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https://www.readbyqxmd.com/read/28527679/salivary-steroid-response-and-competitive-anxiety-in-elite-basketball-players-effect-of-opponent-level
#1
Ademir F S Arruda, Marcelo S Aoki, Ana Carolina Paludo, Alexandre Moreira
This study examined the effect of playing matches against different opponent teams (hard match; HM, medium match; MM, and easy match; EM) on pre-match testosterone concentration (T), pre-to-post match cortisol (C) concentration, and pre-competitive anxiety (CSAI-2 questionnaire) in 20 elite male basketball players. One training session (TS) was also assessed (control condition). Saliva steroids were determined by ELISA. The pre-T concentration was significantly lower for the TS (163±54pmolL(-1)), compared to the three official matches (EM: 208±82pmolL(-1), MM: 213±57pmolL(-1), and HM: 218±37pmolL(-1)) (p<0...
May 17, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28507521/prime-time-light-exposures-do-not-seem-to-improve-maximal-physical-performance-in-male-elite-athletes-but-enhance-end-spurt-performance
#2
Raphael Knaier, Juliane Schäfer, Anja Rossmeissl, Christopher Klenk, Henner Hanssen, Christoph Höchsmann, Christian Cajochen, Arno Schmidt-Trucksäss
Many sports competitions take place during television prime time, a time of the day when many athletes have already exceeded their time of peak performance. We assessed the effect of different light exposure modalities on physical performance and melatonin levels in athletes during prime time. Seventy-two young, male elite athletes with a median (interquartile range) age of 23 (21; 29) years and maximum oxygen uptake (VO2max) of 63 (58; 66) ml/kg/min were randomly assigned to three different light exposure groups: bright light (BRIGHT), blue monochromatic light (BLUE), and control light (CONTROL)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28504066/the-association-of-recreational-and-competitive-running-with-hip-and-knee-osteoarthritis-a-systematic-review-and-meta-analysis
#3
Eduard Alentorn-Geli, Kristian Samuelsson, Volker Musahl, Cynthia L Green, Mohit Bhandari, Jón Karlsson
Study Design Systematic review and meta-analysis. Background Running is a healthy and popular activity worldwide, but data regarding its association with osteoarthritis (OA) are conflicting. Objectives To evaluate the association of hip and knee OA with running and to explore the influence of running intensity on this association. Methods PubMed, EMBASE and Cochrane Library databases were used to identify studies investigating the occurrence of OA of the hip and/or knee among runners. Studies comparing this occurrence between runners and controls (sedentary, non-running individuals) were meta-analyzed...
May 13, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28503527/postactivation-potentiation-in-elite-young-soccer-players
#4
Adriano Titton, Emerson Franchini
The aim of this study was to investigate the acute effects of 16 different combinations to cause the postactivation potentiation (PAP) in elite young soccer players. Squat exercise in 4 different intensities (40%, 60%, 80%, and 100% one-repetition maximum [1RM]) was performed and its effects were evaluated in the performance of countermovement jump (CMJ), after 4 different recovery times (1, 3, 5, and 10 min). For this purpose, 25 young soccer players, underwent five experimental sessions. At the first session the control to determine 1RM in half-squat was carried out...
April 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28498985/hiv-antibodies-detect-hiv-persistence-and-low-level-viral-replication
#5
Sheila M Keating, Christopher D Pilcher, Vivek Jain, Mila Lebedeva, Dylan Hampton, Mohamed Abdel-Mohsen, Xutao Deng, Gary Murphy, Alex Welte, Shelley N Facente, Frederick Hecht, Steven G Deeks, Satish K Pillai, Michael P Busch
BACKGROUND: HIV antibodies are generated and maintained by ongoing systemic expression of HIV antigen. We investigated whether HIV antibody responses as measured by high-throughput quantitative and qualitative assays could be used to indirectly measure persistent HIV replication in individuals on antiretroviral therapy (ART). METHODS: HIV antibody measurements were made over time on and off suppressive ART and were compared to measures of HIV reservoir size and expression of anti-viral restriction factors...
