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https://www.readbyqxmd.com/read/28095083/physiological-capacity-and-training-routines-of-elite-cross-country-skiers-approaching-the-upper-limits-of-human-endurance
#1
Øyvind Sandbakk, Hans-Christer Holmberg
Cross-country skiing is one of the most demanding of endurance sports, involving protracted competitions on varying terrain employing a variety of skiing techniques that require upper- and/or lower-body work to different extents. Through more effective training and extensive improvements in equipment and track preparation, the speed of cross-country ski races has increased more than that of any other winter Olympic sport and, in addition, new types of racing events have been introduced. To a certain extent this has altered the optimal physiological capacity required to win and the training routines of successful skiers have evolved accordingly...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28095069/the-evolution-of-champion-cross-country-skier-training-from-lumberjacks-to-professional-athletes
#2
Øyvind Sandbakk
Competitive cross-country (XC) skiing has traditions extending back to the mid-19th century, and was included as a men's event in the first Winter Games in 1924. Since then, tremendous improvements in equipment, track preparation, and knowledge about training have prompted greater increases in XC skiing speeds than in any other Olympic sport. In response, this commentary focuses on how the training of successful XC skiers has evolved, with interviews and training data from surviving Norwegian world and Olympic XC champions as primary sources...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28095065/monitoring-fatigue-status-in-elite-team-sport-athletes-implications-for-practice
#3
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/28090147/regression-shrinkage-and-neural-models-in-predicting-the-results-of-400-metres-hurdles-races
#4
K Przednowek, J Iskra, A Maszczyk, M Nawrocka
This study presents the application of regression shrinkage and artificial neural networks in predicting the results of 400-metres hurdles races. The regression models predict the results for suggested training loads in the selected three-month training period. The material of the research was based on training data of 21 Polish hurdlers from the Polish National Athletics Team Association. The athletes were characterized by a high level of performance. To assess the predictive ability of the constructed models a method of leave-one-out cross-validation was used...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28090141/do-maximal-aerobic-power-and-blood-lactate-concentration-affect-specific-judo-fitness-test-performance-in-female-judo-athletes
#5
H Garbouj, M A Selmi, R Haj Sassi, M Haj Yahmed, K Chamari, A Chaouachi
The Special Judo Fitness Test (SJFT) has become the test most widely used by coaches and physical trainers for assessment of competitors' judo-specific physical aptitude and training programme prescription. The aim of this study was to investigate the relationship between the SJFT performance indices and both maximal aerobic power and the level of blood lactate concentrations in female judo athletes. Seventeen female judokas (age: 21.9±1.6 years, body mass: 74.6±27.4 kg, height: 164.5±8.6 cm; BMI: 27.1±8...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28086771/naturalistic-study-of-guideline-implementation-tool-use-via-evaluation-of-website-access-and-physician-survey
#6
Melissa J Armstrong, Gary S Gronseth, Richard Dubinsky, Sonja Potrebic, Rebecca Penfold Murray, Thomas S D Getchius, Carol Rheaume, Anna R Gagliardi
BACKGROUND: Clinical guidelines support decision-making at the point-of-care but the onus is often on individual users such as physicians to implement them. Research shows that the inclusion of implementation tools in or with guidelines (GItools) is associated with guideline use. However, there is little research on which GItools best support implementation by individual physicians. The purpose of this study was to investigate naturalistic access and use of GItools produced by the American Academy of Neurology (AAN) to inform future tool development...
January 13, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28065992/challenges-surrounding-return-to-play-rtp-for-the-sports-clinician-a-case-highlighting-the-need-for-a-thorough-three-step-rtp-model
#7
Roger Menta, Kevin D'Angelo
Return-to-play (RTP) is a multifactorial process of retuning an injured athlete back to competition when risk for re-injury is minimized. Traditionally, these decisions are made by medical practitioners based on experience or anecdotal evidence. RTP decisions continue to be a challenging task for the medical practitioner. In the interest of advancing sports medicine for the betterment of athletes, improving the RTP decision-making process with a new paradigm has been suggested.1 It stands to clarify the intricacies used by clinicians when making RTP decisions by providing insight into the multiple factors that must be considered; not only by the athlete and medical practitioner, but all relevant parties (i...
