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Reactive strength index modified

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
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
Mateusz Barczewski, Danuta Matykiewicz, Jacek Andrzejewski, Katarzyna Skórczewska
The aim of this study was to produce isotactic polypropylene based composites filled with waste thermosetting bulk moulded composite (BMC). The influence of BMC waste addition (5, 10, 20 wt%) on composites structure and properties was investigated. Moreover, additional studies of chemical treatment of the filler were prepared. Modification of BMC waste by calcium stearate (CaSt) powder allows to assess the possibility of the production of composites with better dispersion of the filler and more uniform properties...
May 2016: Journal of Advanced Research
Kristof Kipp, Michael T Kiely, Christopher F Geiser
The purpose of this study was to investigate the validity of the reactive strength index modified (RSImod) as a measure of lower body explosiveness. Fifteen female, National Collegiate Athletic Association Division I volleyball players performed vertical countermovement jumps (CMJs) while standing on a force plate. Each player performed 3 CMJs. The vertical ground reaction forces collected during each jump were used to calculate jump height, time to take-off, time to peak force, peak force, peak rate of force development, and peak power; the latter 3 variables were all normalized to body mass...
May 2016: Journal of Strength and Conditioning Research
Timothy J Suchomel, Christopher J Sole, Michael H Stone
The purpose of this study was to compare 4 methods that assess the lower-body stretch-shortening cycle (SSC) utilization of athletes. Eighty-six National Collegiate Athletic Association Division I athletes from 6 different sports performed 2 squat jumps and 2 countermovement jumps on a force platform. Pre-stretch augmentation percentage (PSAP), eccentric utilization ratio (EUR), and reactive strength (RS) for jump height (JH) and peak power (PP) magnitudes, and reactive strength index-modified (RSImod) were calculated for each team...
February 2016: Journal of Strength and Conditioning Research
Liane Correia-Costa, Ana Cristina Santos, Milton Severo, António Guerra, Franz Schaefer, Alberto Caldas Afonso, Henrique Barros, Ana Azevedo
OBJECTIVE: To evaluate the association between obesity indices and blood pressure (BP) at 4 years of age, in each sex, and to quantify to which extent this association is mediated by inflammation and insulin resistance (IR). MATERIALS AND METHODS: We studied 1250 4-year-old children selected from the population-based birth cohort Generation XXI. Associations between body mass index (BMI) z-score and waist-to-height ratio (WHtR), office BP, inflammation (high sensitivity C-reactive protein) and IR (HOMA-IR index) were assessed...
2015: PloS One
Timothy J Suchomel, Christopher J Sole, Christopher A Bailey, Jacob L Grazer, George K Beckham
The purpose of this study was to examine the differences in reactive strength index-modified (RSImod), jump height (JH), and time to takeoff (TTT) between 6 U.S. collegiate sport teams. One hundred six male and female Division I collegiate athletes performed unloaded (<1 kg) and loaded (20 kg) countermovement jumps as part of an ongoing athlete monitoring program. Reactive strength index-modified, JH, and TTT values for each team were compared using 1-way analysis of variance. Statistically significant differences in RSImod (p < 0...
May 2015: Journal of Strength and Conditioning Research
Timothy J Suchomel, Christopher A Bailey, Christopher J Sole, Jacob L Grazer, George K Beckham
The purposes of this study included examining the reliability of reactive strength index-modified (RSImod), the relationships between RSImod and force-time variables, and the differences in RSImod between male and female collegiate athletes. One hundred six Division I collegiate athletes performed unloaded and loaded countermovement jumps (CMJs). Intraclass correlation coefficients and typical error expressed as a coefficient of variation were used to establish the relative and absolute reliability of RSImod, respectively...
April 2015: Journal of Strength and Conditioning Research
D T T Huynh, A A Devitt, C L Paule, B R Reddy, P Marathe, R A Hegazi, F J Rosales
BACKGROUND: Hospital malnutrition is a significant problem that still remains under-recognised and under-treated in India. The present study assessed the effects of oral nutritional supplementation (ONS) in conjunction with dietary counselling versus dietary counselling (control) alone in malnourished patients when given in hospital and post-hospital discharge. METHODS: The present study was conducted in nine private and four public hospitals. Patients from various medical wards were screened for malnutrition using modified Subjective Global Assessment (mSGA) and randomised to control (n = 106) or ONS (n = 106) for 12 weeks...
