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Reactive strength index

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https://www.readbyqxmd.com/read/28538318/do-fencers-require-a-weapon-specific-approach-to-strength-and-conditioning-training
#1
Anthony N Turner, Chris J Bishop, Jon A Cree, Michael L Edwards, Shyam Chavda, Paul J Read, David M J Kirby
Turner, AN, Bishop, CJ, Cree, JA, Edwards, ML, Chavda, S, Read, PJ, and Kirby, DMJ. Do fencers require a weapon-specific approach to strength and conditioning training? J Strength Cond Res 31(6): 1662-1668, 2017-There are 3 types of weapons 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...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28524706/cachexia-stage-patient-generated-subjective-global-assessment-phase-angle-and-handgrip-strength-in-patients-with-gastrointestinal-cancer
#2
Gislaine Aparecida Ozorio, Katia Barão, Nora Manoukian Forones
The aim of this study was to correlate patients with gastrointestinal cancer, classified according to different stages of cancer cachexia (SCC) as proposed by Fearon, with nutritional assessment tools such as PG-SGA, phase angle (PA), and handgrip strength. One hundred one patients with a mean age of 61.8 ± 12.8 yr, with 58.4% being men were included. 32.6% were malnourished according to the body mass index (BMI). A severe or moderate malnutrition had been diagnosed in 63.3% when assessed using the PG-SGA, 60...
May 19, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28488836/effects-of-low-load-resistance-exercise-with-blood-flow-restriction-on-intramuscular-hemodynamics-oxygenation-level-and-water-content
#3
Osamu Yanagisawa, Atsuki Fukutani
BACKGROUND: Muscle metabolism during and after low-load blood flow restriction (BFR) exercise should be further investigated to clarify the mechanism by which the exercise leads to muscle hypertrophy, and increases strength and endurance. We aimed to investigate the effects of low-load resistance exercise with BFR on intramuscular hemodynamics, oxygenation level, and water content. METHODS: Seven men performed ankle plantar flexion exercise (120 repetitions, 30% one repetition maximum) using a custom-made device with and without BFR inside a magnetic resonance scanner...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28488829/analyzing-the-relationship-between-anthropometric-and-motor-indices-with-basketball-specific-pre-planned-and-non-planned-agility-performances
#4
Miran Pehar, Nedim Sisic, Damir Sekulic, Milan Coh, Ognjen Uljevic, Miodrag Spasic, Ante Krolo, Kemal Idrizovic
BACKGROUND: Although agility is an important quality in basketball, factors associated with basketball specific pre-planned-agility (change-of-direction-speed - CODS) and non- planned-agility (reactive agility - RA) are rarely investigated. The aim of this study was to evaluate relationship between anthropometric and motor indices with basketball-specific CODS and RA in male basketball players of high performance level. METHODS: We tested 88 high-level male basketball players (height: 194...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28464888/functional-disability-associated-with-disease-and-quality-of-life-parameters-in-chinese-patients-with-rheumatoid-arthritis
#5
Juan Ji, Lijuan Zhang, Qiuxiang Zhang, Rulan Yin, Ting Fu, Liren Li, Zhifeng Gu
BACKGROUND: As an important outcome measure among rheumatoid arthritis (RA) patients, functional disability may contribute to unemployment, loss of work productivity, and impaired quality of life. However, little is known about the risk factors of functional disability in Chinese RA patients. This study aimed (1) to examine the prevalence of functional disability in Chinese RA patients; (2) to explore factors associated with the health assessment questionnaire-disability index (HAQ-DI)...
May 2, 2017: Health and Quality of Life Outcomes
https://www.readbyqxmd.com/read/28448584/sarcopenia-in-patients-with-chronic-kidney-disease-not-yet-on-dialysis-analysis-of-the-prevalence-and-associated-factors
#6
Viviane Angelina de Souza, Dílmerson Oliveira, Sérgio Ribeiro Barbosa, José Otávio do Amaral Corrêa, Fernando Antônio Basile Colugnati, Henrique Novais Mansur, Natália Maria da Silva Fernandes, Marcus Gomes Bastos
INTRODUCTION: Sarcopenia is a chronic condition that is associated with aging and characterized by a reduction of muscle mass, strength, and function. Sarcopenia is prevalent in patients with chronic kidney disease (CKD) and associated with increased morbidity and mortality, as well as cardiovascular complications. OBJECTIVES: To investigate the prevalence of sarcopenia in patients with CKD not yet on dialysis and its correlation with clinical and laboratory variables and inflammatory markers...
2017: PloS One
https://www.readbyqxmd.com/read/28422586/the-reactive-strength-index-reflects-vertical-stiffness-during-drop-jumps
#7
Kristof Kipp, Michael T Kiely, Matthew D Giordanelli, Philip J Malloy, Christopher F Geiser
The reactive strength index (RSI) is often used to quantify drop jump (DJ) performance; however, not much is known about the biomechanical determinants of the RSI. The purpose of this study was to investigate the correlations between the RSI and several biomechanical variables calculated from DJ performed with different initial drop heights. Twelve, male NCAA DI basketball players performed DJ from drop heights of 30, 45, and 60 cm. Force plates were used to calculate DJ performance parameters (i.e., DJ height, contact time, and RSI) and DJ biomechanical variables (i...
April 19, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28368956/the-effect-of-varying-plyometric-volume-on-stretch-shortening-cycle-capability-in-collegiate-male-rugby-players
#8
Mark Jeffreys, Mark De Ste Croix, Rhodri S Lloyd, Jon L Oliver, Jonathan Hughes
The purpose of this study was to identify the effectiveness of low and high volume plyometric loads on developing stretch shortening cycle capability in collegiate rugby players. A between- group repeated measures design was used. Thirty six subjects (age 20.3 ±1.6 yrs, mass 91.63 ±10.36kg, stature 182.03 ±5.24cm) were randomly assigned to one of three groups, a control group (CG), a low volume plyometric group (LPG) or a high volume plyometric group (HPG). Data were collected from a force plate, and measures of reactive strength index (RSI) and leg stiffness were calculated from jump height, contact time and flight time...
March 25, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28349977/photoactive-layer-based-on-t-shaped-benzimidazole-dyes-used-for-solar-cell-from-photoelectric-properties-to-molecular-design
#9
Beibei Xu, Yuanzuo Li, Peng Song, Fengcai Ma, Mengtao Sun
Three benzimidazole-based organic dyes, possessing the same triphenylamine donors and cyanoacrylic acid acceptors with the bithiophene π-bridges combined in different nuclear positions of benzimidazole, were investigated in the utility of dye-sensitizer solar cells. The structure, molecular orbital and energy, absorption spectra and some important parameters (such as light harvesting efficiency (LHE), electron injection driving force, the electron injection time, chemical reactivity parameters, vertical dipole moment as well as interaction models of dye-I2) were obtained according to Newns-Anderson model and DFT calculation...
March 28, 2017: Scientific Reports
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
#10
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
#11
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
#12
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)...
April 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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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...
April 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
#19
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
#20
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
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