham, John B Cronin, Grace Couture, Chloe Evison
One variation of vertical jump (VJ) training is resisted or weighted jump training, where wearable resistance (WR) enables jumping to be overloaded in a movement specific manner. A two-way analysis of variance with Bonferroni post hoc contrasts was used to determine the acute changes in VJ performance with differing load magnitudes and load placements. Kinematic and kinetic data were quantified using a force plate and contact mat. Twenty sport active subjects (age: 27.8 ± 3.8 years; body mass (BM): 70...
March 19, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28291764/delayed-effects-of-a-low-volume-power-type-resistance-exercise-session-on-explosive-performance
#7
Athanasios Tsoukos, Panagiotis Veligekas, Lee E Brown, Gerasimos Terzis, Gregory C Bogdanis
This study examined the delayed effects of a power type training session on explosive performance. Seventeen well-trained male power and team sport athletes (age: 22.7±5.5 y, height: 181±8 cm, body mass: 80.7±8.6 kg, body fat: 9.2±1.7 %, 1-RM half-squat: 163±29 kg) performed four sessions (2 experimental and 2 control) one week apart in a randomized and counterbalanced order. Explosive performance was assessed before, 24 and 48 h following a low-volume, power-type training session (5 x 4 jump squats at 40% 1RM with 3 min rest), as well as before and after 24 and 48 h of rest (control)...
January 24, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28248864/association-of-total-cholesterol-and-hdl-c-levels-and-outcome-in-coronary-heart-disease-patients-with-heart-failure
#8
Qin Zhao, Jianfei Li, Jin Yang, Rongshan Li
The aim of the study was to evaluate associations of total cholesterol (TC) and high density lipoprotein cholesterol (HDL-C) levels with prognosis in coronary heart disease (CHD) patients with heart failure (HF).Patients who were angiographical-diagnosis of CHD and echocardiographical-diagnosis of left ventricular ejection fraction (LVEF) < 45% were enrolled. Baseline characteristics were collected and association of TC and HDL-C levels with rehospitalization for HF and all-cause mortality was assessed...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28238606/comparison-of-associations-of-dxa-and-ct-visceral-adipose-tissue-measures-with-insulin-resistance-lipid-levels-and-inflammatory-markers
#9
John T Schousboe, Lisa Langsetmo, Ann V Schwartz, Brent C Taylor, Tien N Vo, Allyson M Kats, Elizabeth Barrett-Connor, Eric S Orwoll, Lynn M Marshall, Iva Miljkovic, Nancy E Lane, Kristine E Ensrud
Visceral adipose tissue (VAT) measured by computed tomography (CT) is related to insulin resistance, lipids, and serum inflammatory markers. Our objective was to compare the strength of the associations of VAT measured using dual-energy X-ray absorptiometry (DXA-VAT) and CT (CT-VAT) with insulin resistance, serum lipids, and serum markers of inflammation. For 1117 men aged 65 and older enrolled in the Osteoporotic Fractures in Men Study, the cross-sectional associations of DXA-VAT and CT-VAT with homeostasis model assessment of insulin resistance (homa2ir), C-reactive protein, and high-density lipoprotein (HDL) cholesterol were estimated with regression models and compared using a Hausman test...
February 23, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28214234/reablement-reactivation-rehabilitation-and-restorative-interventions-with-older-adults-in-receipt-of-home-care-a-systematic-review
#10
REVIEW
Joanie Sims-Gould, Catherine E Tong, Lutetia Wallis-Mayer, Maureen C Ashe
OBJECTIVE: To systematically review the impact of reablement, reactivation, rehabilitation, and restorative (4R) programs for older adults in receipt of home care services. DESIGN: Systematic review. DATA SOURCES: We searched the following electronic bibliographic databases: MEDLINE, EMBASE, PsycINFO, CINAHL (Cumulative Index to Nursing and Allied Health), SPORTDiscus and The Cochrane Library and reference lists. STUDY SELECTION: Randomized controlled trials that describe original data on the impact of home-based rehabilitative care and were written in English...
February 14, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28194004/genetic-contributions-to-self-reported-tiredness
#11
V Deary, S P Hagenaars, S E Harris, W D Hill, G Davies, D C M Liewald, A M McIntosh, C R Gale, I J Deary
Self-reported tiredness and low energy, often called fatigue, are associated with poorer physical and mental health. Twin studies have indicated that this has a heritability between 6 and 50%. In the UK Biobank sample (N=108 976), we carried out a genome-wide association study (GWAS) of responses to the question, 'Over the last two weeks, how often have you felt tired or had little energy?' Univariate GCTA-GREML found that the proportion of variance explained by all common single-nucleotide polymorphisms for this tiredness question was 8...
February 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28149403/effect-of-drop-jump-technique-on-the-reactive-strength-index
#12
Artur Struzik, Grzegorz Juras, Bogdan Pietraszewski, Andrzej Rokita
The basic drill of plyometric training aimed at improving lower limb power and jump height is a drop jump. This exercise can be performed using different techniques, which substantially affects jump variables. Therefore, the aim of this study was to compare the values of the reactive strength index (RSI) for countermovement drop jumps (CDJs) and bounce drop jumps (BDJs). The study was carried out in a group of 8 male youth basketball players. The tests were conducted using the AMTI BP600900 force plate to measure ground reaction forces and the Noraxon MyoMotion system to record kinematic data...
September 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28116570/frailty-and-reduced-physical-function-go-hand-in-hand-in-adults-with-rheumatoid-arthritis-a-us-observational-cohort-study
#13
James S Andrews, Laura Trupin, Edward H Yelin, Catherine L Hough, Kenneth E Covinsky, Patricia P Katz
Reduced physical function and health-related quality of life are common in rheumatoid arthritis (RA), and further studies are needed that examine novel determinates of reduced physical function in RA. This study examines whether frailty, a state of increased vulnerability to stressors, is associated with differences in self-reported physical function among adults with RA. Adults from a longitudinal RA cohort (n = 124) participated in the study. Using an established definition of frailty, individuals with three or more of the following physical deficits were classified as frail: (1) body mass index ≤18...
January 23, 2017: Clinical Rheumatology
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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