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Sports competition and performance

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https://www.readbyqxmd.com/read/28095065/monitoring-fatigue-status-in-elite-team-sport-athletes-implications-for-practice
#1
Robin T Thorpe, Greg Atkinson, Barry Drust, Warren Gregson
The increase in competition demands in elite team sports over recent years has prompted much attention from researchers and practitioners into the monitoring of adaptation and fatigue in athletes. Monitoring of fatigue and gaining an understanding of athlete status may also provide insights and beneficial information pertaining to player availability, injury and illness risk. Traditional methods used to quantify recovery and fatigue in team sports such as maximal physical performance assessments may not be feasible in order to detect variations in fatigue status throughout competitive periods...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28094488/effects-of-leg-contrast-strength-training-on-sprint-agility-and-repeated-change-of-direction-performance-in-male-soccer-players
#2
Mehréz Hammami, Yassine Negra, Roy J Shephard, Mohamed Souhaiel Chelly
BACKGROUND: Contrast training is popular technique among individuals who are involved in dynamic sports, having as its goal an increase in dynamic muscular performance. It is characterized by the use of high and low loads in the same strength training session. The present investigation aimed to determine the effects of adding 8--weeks of contrast strength training (CSTP) to regular soccer practice in U--17 male soccer players during the competitive season. We hypothesized that CSTP would enhance their performance...
January 17, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28081033/performance-aspects-and-physiological-responses-in-male-amateur-boxing-competitions-a-brief-review
#3
Maamer Slimani, Helmi Chaabène, Philip Davis, Emerson Franchini, Karim Chamari
Boxing is one of the most popular striking combat sports in the world. The aim of this review was to present data concerning performance analysis (time-motion and technical/tactical analysis) and physiological responses (i.e., blood lactate concentration [BLC], heart rate and/or oxygen consumption) during novice and elite male simulated and official amateur boxing competitions in any age category. The present review shows that boxing competition is a high-intensity intermittent striking combat sport. Typically, the activity-to-rest ratio was higher in elite (18:1) than novice (9:1) boxers and significant differences were observed between rounds (1 round=16:1, 2 round=8:1, and 3 round=6:1) in novice boxers...
January 4, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28080077/dogs-canis-familiaris-attention-to-human-perception-influence-of-breed-groups-and-life-experiences
#4
Marianne T E Heberlein, Dennis C Turner, Marta B Manser
Attending to the perception of others may help individuals gaining information from conspecifics, or help in competitive situations. Dogs (Canis familiaris) are attentive to humans' signals and their attentional state. We investigated whether dogs of different breed groups differ in their ability to pay attention to human's perception, first according to the genetic relatedness between dog breeds, and second according to working style differences. Once dogs had learned to leave forbidden food on the floor, they were confronted with 2 food items to which only they had unrestricted visual access...
January 12, 2017: Journal of Comparative Psychology
https://www.readbyqxmd.com/read/28068210/how-players-exploit-variability-and-regularity-of-game-actions-in-female-volleyball-teams
#5
Ana Ramos, Patrícia Coutinho, Pedro Silva, Keith Davids, Isabel Mesquita
Variability analysis has been used to understand how competitive constraints shape different behaviours in team sports. In this study, we analysed and compared variability of tactical performance indices in players within complex I at two different competitive levels in volleyball. We also examined whether variability was influenced by set type and period. Eight matches from the 2012 Olympics competition and from the Portuguese national league in the 2014-2015 season were analysed (1496 rallies). Variability of setting conditions, attack zone, attack tempo and block opposition was assessed using Shannon entropy measures...
January 9, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28067741/hypertensive-medications-in-competitive-athletes
#6
Henry Pelto
Hypertension is the most common cardiovascular disease in athletes. It is an important cause of long-term morbidity and mortality, even in a fit, athletic population. Management options to reduce these long-term risks exist that have minimal impact on athletic performance. Identification and management of underlying lifestyle factors and diseases that may lead to secondary hypertension is critical. These include substance abuse, medications, and underlying medical conditions. After evaluation and management of these issues, medications can be used to reduce blood pressure...
January 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28065996/history-of-the-royal-college-of-chiropractic-sports-sciences-canada-the-early-years
#7
John De Finney, Gordon Lawson, David Gryfe, Susan Gillis-Lawson, John P Crawford
In 1978 the Canadian Chiropractic Association recognized the need to establish an organization that would prepare chiropractors to treat athletic injuries and promote these services to sports organizations. Dr. Adrian Grice approached three chiropractors to establish such an organization. The Canadian Chiropractic Sports Academy (CCSA) was established in 1978. This was the start of the chiropractic sports movement which has seen chiropractors playing prominent roles as team doctors to professional and amateur teams and athletes and in the delivery of care at major national and international competitions...