May 11, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28497113/toward-a-cure-does-host-immunity-play-a-role
#6
Jielin Zhang, Clyde S Crumpacker
Three decades of research on human immunodeficiency virus (HIV) and AIDS reveal that the human body has developed through evolution a genome immune system embodying epigenetic regulation against pathogenic nucleic acid invasion. In HIV infection, this epigenetic regulation plays a cardinal role in HIV RNA production that silences HIV transcription at a molecular (RNA) level, controls viral load at a cellular (biological) level, and governs the viremic stage of AIDS at the clinical (patient) level. Even though the human genome is largely similar among humans and HIV is a single viral species, human hosts show significant differences in viral RNA levels, ranging from cell to organ to individual and expressed as elite controllers, posttreatment controllers, and patients with AIDS...
March 2017: MSphere
https://www.readbyqxmd.com/read/28493955/molecular-diversity-analysis-drought-related-marker-traits-association-mapping-and-discovery-of-excellent-alleles-for-100-day-old-plants-by-est-ssrs-in-cassava-germplasms-manihot-esculenta-cranz
#7
Bin Wang, Xin Guo, Pingjuan Zhao, Mengbin Ruan, Xiaoling Yu, Liangping Zou, Yiling Yang, Xiao Li, Deli Deng, Jixiang Xiao, Yiwei Xiao, Chunji Hu, Xue Wang, Xiaolin Wang, Wenquan Wang, Ming Peng
Cassava is the third largest food crop of the world and has strong ability of drought tolerance. In order to evaluate the molecular diversity and to discover novel alleles for drought tolerance in cassava germplasms, we examined a total of 107 abiotic stress related expressed sequence tags-simple sequence repeat (EST-SSR) markers in 134 cassava genotypes coming from planting regions worldwide and performed drought related marker-traits association mapping. As results, we successfully amplified 98 of 107 markers in 97 polymorphic loci and 279 alleles, with 2...
2017: PloS One
https://www.readbyqxmd.com/read/28486329/effect-of-short-term-coenzyme-q10-supplementation-and-pre-cooling-on-serum-endogenous-antioxidant-enzymes-of-elite-swimmers
#8
Ali Emami, Asghar Tofighi, Siamak A Rezayi, Behnaz B Gilani
This study aimed to investigate the effect of the use of a two-week pre-cooling strategy and supplementation coenzyme Q10 (CoQ10) on superoxide dismutase (SOD), catalase (CAT), and serum glutathione peroxidase (GPx) in elite, adolescent swimmers during heavy and regular trainings and recording of freestyle swimming. 36 healthy males (mean ± SD; age: 17.5±1.1, body fat content: 14.55±1.75%) were randomly selected and divided into four groups of CoQ10 (300 mg/d), precooling (immersion in the water at 18 ± 0...
May 5, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28481383/amount-of-minutes-played-does-not-contribute-to-anterior-cruciate-ligament-injury-in-national-basketball-association-athletes
#9
Kelechi R Okoroha, Kojo Marfo, Fabien Meta, Robert Matar, Ramsy Shehab, Terry Thompson, Vasilios Moutzouros, Eric C Makhni
There is limited information on the potential risk factors for sustaining an anterior cruciate ligament (ACL) tear in National Basketball Association (NBA) athletes. This study evaluated 83 NBA players who sustained an ACL injury between 1984 and 2015 to determine the influence of minutes played on injury risk. Minutes played in the injury game, during the season, and over their career were assessed, along with the ability to return to play, player efficiency rating, and playing time after return. Athletes in the NBA played significantly fewer minutes before sustaining an ACL injury (17...
May 8, 2017: Orthopedics
https://www.readbyqxmd.com/read/28476362/editorial-commentary-core-muscle-injuries-or-athletic-pubalgia-finally-the-real-sausage-not-just-the-same-ole-baloney
#10
EDITORIAL
William C Meyers
In their paper "Prevalence of Surgical Repair for Athletic Pubalgia and Impact on Performance in Football Athletes Participating in the National Football League Combine," Knapik et al. cut through the baloney in the literature on "sports hernia" and apply new eyes to the impact of the results of core muscle surgery on young elite athletes trying out for the National Football League (NFL). They found that the players who had surgery did just as well as all the others in and following NFL Combines. Even the players with presumptively residual, MRI findings did well...