August 2015: Journal of Human Nutrition and Dietetics: the Official Journal of the British Dietetic Association
David Jiménez-Pavón, María A Sesé, Jara Valtueña, Magdalena Cuenca-García, Marcela González-Gross, Frederic Gottrand, Anthony Kafatos, Yannis Manios, Kurt Widhalm, Stefaan de Henauw, Angela Polito, Faustino R Pérez-López, Luis A Moreno
The purpose of this study was to identify the relevance of a set of risk factors for insulin resistance in adolescents from Europe and to consider their possible gender-specific associations. The Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study (HELENA-CSS) was conducted in 1053 European adolescents (mean age, 14.9 years) in a school setting in 9 countries. Three anthropometric markers of body fat and a dietary index were calculated. Total energy intake was estimated from a questionnaire...
May 2014: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Brett D Owens, Scot E Campbell, Kenneth L Cameron
BACKGROUND: While posterior glenohumeral instability is becoming increasingly common among young athletes, little is known of the risk factors for injury. PURPOSE: To determine the modifiable and nonmodifiable risk factors for posterior shoulder instability in a high-risk cohort. STUDY DESIGN: Case-control study (prognosis); Level of evidence, 2. METHODS: A prospective cohort study in which 714 young athletes were followed from June 2006 through May 2010 was conducted...
November 2013: American Journal of Sports Medicine
Marcos Antonio Eleutério-Silva, Lucas José Sá da Fonseca, Elizabeth P P Velloso, Glaucevane da Silva Guedes, Walkyria O Sampaio, Weriton Ferreira da Silva, Marco Antonio Mota-Gomes, Lucy V da Silva Lima, Robson Augusto S Santos, Luiza A Rabelo
OBJECTIVE: To evaluate the impact of a short-term cardiovascular physical programme on the metabolic, anthropometric and oxidative stress parameters of women with metabolic syndrome. METHODS: Thirty sedentary female patients, age range 30-60 years, were invited to participate in a 6-week cardiovascular physical programme. The training consisted of 60-min sessions of aerobic and strength exercises performed 3 times a week; a total of 18 sessions. Anthropometric data, functional exercise capacity, general biochemical profile, serum lipid peroxidation, superoxide dismutase and catalase activity in erythrocytes were evaluated according to standardized protocols...
June 2013: Journal of Rehabilitation Medicine
Ulrike Müller, Yae Matsuo, Maximilian Lauber, Claudia Walther, Andreas Oberbach, Gerhard Schuler, Volker Adams
BACKGROUND: The noninvasive measurement of endothelial function is a very powerful tool to assess cardiovascular disease. Especially in children this is not an easy task, and therefore an easy method like the Endo-Pat device is helpful. Due to the still existing uncertainties of the validity of endothelial measurement by the Endo-PAT device in children, we thought to analyze the correlation between endothelial functional measurement by Endo-PAT, and the capability of HDL to modify nitric oxide (NO) production by phosphorylation of endothelial nitric oxide synthase at the stimulatory site (Ser(1177)) and the inhibitory site (Thr(495))...
May 2013: Metabolism: Clinical and Experimental
Christian Raschner, Hans-Peter Platzer, Carson Patterson, Inge Werner, Reinhard Huber, Carolin Hildebrandt
BACKGROUND: Epidemiological studies have shown a high incidence of anterior cruciate ligament (ACL) injuries among competitive alpine skiers. Little is known regarding modifiable risk factors in young skiers. There are still uncertainties in gender-related risk factors. OBJECTIVE: The purpose of this study was to determine the relationship between ACL injuries and internal risk factors. METHODS: Retrospective data analyses were performed based on a group of 175 female and 195 male alpine ski racers between the ages of 14 and 19 years...