December 2016: Journal of the Canadian Chiropractic Association
https://www.readbyqxmd.com/read/28058459/-nutritional-supplements-in-sports-sense-nonsense-or-hazard
#8
Maria Kristina Parr, Sebastian Schmidtsdorff, Annette Sophie Kollmeier
The excessive sale of dietary supplements (DSs) has become a global multi-billion market as more and more people turn to DSs for a healthy lifestyle or for aesthetic reasons. DSs are also increasingly popular among athletes; 50-85% of recreational and 35-100% of competitive athletes report taking DSs, the latter more regularly. Unless pathological deficiencies are detected, the intake of DSs for recreational athletes is not recommended. While it may be advisable for competitive athletes to supplement their diet with certain macronutrients (proteins and carbohydrates), many micronutrients (vitamins, minerals) as well as allegedly performance enhancing DSs may only show minimal impact under specific conditions and for certain sports...
January 5, 2017: Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz
https://www.readbyqxmd.com/read/28054434/in-vitro-phase-i-metabolism-of-selective-estrogen-receptor-modulators-in-horse-using-ultra-high-performance-liquid-chromatography-high-resolution-mass-spectrometry
#9
Karen Y Kwok, George H M Chan, Wai Him Kwok, Jenny K Y Wong, Terence S M Wan
Selective estrogen receptor modulators (SERMs) are chemicals that possess the anti-oestrogenic activities that are banned "in" and "out" of competition by the World Anti-Doping Agency (WADA) in human sports, and by the International Federation of Horseracing Authorities (IFHA) in horseracing. SERMs can be used as performance enhancing drugs to boost the level of androgens or to compensate for the adverse effects as a result of extensive use of androgenic anabolic steroids (AASs). SERMs have indeed been abused in human sports; hence, a similar threat can be envisaged in horseracing...
January 5, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28051829/apophyseal-and-epiphyseal-knee-injuries-in-the-adolescent-athlete
#10
P Persiani, F M Ranaldi, A Formica, M Mariani, O Mazza, M Crostelli, C Villani
OBJECTIVES: In the context of pediatric sports injuries, the epiphyseal and apophyseal knee fractures represent rather peculiar lesions. The most frequently involved anatomical area is the knee. The peculiar function of the physis and the need to preserve their integrity, makes choosing what treatment methods to employ very important. Objective of this study is to assess the kind and the effectiveness of the most suitable treatment in the apophyseal and epiphyseal knee lesions occurring in the adolescents...
November 2016: La Clinica Terapeutica
https://www.readbyqxmd.com/read/28045961/noseband-use-in-equestrian-sports-an-international-study
#11
Orla Doherty, Vincent Casey, Paul McGreevy, Sean Arkins
Nosebands are used by riders to prevent the horse from opening its mouth, to increase control and, in some cases, to comply with the competition rules. While equestrian texts traditionally recommend that two adult human fingers should be able to fit under a fastened noseband, noseband tightness levels are not, in general, regulated in competition. Possible detrimental consequences for the horse, of excessively tight nosebands, include discomfort, pain or tissue damage. The current study investigated noseband usage in equestrian competition...
2017: PloS One
https://www.readbyqxmd.com/read/28031765/physical-performance-during-water-polo-matches-the-effect-of-the-players-competitive-level
#12
Petros G Botonis, Argyris G Toubekis, Theodoros I Platanou
The purpose of the study was to compare playing intensity and performance changes within a water-polo match in players of different competitive levels. High-level (n = 7) and lower-level (n = 7) players performed a progressively increasing speed test of 5 x 200 m swimming and speed corresponding to lactate concentration of 4.0, 5.0 and 10.0 mmol•l-1 was calculated. Repeated sprint ability (8 x 20 m) was tested at pre-, the middle and post-match and a 400 m swimming test was completed at pre and post in five water-polo matches...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28028569/functional-testing-and-return-to-sport-following-stabilization-surgery-for-recurrent-lateral-patellar-instability-in-competitive-athletes
#13
Aaron J Krych, Michael P O'Malley, Nick R Johnson, Rohith Mohan, Timothy E Hewett, Michael J Stuart, Diane L Dahm
PURPOSE: Medial patellofemoral ligament (MPFL) reconstruction and tibial tubercle osteotomy are commonly used to treat recurrent lateral patellar instability, yet there are limited available data on return to sport (RTS) following these procedures. The purpose of this study is to evaluate patient factors associated with excellent functional outcomes, including successful RTS, following surgical stabilization including MPFL reconstruction in competitive athletes with recurrent lateral patellar instability...
