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Reactive strength index

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https://www.readbyqxmd.com/read/29718717/facets-of-conscientiousness-and-objective-markers-of-health-status
#1
Angelina R Sutin, Yannick Stephan, Antonio Terracciano
OBJECTIVE: To examine the association between six facets of conscientiousness (self-control, order, industriousness, traditionalism, virtue, responsibility) and objective markers of health status, including adiposity, blood markers and physical performance. DESIGN: Cross-sectional analysis of participants from the health and retirement study (N = 12,188). MAIN OUTCOME MEASURES: Adiposity (body mass index, waist circumference), blood markers (A1c, HDL cholesterol, total cholesterol, cystatin c, c-reactive protein) and physical performance (lung function, grip strength, walking speed)...
May 2, 2018: Psychology & Health
https://www.readbyqxmd.com/read/29702682/restrictive-lung-disorder-is-common-in-patients-with-kidney-failure-and-associates-with-protein-energy-wasting-inflammation-and-cardiovascular-disease
#2
Hideyuki Mukai, Pei Ming, Bengt Lindholm, Olof Heimbürger, Peter Barany, Björn Anderstam, Peter Stenvinkel, Abdul Rashid Qureshi
BACKGROUND: Cardiovascular disease (CVD), protein-energy wasting (PEW), and inflammation are common interrelated features of chronic kidney disease (CKD). Less is known about lung dysfunction in CKD and its possible role in this context. We evaluated lung function and its association with estimated glomerular filtration rate (GFR), CVD, PEW, and inflammation in individuals with normal to severely reduced GFR. METHODS: In 404 individuals with GFR category G1 (n = 31; GFR >90mL/min/1...
2018: PloS One
https://www.readbyqxmd.com/read/29702306/network-analysis-of-empathy-items-from-the-interpersonal-reactivity-index-in-1973-young-adults
#3
Giovanni Briganti, Chantal Kempenaers, Stéphanie Braun, Eiko I Fried, Paul Linkowski
The aim of this work is to perform a network analysis on the French adaptation of the interpersonal reactivity index (IRI) scale from a large Belgian database and provide additional information for the construct of empathy. We analyze a database of 1973 healthy young adults who were queried on the IRI scale. A regularized partial correlation network is estimated. In the visualization of the model, items are displayed as nodes, edges represent regularized partial correlations between the nodes. Centrality denotes a node's connectedness with other nodes in the network...
April 19, 2018: Psychiatry Research
https://www.readbyqxmd.com/read/29589412/the-validity-and-reliability-of-the-my-jump-2-app-for-measuring-the-reactive-strength-index-and-drop-jump-performance
#4
Tom Haynes, Chris Bishop, Mark Antrobus, Jon Brazier
BACKGROUND: This is the first study to independently assess the concurrent validity and reliability of the My Jump 2 app for measuring drop jump performance. It is also the first to evaluate the app's ability to measure the reactive strength index (RSI). METHODS: Fourteen male sport science students (age: 29.5 ± 9.9 years) performed three drop jumps from 20 cm and 40 cm (totalling 84 jumps), assessed via a force platform and the My Jump 2 app. Reported metrics included reactive strength index, jump height, ground contact time, and mean power...
March 27, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29570574/sequencing-effects-of-plyometric-training-applied-before-or-after-regular-soccer-training-on-measures-of-physical-fitness-in-young-players
#5
Rodrigo Ramirez-Campillo, Cristian Alvarez, Paulo Gentil, Irineu Loturco, Javier Sanchez-Sanchez, Mikel Izquierdo, Jason Moran, Fabio Y Nakamura, Helmi Chaabene, Urs Granacher
To compare the effects of short-term (i.e., 7 week) plyometric training applied before (PJT-B) or after (PJT-A) soccer practice on components of physical fitness in young soccer players, a single-blind randomized controlled trial was conducted. Post-pubertal boys aged 17.0±0.5 years were allocated to three groups: PJT-B (n=12), PJT-A (n=14), and control (CON; n=12). The outcome measures included tests to evaluate 20-m speed, standing long jump [SLJ], squat jump [SJ], countermovement jump [CMJ], and drop jump [DJ], 20-m multistage shuttle running speed [MSSRT], and Illinois change of direction speed [ICODT]...