December 2012: British Journal of Sports Medicine
Stefano Balducci, Silvano Zanuso, Patrizia Cardelli, Laura Salvi, Giulia Mazzitelli, Alessandra Bazuro, Carla Iacobini, Antonio Nicolucci, Giuseppe Pugliese
OBJECTIVE: Physical fitness is inversely related to mortality in the general population and in subjects with type 2 diabetes. Here, we present data concerning the relationship between changes in physical fitness and modifiable cardiovascular risk factors in subjects with type 2 diabetes from the Italian Diabetes and Exercise Study. RESEARCH DESIGN AND METHODS: Sedentary patients with type 2 diabetes (n = 606) were enrolled in 22 outpatient diabetes clinics and randomized to twice-a-week supervised aerobic and resistance training plus exercise counseling versus counseling alone for 12 months...
June 2012: Diabetes Care
Daren K Heyland, Rupinder Dhaliwal, Xuran Jiang, Andrew G Day
INTRODUCTION: To develop a scoring method for quantifying nutrition risk in the intensive care unit (ICU). METHODS: A prospective, observational study of patients expected to stay > 24 hours. We collected data for key variables considered for inclusion in the score which included: age, baseline APACHE II, baseline SOFA score, number of comorbidities, days from hospital admission to ICU admission, Body Mass Index (BMI) < 20, estimated % oral intake in the week prior, weight loss in the last 3 months and serum interleukin-6 (IL-6), procalcitonin (PCT), and C-reactive protein (CRP) levels...
2011: Critical Care: the Official Journal of the Critical Care Forum
Bożena Targońska-Stępniak, Maria Majdan
INTRODUCTION: In patients with rheumatoid arthritis (RA), the loss of body cell mass is observed, known as rheumatoid cachexia. Cachexia is associated with increased morbidity and premature mortality of RA patients. OBJECTIVES: The aim of the study was to assess the effect of chronic inflammation and disease activity on nutritional status in RA patients. PATIENTS AND METHODS: In 140 patients with RA (111 women, 29 men), RA activity was measured using the Disease Activity Score in 28 joints (DAS28) and using the Modified Health Assessment Questionnaire (M-HAQ)...
April 2011: Polskie Archiwum Medycyny Wewnętrznej
William P Ebben, Erich J Petushek
The ability to develop force quickly is a requisite ability in most sports. The reactive strength index (RSI) has been developed as a measure of explosive strength and is derived by evaluating jump height divided by ground contact time during the depth jump (DJ). At present, the RSI is typically used to evaluate DJ performance, because it is the only plyometric exercise with an identifiable ground contact time. The purpose of this study was to introduce a modification of the RSI (RSImod) that can be used to evaluate the explosive power of any vertical plyometric exercise...
August 2010: Journal of Strength and Conditioning Research
Fumio Komatsu, Yasuo Kagawa, Terue Kawabata, Yoshinori Kaneko, Baatar Purvee, Jugder Otgon, Ulziiburen Chimedregzen
Mongolians are known to have relatively short life expectancy. In order to examine the role of dietary habits in the early aging of Mongolians, the food intake inquiry, anthropometric measurements and blood clinical tests were performed for 365 healthy inhabitants in Murun, a northern Mongolia city, and compared to those of Japanese. Murun inhibitants were found to have a characteristic dietary habit of taking large amounts of meat, milk, dairy products and wheat flour products, in contrast little vegetables, fruits and fishes...
July 2008: Current Aging Science
Tomo Onishi, Kazunori Shimada, Satoshi Sunayama, Hirotoshi Ohmura, Takahiro Sumide, Yoshiyuki Masaki, Kosuke Fukao, Miho Nishitani, Atsumi Kume, Hiroyuki Sato, Hisashi Naito, Sachio Kawai, Atsushi Amano, Hiroyuki Daida
BACKGROUND: Cardiac rehabilitation (CR) has numerous beneficial effects, including the modification of coronary risk factors and improvement of the prognosis, in patients with coronary artery disease (CAD). Limited data are available regarding the effects of CR on the physical status and risk factors in patients with metabolic syndrome (MetS) after coronary artery bypass grafting (CABG). METHODS AND RESULTS: We enrolled 32 patients with MetS after CABG, who participated in a supervised CR program for 6 months...
June 2009: Journal of Cardiology
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