December 27, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28028062/cardiovascular-effects-of-performance-enhancing-drugs
#14
André La Gerche, Maria J Brosnan
Exercise and competitive sports should be associated with a wide range of health benefits with the potential to inspire a positive community health legacy. However, the reputation of sports is being threatened by an ever-expanding armamentarium of agents with real or perceived benefits in performance enhancement. In addition to the injustice of unfair advantage for dishonest athletes, significant potential health risks are associated with performance-enhancing drugs. Performance-enhancing drugs may have an effect on the cardiovascular system by means of directly altering the myocardium, vasculature, and metabolism...
January 3, 2017: Circulation
https://www.readbyqxmd.com/read/28007336/the-combined-frequency-of-igf-and-myostatin-polymorphism-among-track-field-athletes-and-swimmers
#15
Sigal Ben-Zaken, Yoav Meckel, Dan Nemet, Alon Eliakim
OBJECTIVE: The IGF C-1245T (rs35767) and the myostatin (MSTN) Lys(K)-153Arg(R) genetic polymorphism may influence skeletal muscle phenotypes and athletic performance. Carrying the minor IGF T allele and the myostatin rare R allele was associated with higher circulating IGF-I levels, greater muscle mass and improved performance. The aim of the present study was to assess the combined frequency of the IGF 1245T (rs35767) and MSTN 153Arg(R) polymorphism among Israeli track and field athletes (n=111) and swimmers (n=80)...
December 15, 2016: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28005635/longitudinal-body-composition-changes-in-ncaa-division-i-college-football-players
#16
Eric T Trexler, Abbie E Smith-Ryan, J Bryan Mann, Pat A Ivey, Katie R Hirsch, Meredith G Mock
Trexler, ET, Smith-Ryan, AE, Mann, JB, Ivey, PA, Hirsch, KR, and Mock, MG. Longitudinal body composition changes in NCAA Division I college football players. J Strength Cond Res 31(1): 1-8, 2017-Many athletes seek to optimize body composition to fit the physical demands of their sport. American football requires a unique combination of size, speed, and power. The purpose of the current study was to evaluate longitudinal changes in body composition in Division I collegiate football players. For 57 players (mean ± SD, age = 19...
January 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27999926/results-of-arthroscopic-treatment-in-unresolved-osgood-schlatter-disease-in-athletes
#17
Esra Circi, Tahsin Beyzadeoglu
AIM OF THE STUDY: In this study we aimed to determine outcomes following arthroscopic ossicle excision in athletes with unresolved Osgood-Schlatter disease (OSD). METHOD: Arthroscopy was performed on 11 patients (11 knees) with OSD between September 2008 and November 2014. Surgical treatment inclusion criteria were determined as: failure of conservative treatment; isolated pain over the tibial tubercle and distal patellar tendon; pain limiting sporting performance at a competitive level...
December 21, 2016: International Orthopaedics
https://www.readbyqxmd.com/read/27999719/immediate-effects-of-deep-trunk-muscle-training-on-swimming-start-performance
#18
Satoshi Iizuka, Atsushi Imai, Keisuke Koizumi, Keisuke Okuno, Koji Kaneoka
BACKGROUND: In recent years, deep trunk muscle training has been adopted in various sports, including swimming. This is performed both in everyday training and as part of the warm-up routine before competitive races. It is suggested that trunk stabilization exercises are effective in preventing injury, and aid in improving performance. However, conclusive evidence of the same is yet to be obtained. The time of start phase of swimming is a factor that can significantly influence competition performance in a swimming race...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27996996/-ecg-for-non-competitive-sports-in-childhood-strengths-and-disputes
#19
Elena Poggi, Alessandro Giannattasio, Sara Bolloli, Andrea Beccaria, Paola Mezzano, Paola Rocca, Cecilia Del Vecchio
BACKGROUND: Sport is very important for health promotion and conservation. Active lifestyle and regular exercise reduce cardiovascular disease incidence. The Italian Ministry of Health issued the Law Decree no. 243 (10/18/2014) concerning "guidelines for certification about non-competitive sports" to promote safety in sports. This regulation defines the activities for which a certificate is required, the professional actors involved and the clinical exams to be performed according to the patient's health status...
November 2016: Giornale Italiano di Cardiologia
https://www.readbyqxmd.com/read/27995447/ethics-nanobiosensors-and-elite-sport-the-need-for-a-new-governance-framework
#20
Robert Evans, Michael McNamee, Owen Guy
Individual athletes, coaches and sports teams seek continuously for ways to improve performance and accomplishment in elite competition. New techniques of performance analysis are a crucial part of the drive for athletic perfection. This paper discusses the ethical importance of one aspect of the future potential of performance analysis in sport, combining the field of biomedicine, sports engineering and nanotechnology in the form of 'Nanobiosensors'. This innovative technology has the potential to revolutionise sport, enabling real time biological data to be collected from athletes that can be electronically distributed...
December 19, 2016: Science and Engineering Ethics
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