December 2016: Journal of the Canadian Chiropractic Association
https://www.readbyqxmd.com/read/28051335/managing-the-training-load-in-adolescent-athletes
#8
Andrew Murray
While historically adolescents were removed from their parents to prepare to become warriors, this process repeats itself in modern times but with the outcome being athletic performance. This review considers the process of developing athletes and managing load against the backdrop of differing approaches of conserving and maximizing the talent available. It acknowledges the typical training 'dose' that adolescent athletes receive across a number of sports and the typical 'response' when it is excessive or not managed appropriately...
January 4, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28033124/variances-in-strength-and-conditioning-practice-in-elite-rugby-union-between-the-northern-and-southern-hemispheres
#9
Thomas W Jones, Andrew Smith, Lindsay S Macnaughton, Duncan N French
The strength and conditioning (S&C) practices in elite Rugby Union (RU) have previously been detailed. There is also research which indicates playing styles can differ between Northern hemisphere (NH) and Southern hemisphere (SH) teams. It is not presently known if these variances in playing styles are reflected in the S&C practices of those supporting NH and SH teams. As such, the present study examines any variances in S&C practices between those supporting NH and SH elite level teams. A validated questionnaire was employed that comprised 7 sections; personal details, physical testing, strength and power development, concurrent training, unique aspects of the programme and any further relevant information regarding prescribed training programmes...
December 20, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28031772/the-chronotype-of-elite-athletes
#10
Michele Lastella, Gregory D Roach, Shona L Halson, Charli Sargent
The aims of this study were (i) to compare the chronotype distribution of elite athletes to a young adult population and (ii) to determine if there was a tendency for athletes to select and/or participate in sports which suited their chronotype. A total of 114 elite athletes from five sports (cricket, cycling, hockey, soccer and triathlon) participated in this study. The participants' chronotype, sleepiness, sleep satisfaction and sleep quality were determined using the Horne and Östberg Morningness and Eveningness questionnaire, the Epworth Sleepiness Scale and questions concerning their sleep satisfaction and quality...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28031754/assessing-reactive-strength-measures-in-jumping-and-hopping-using-the-optojump%C3%A2-system
#11
Robin Healy, Ian C Kenny, Andrew J Harrison
The aim of this study was to assess the concurrent validity of the Optojump™ system (Microgate, Bolzano, Italy) versus a force platform in the estimation of temporal and reactive strength measures. In two separate investigations, twenty physically active males performed double-leg and single-leg drop jumps from a box height of 0.3 m and a 10 s vertical bilateral hopping test. Contact time, flight time and total time (the sum of contact and flight time) were concurrently assessed during single and double-leg drop jumps and during hopping...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28030531/does-focus-of-attention-improve-snatch-lift-kinematics
#12
Kyle S Schutts, Will Wu, Anthony Vidal, Jamie Hiegel, James Becker
Recent motor control literature has demonstrated that using verbal instructions to direct a performer's attention externally (i.e. toward the movement outcome) enhances motor skill performance. The purpose of this study was to investigate how an athlete's focus of attention impacts kinematic performance of the snatch. Using a counterbalanced within-participant design, 12 competitively trained athletes (8 male, 4 female) performed 2 instructional blocks of 3 snatch repetitions at 80% of their most recent training 1RM...
December 24, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28017518/effectiveness-of-a-stress-management-pilot-program-aimed-at-reducing-the-incidence-of-sports-injuries-in-young-football-soccer-players
#13
Aurelio Olmedilla-Zafra, Victor J Rubio, Enrique Ortega, Alexandre García-Mas
OBJECTIVES: Several attempts to reduce the incidence of sport injuries using psychosocial interventions produced fruitful, although inconclusive results. This paper presents the effectiveness and implementation issues of a pilot 3-month stress-management and muscle relaxation program aimed at reducing sport injury incidence. DESIGN: Pre-post treatment-non treatment group comparison. PROGRAM ADMINISTRATION: The program was administered by a trained psychologist on a once-a-week, 1-h session basis...
September 6, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28011098/serum-igf-i-igfbp-3-and-als-concentrations-and-physical-performance-in-young-swimmers-during-a-training-season
#14
H Tourinho Filho, M Pires, E F Puggina, M Papoti, R Barbieri, C E Martinelli
INTRODUCTION: The GH/IGF-I axis is a system of growth mediators, receptors, and binding proteins that regulate somatic and tissue growth; and it has been shown that exercise programs are related to the anabolic function of this axis. OBJECTIVE: The aim of this study was to analyse the changes of serum IGF-I concentration and that of its binding proteins IGFBP-3 and ALS in adolescent swimmers at different stages of a training season, and compare them with physical performance parameters and body composition of the athletes...