March 22, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29527997/hand-grip-strength-is-associated-with-serum-testosterone-and-albumin-levels-in-male-kidney-transplant-recipients
#6
Bahar Gürlek Demirci, Siren Sezer, Emre Tutal, Turan Çolak, Saliha Uyanık, Mehmet Haberal
OBJECTIVES: In kidney transplant recipients, reduced muscle mass and hand-grip strength are associated with impaired nutritional status. Serum testosterone is highly associated with muscle strength in the general population. Here, we aimed to determine the associations among serum testosterone, hand-grip strength, and nutritional and inflammatory parameters, as well as graft function. MATERIALS AND METHODS: Our study included 144 stable male kidney transplant recipients from our renal transplant outpatient clinic...
March 2018: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29520075/association-between-pro-and-anti-inflammatory-cytokines-and-depressive-symptoms-in-patients-with-diabetes-potential-differences-by-diabetes-type-and-depression-scores
#7
Christian Herder, Andreas Schmitt, Florian Budden, André Reimer, Bernhard Kulzer, Michael Roden, Thomas Haak, Norbert Hermanns
Subclinical inflammation has been implicated in the development of depression, a common comorbidity of type 1 diabetes (T1D) and type 2 diabetes (T2D). This study aimed to characterise the relationships between biomarkers of inflammation and depressive symptoms in T1D and T2D. Biomarkers of inflammation were measured in serum of participants with elevated depressive symptoms and T1D (n = 389, mean age 38 years, diabetes duration 15 ± 11 years) or T2D (n = 204, mean age 56 years, diabetes duration 13 ± 8 years)...
March 9, 2018: Translational Psychiatry
https://www.readbyqxmd.com/read/29510548/analysis-of-outcomes-of-the-nutritional-status-in-patients-qualified-for-aortic-valve-replacement-in-comparison-to-healthy-elderly
#8
Edyta Wernio, Dariusz Jagielak, Jolanta Anna Dardzińska, Ewa Aleksandrowicz-Wrona, Jan Rogowski, Agnieszka Gruszecka, Sylwia Małgorzewicz
Severe aortic stenosis (AS) is associated with the reduction of muscle mass and may be associated with deterioration of nutritional status. Furthermore, malnourished cardiac patients are characterized by a higher risk of postoperative complications and mortality. The aim of this study was the evaluation and comparison of nutritional status, appetite and body composition in older people with severe aortic stenosis before aortic valve replacement and healthy elderly volunteers. One hundred and one patients, aged >65 years old with severe AS were included in the study...
March 5, 2018: Nutrients
https://www.readbyqxmd.com/read/29502530/successful-use-of-closed-loop-allostatic-neurotechnology-for-post-traumatic-stress-symptoms-in-military-personnel-self-reported-and-autonomic-improvements
#9
Catherine L Tegeler, Lee Gerdes, Hossam A Shaltout, Jared F Cook, Sean L Simpson, Sung W Lee, Charles H Tegeler
BACKGROUND: Military-related post-traumatic stress (PTS) is associated with numerous symptom clusters and diminished autonomic cardiovascular regulation. High-resolution, relational, resonance-based, electroencephalic mirroring (HIRREM®) is a noninvasive, closed-loop, allostatic, acoustic stimulation neurotechnology that produces real-time translation of dominant brain frequencies into audible tones of variable pitch and timing to support the auto-calibration of neural oscillations. We report clinical, autonomic, and functional effects after the use of HIRREM® for symptoms of military-related PTS...
December 22, 2017: Military Medical Research
https://www.readbyqxmd.com/read/29485344/kinetic-and-electromyographic-sub-phase-characteristics-with-relation-to-countermovement-vertical-jump-performance
#10
John R Harry, Max R Paquette, Brian K Schilling, Leland A Barker, C Roger James, Janet S Dufek
This study sought to identify kinetic and electromyographic (EMG) sub-phase characteristics distinguishing good from poor jumpers during countermovement vertical jumps (CMVJ), as defined by the reactive strength index (CMVJ displacement divided by jump time; RSI; cutoff=.46 m/s). Fifteen men (1.8±.6 m; 84.5±8.5 kg; 24±2 y) were stratified by RSI into good (n=6; RSI=.57±.07 m/s) and poor (n=9; RSI=.39±.06 m/s) performance groups. The following variables were compared between groups using independent t-tests (α=...