May 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28469706/impact-of-rav1-engineering-on-poplar-biomass-production-a-short-rotation-coppice-field-trial
#11
Alicia Moreno-Cortés, José Manuel Ramos-Sánchez, Tamara Hernández-Verdeja, Pablo González-Melendi, Ana Alves, Rita Simões, José Carlos Rodrigues, Mercedes Guijarro, Isabel Canellas, Hortensia Sixto, Isabel Allona
BACKGROUND: Early branching or syllepsis has been positively correlated with high biomass yields in short-rotation coppice (SRC) poplar plantations, which could represent an important lignocellulosic feedstock for the production of second-generation bioenergy. In prior work, we generated hybrid poplars overexpressing the chestnut gene RELATED TO ABI3/VP1 1 (CsRAV1), which featured c. 80% more sylleptic branches than non-modified trees in growth chambers. Given the high plasticity of syllepsis, we established a field trial to monitor the performance of these trees under outdoor conditions and a SRC management...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28468877/preservation-of-peripheral-t-follicular-helper-cell-function-in-hiv-controllers
#12
Supranee Buranapraditkun, Franco Pissani, Jeffrey E Teigler, Bruce T Schultz, Galit Alter, Mary Marovich, Merlin L Robb, Michael A Eller, Jeff Martin, Steven Deeks, Nelson L Michael, Hendrik Streeck
The maturation process of high-affinity antibodies is a result of intricate interactions between B cells and follicular helper T (Tfh) cells occurring in lymphoid germinal centers. HIV infection induces significant chronic immune activation, phenotypic skewing, and inflammation driven by years of continuous viral replication. High levels of viremia as well as immune activation and dysfunction have been demonstrated to have a perturbing impact on the B cell memory compartment and contribute to B cell exhaustion...
May 3, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28468255/using-tri-axial-accelerometry-in-daily-elite-swim-training-practice
#13
Sander Ganzevles, Rik Vullings, Peter Jan Beek, Hein Daanen, Martin Truijens
Background: Coaches in elite swimming carefully design the training programs of their swimmers and are keen on achieving strict adherence to those programs by their athletes. At present, coaches usually monitor the compliance of their swimmers to the training program with a stopwatch. However, this measurement clearly limits the monitoring possibilities and is subject to human error. Therefore, the present study was designed to examine the reliability and practical usefulness of tri-axial accelerometers for monitoring lap time, stroke count and stroke rate in swimming...
April 29, 2017: Sensors
https://www.readbyqxmd.com/read/28467486/the-effect-of-ingenol-b-on-the-suppressive-capacity-of-elite-suppressor-hiv-specific-cd8-t-cells
#14
Abena K Kwaa, Kennedy Goldsborough, Victoria E Walker-Sperling, Luiz F Pianowski, Lucio Gama, Joel N Blankson
BACKGROUND: Some latency-reversing agents (LRAs) inhibit HIV-specific CD8+ T cell responses. In a prior study of protein kinase C (PKC) agonists, we found that bryostatin-1 inhibited elite controller/suppressor (ES) CD8+ T cell suppressive activity whereas prostratin had no effect. Ingenol-B is another PKC agonist with potent LRA activity both by itself and in combination with the bromodomain inhibitor JQ1; however its effect on CD8+ T cell mediated control of HIV-1 replication is unknown...
2017: PloS One
https://www.readbyqxmd.com/read/28464889/highly-divergent-patterns-of-genetic-diversity-and-evolution-in-proviral-quasispecies-from-hiv-controllers
#15
Suwellen S D de Azevedo, Diogo Gama Caetano, Fernanda H Côrtes, Sylvia L M Teixeira, Karina Dos Santos Silva, Brenda Hoagland, Beatriz Grinsztejn, Valdilea G Veloso, Mariza G Morgado, Gonzalo Bello
BACKGROUND: Ongoing intra-host HIV-1 evolution has been shown in individuals that naturally suppress the viremia to low levels (HIV controllers) by the analysis of the RNA in plasma compartment. Detection of evolution at the DNA proviral compartment in HIV controllers, however, has been more challenging and the precise correlation between the systemic viral suppression level and rate of reservoir's reseeding in those individuals is not fully understood. In this sense, we examined the proviral DNA quasispecies by single genome amplification of the env gene in a cohort of 23 HIV controllers from Brazil, divided in three groups, according to the level of systemic viral suppression: (1) elite controllers with persistent undetectable viral load (PEC, n = 6); (2) elite controllers with occasional episodes of transient (51-400 copies/mL) viremia (EEC, n = 7); and (3) viremic controllers with persistent low-level (80-2000 copies/mL) viremia (VC, n = 10)...