December 18, 2016: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28004903/fluid-intake-behaviour-in-athletes-during-typical-training-bouts
#15
Alex Buoite Stella, Maria P Francescato, Stacy T Sims, Shawnda A Morrison
BACKGROUND: Hydration habits during training may differ depending on sports mode and individual characteristics. The aim of this study was to assess fluid intake behaviour in a wide sample of Italian athletes during their regular training. METHODS: Data on hydration habits during training were collected from a random sample of competitive athletes. Hydration strategies and personal characteristics were queried via questionnaire, including athletes' quantity and type of fluid ingested during a typical training bout, sport characteristics (e...
December 22, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27999728/from-acute-achilles-tendon-rupture-to-return-to-play-a-case-report-evaluating-recovery-of-tendon-structure-mechanical-properties-clinical-and-functional-outcomes
#16
Jennifer A Zellers, Daniel H Cortes, Karin Grävare Silbernage L
INTRODUCTION: Achilles tendon rupture results in significant functional deficits regardless of treatment strategy (surgical versus non-surgical intervention). Recovery post-rupture is highly variable, making comprehensive patient assessment critical. Assessment tools may change along the course of recovery as the patient progresses - for instance, moving from a seated heel-rise to standing heel-rise to jump testing. However, tools that serve as biomarkers for early recovery may be particularly useful in informing clinical decision-making...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27995447/ethics-nanobiosensors-and-elite-sport-the-need-for-a-new-governance-framework
#17
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
https://www.readbyqxmd.com/read/27994489/age-and-sex-related-differences-in-the-anthropometry-and-neuromuscular-fitness-of-competitive-taekwondo-athletes
#18
Pantelis Theodoros Nikolaidis, Krzysztof Buśko, Filipe Manuel Clemente, Ioannis Tasiopoulos, Beat Knechtle
Anthropometry and neuromuscular fitness have been shown to relate with taekwondo (TKD) performance; however, little information is available on the variation of these fitness components by sex and age in athletes practicing this sport. The aim of the present study was to examine the anthropometry and neuromuscular fitness of TKD athletes by sex and age. A total of 393 athletes (7-48 years old), separated into six age groups (7-9, 10-11, 12-13, 14-17, 18-32, and 33+), were examined for anthropometry and performed a series of neuromuscular fitness tests (flexibility, agility, muscle power, and isometric strength)...
2016: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/27992281/analysis-of-gauntlet-test-performance-and-injury-risk-in-intercollegiate-division-i-female-soccer-football-players-a-retrospective-study
#19
Brandon M Ness, Kory Zimney, William E Schweinle
CONTEXT: Injury risk factors and relevant assessments have been identified in women's soccer athletes. Other tests assess fitness, e.g. the Gauntlet Test (GT). However, little empirical support exists for the utility of the GT to predict time loss injury. OBJECTIVES: To examine the GT as a predictor of injury in intercollegiate Division I female soccer athletes. DESIGN: Retrospective, non-experimental descriptive cohort study. SETTING: College athletic facilities...
December 19, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27984499/effects-of-pre-exhaustion-on-the-patterns-of-muscular-activity-in-the-flat-bench-press
#20
Gołaś Artur, Maszczyk Adam, Pietraszewski Przemyslaw, Petr Stastny, Tufano James, Zając Adam
Pre-exhaustion (PE) has been applied in resistance training to manipulate the order of performing two resistance exercises, a single joint exercise to momentary exhaustion, followed by a multi-joint movement which includes the same muscle group. This method ensures greater recruitment of muscles or muscle groups in the multi-joint exercise to further increase muscle strength and overcome strength plateaus. The purpose of the present study was to investigate muscle activity by electromyography during high-intensity (95% of 1 repetition maximum) bench press (BP), before and after PE of the pectoralis major (PM), anterior deltoid (AD) and triceps brachii (TB) muscles in order to determine the effects of PE of the prime movers...
November 29, 2016: Journal of Strength and Conditioning Research
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