February 27, 2018: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/29462969/milk-an-effective-recovery-drink-for-female-athletes
#11
Paula Rankin, Adrian Landy, Emma Stevenson, Emma Cockburn
Milk has become a popular post-exercise recovery drink. Yet the evidence for its use in this regard comes from a limited number of investigations utilising very specific exercise protocols, and mostly with male participants. Therefore, the aim of this study was to investigate the effects of post-exercise milk consumption on recovery from a sprinting and jumping protocol in female team-sport athletes. Eighteen females participated in an independent-groups design. Upon completion of the protocol participants consumed 500 mL of milk (MILK) or 500 mL of an energy-matched carbohydrate (CHO) drink...
February 17, 2018: Nutrients
https://www.readbyqxmd.com/read/29420320/high-intensity-handgrip-training-lowers-blood-pressure-and-increases-heart-rate-complexity-among-postmenopausal-women-a-pilot-study
#12
Danielle C Bentley, Cindy H P Nguyen, Scott G Thomas
OBJECTIVE: Handgrip exercise is an emerging strategy for resting blood pressure (BP) reduction requiring minimal time and exercise effort. However, the research literature is currently limited to handgrip protocol designs predominantly prescribing sustained grip contractions, with little assessment of alternative options. Furthermore, our understanding of the utility of handgrip exercise would be strengthened by an evaluation of the physiological mechanisms driving BP reductions and an assessment of the interindividual response variability...
April 2018: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/29419713/exploration-of-the-inter-relationships-between-obesity-physical-inactivity-inflammation-and-low-back-pain
#13
Lukas E Hashem, Darren M Roffey, Abdulghader M Alfasi, Gabrielle D Papineau, Denise C Wai, Philippe Phan, Stephen P Kingwell, Eugene K Wai
STUDY DESIGN: Retrospective analysis wherein 103 patients were considered, and 76 patients were included: 49 were classified as CNSLBP (Study group) and 27 had identifiable cases of Specific Chronic LBP (Control group). OBJECTIVE: Elucidate markers of systemic inflammation in patients with chronic non-specific LBP (CNSLBP). SUMMARY OF BACKGROUND DATA: Mechanisms of low back pain (LBP) are poorly understood. Pro-inflammatory cytokines are increased in obesity and involved with pain modulation; we previously proposed a theoretical model of their mediating role in LBP...
February 6, 2018: Spine
https://www.readbyqxmd.com/read/29401202/effects-of-different-plyometric-training-frequency-on-measures-of-athletic-performance-in-prepuberal-male-soccer-players
#14
Raja Bouguezzi, Helmi Chaabene, Yassine Negra, Rodrigo Ramirez-Campillo, Zied Jlalia, Bessem Mkaouer, Younés Hachana
This study aimed to compare the effects of one vs. two sessions of equal-weekly volume plyometric training (PT) across 8 weeks on measures of athletic performance (i.e., sprint-time, change of direction [CoD], jumping ability, and muscle strength) in prepuberal male soccer players. Thirty participants were randomly assigned either to one session PT group (1SPT [n=15]) or two sessions PT group (2SPT [n=15]). Plyometric training was integrated into their regular soccer training routine. Pre- and post-training tests for the assessment of sprint-time (e...
February 1, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29401201/relationship-between-reactive-strength-index-variants-in-rugby-league-players
#15
John J McMahon, Timothy J Suchomel, Jason P Lake, Paul Comfort
Two reactive strength index (RSI) variants exist, the RSI and RSI modified (RSImod) which are typically calculated during the drop jump (DJ) and countermovement jump (CMJ), respectively. Both RSI variants have been used to monitor athletes' ability to complete stretch-shortening cycle actions quickly, but they have never been compared. The purpose of this study was to determine if they yield relatable information about reactive strength characteristics. Male professional rugby league players (n = 21, age = 20...