May 2, 2017: Retrovirology
https://www.readbyqxmd.com/read/28459350/positive-effects-of-augmented-feedback-to-reduce-time-on-ground-in-well-trained-runners
#16
Rahel Gilgen-Ammann, Thomas Wyss, Severin Troesch, Louis Heyer, Wolfgang Taube
PURPOSE: Successful elite sprint to long-distance runners are known to have shorter ground contact times (GCT) than their less successful counterparts. The purpose of this study was to investigate whether augmented feedback (aF) about GCT can reduce the time on ground (TOG) per minute in long-distance runners and if so, whether this reduction improves running performance. METHODS: Thirty well-trained runners were allocated to three groups. The intervention group (IG) received visual aF about their GCT during eight high-intensity interval sessions in the 4-week training period and were instructed to minimize GCT...
May 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28459281/self-managed-exercises-strength-and-fitness-training-and-multifidus-muscle-size-in-elite-footballers
#17
Julie A Hides, Jazmin Walsh, Melinda M Franettovich Smith, M Dilani Mendis
CONTEXT:   Low back pain (LBP) and lower limb injuries are common among Australian Football League (AFL) players. Smaller size of 1 key trunk muscle, the lumbar multifidus (MF), has been associated with LBP and injuries in footballers. The size of the MF muscle has been shown to be modifiable with supervised motor-control training programs. Among AFL players, supervised motor-control training has also been shown to reduce the incidence of lower limb injuries and was associated with increased player availability for games...
May 1, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28457670/implications-of-altered-autonomic-control-on-sports-performance-in-athletes-with-spinal-cord-injury
#18
REVIEW
Sebastian Cruz, Cheri A Blauwet
It is well known that athletes with spinal cord injury (SCI) may experience altered autonomic physiology that impacts their exercise capacity and sports performance. This is particularly relevant given the ever-increasing number of individuals with SCI who are actively engaged in sports at all levels, from community-based adaptive sports to elite Paralympic competitions. As such, the purpose of this article is to review the present literature regarding the implications of altered autonomic control on the safety and performance of athletes with SCI...
April 4, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28452832/shoulder-dynamic-control-ratio-and-rotation-range-of-motion-in-female-junior-elite-handball-players-and-controls
#19
Robert van Cingel, Bas Habets, Linn Willemsen, Bart Staal
OBJECTIVE: To compare glenohumeral range of motion and shoulder rotator muscle strength in healthy female junior elite handball players and controls. DESIGN: Cross-sectional case-control study. SETTING: Sports medical center. PARTICIPANTS: Forty elite female handball players and 30 controls active in nonoverhead sports participated in this study. MAIN OUTCOME MEASURES: Passive external rotator (ER), internal rotator (IR), and total range of motion (TROM) of the dominant and nondominant arm were examined with a goniometer...
April 27, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28452146/autonomic-testing-for-prediction-of-competition-performance-in-paralympic-athletes
#20
Jordan W Squair, Aaron A Phillips, Katharine D Currie, Cameron Gee, Andrei V Krassioukov
PURPOSE: While we now appreciate that autonomic dysfunction can impact Wheelchair Rugby performance, this is currently not being assessed during classification, largely due to lack of a standardized and evidence-based strategy to assess autonomic function. Our aim, therefore, was to establish the optimal autonomic testing protocol that best predicts cardiovascular capacity during competition by comprehensively examining autonomic function in elite Wheelchair Rugby athletes with cervical SCI and thereby enhance the standardized classification...
April 27, 2017: Scandinavian Journal of Medicine & Science in Sports
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