February 1, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29399117/observation-of-the-effect-of-physical-rehabilitation-therapy-combined-with-the-medication-on-pelvic-floor-dysfunction
#16
Wei Han, Yongmei Wang, Shengbo Qi, Tingting Li, Jiang Cao, Tinghua Zheng, Yan Su
We observed the effects of physical rehabilitation therapy combined with medication on pelvic floor dysfunction (PFD). We collected the medical records of 84 maternal patients with PFD who received treatment at the Affiliated Hospital of Hebei University between May 2015 and October 2016. These patients were randomly divided into two groups, the control group (n=42) and observation group (n=42). In the control group, patients received conventional physical rehabilitation therapy while in observation group, patients received the shixiao powder combined with siwu decoction in addition to the physical rehabilitation...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29389692/optimal-reactive-strength-index-is-it-an-accurate-variable-to-optimize-plyometric-training-effects-on-measures-of-physical-fitness-in-young-soccer-players
#17
Rodrigo Ramirez-Campillo, Cristian Alvarez, Felipe García-Pinillos, Javier Sanchez-Sanchez, Javier Yanci, Daniel Castillo, Irineu Loturco, Helmi Chaabene, Jason Moran, Mikel Izquierdo
Ramirez-Campillo, R, Alvarez, C, García-Pinillos, F, Sanchez-Sanchez, J, Yanci, J, Castillo, D, Loturco, I, Chaabene, H, Moran, J, and Izquierdo, M. Optimal reactive strength index: is it an accurate variable to optimize plyometric training effects on measures of physical fitness in young soccer players? J Strength Cond Res 32(4): 885-893, 2018-This study aimed to compare the effects of drop-jump training using a fixed drop-box height (i.e., 30-cm [FIXED]) vs. an optimal (OPT) drop-box height (i.e., 10-cm to 40-cm: generating an OPT reactive strength index [RSI]) in youth soccer players' physical fitness...
April 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29381795/the-par-index-an-indicator-reflecting-altered-vitamin-b-6-homeostasis-is-associated-with-long-term-risk-of-stroke-in-the-general-population-the-hordaland-health-study-husk
#18
Hui Zuo, Grethe S Tell, Per M Ueland, Ottar Nygård, Stein E Vollset, Øivind Midttun, Klaus Meyer, Arve Ulvik
Background: Vitamin B-6 homeostasis is altered during inflammation and immune activation. It is unknown whether altered vitamin B-6 homeostasis is associated with the risk of stroke. Objective: We investigated the relation between the ratio plasma 4-pyridoxic acid: (pyridoxal + pyridoxal-5'-phosphate) (PAr) as an indicator of altered vitamin B-6 homeostasis and the risk of stroke in the general population. Design: We conducted a prospective analysis of the community-based Hordaland Health Study (HUSK) in 6891 adults (born during 1925-1927 and 1950-1951) without known stroke at baseline (1998-1999)...
January 1, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29378035/skin-autofluorescence-arterial-stiffness-and-framingham-risk-score-as-predictors-of-clinical-outcome-in-chronic-kidney-disease-patients-a-cohort-study
#19
Hideyuki Mukai, Oskar Svedberg, Bengt Lindholm, Lu Dai, Olof Heimbürger, Peter Barany, Björn Anderstam, Peter Stenvinkel, Abdul Rashid Qureshi
Background: The risk of cardiovascular disease (CVD) is predicted by Framingham's CVD risk scores (FRS) but the high CVD-related mortality in patients with chronic kidney disease (CKD) is only partially explained by traditional CVD risk markers. Therefore, there is a need to explore whether other CVD risk markers may improve risk prediction. Although arterial stiffness measured by augmentation index (AIx) and tissue content of advanced glycation end-products (AGEs) measured by skin autofluorescence (SAF) are two biomarkers that associate with CVD and mortality in CKD, it is not known how they compare with FRS...
January 25, 2018: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/29369951/performance-differences-among-skilled-soccer-players-of-different-playing-positions-during-vertical-jumping-and-landing
#20
John R Harry, Leland A Barker, Roger James, Janet S Dufek
Harry, JR, Barker, LA, James, CR, and Dufek, JS. Performance differences among skilled soccer players of different playing positions during vertical jumping and landing. J Strength Cond Res 32(2): 304-312, 2018-Both jumping and landing performance of skilled soccer players is diminished when task demands are increased. However, it is unclear if performance changes are specific to players of certain playing positions. Therefore, we assessed jumping and landing performance among skilled soccer players of different playing positions...
February 2018: Journal of Strength and Conditioning Research
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