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https://www.readbyqxmd.com/read/28817506/maximum-distance-and-high-speed-distance-demands-by-position-in-ncaa-division-i-collegiate-football-games
#1
Gabriel J Sanders, Brad Roll, Corey A Peacock
The purpose of the study was to quantify the average and maximum distances traveled by NCAA division I football athletes during competitive games. Utilizing global positioning system (GPS) devices (Catapult Sports), total and low, moderate and high speed distances were quantified by each position. Understanding maximal workloads can enhance conditioning practice periodization protocols. A total of 40 football athletes were included in the analysis. For the data to be included, athletes were required to participate in ≥ 75% of the offensive or defensive snaps for any given game...
July 5, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28771098/physical-preparation-recommendations-for-elite-rugby-sevens-performance
#2
Jake Schuster, Dan Howells, Julien Robineau, Anthony Couderc, Alex Natera, Nick Lumley, Tim J Gabbett, Nick Winkelman
Rugby Sevens, a new Olympic sport, features high intensity intermittent running and contact efforts over short match durations, normally six times across two to three days in a tournament format. Elite Rugby Sevens seasons often include over a dozen competitive tournaments across less than nine months, demanding deliberate and careful training-stress balance and workload management alongside development of the necessary physical qualities required for competition. Focus on running and repeated power skills, strength, and match-specific conditioning capacities is advised...
August 3, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28743682/estimating-heart-rate-energy-expenditure-and-physical-performance-with-a-wrist-photoplethysmographic-device-during-running
#3
Jakub Parak, Maria Uuskoski, Jan Machek, Ilkka Korhonen
BACKGROUND: Wearable sensors enable long-term monitoring of health and wellbeing indicators. An objective evaluation of sensors' accuracy is important, especially for their use in health care. OBJECTIVE: The aim of this study was to use a wrist-worn optical heart rate (OHR) device to estimate heart rate (HR), energy expenditure (EE), and maximal oxygen intake capacity (VO2Max) during running and to evaluate the accuracy of the estimated parameters (HR, EE, and VO2Max) against golden reference methods...
July 25, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28742832/the-relationship-between-movement-speed-and-duration-during-soccer-matches
#4
Kai Roecker, Hubert Mahler, Christian Heyde, Mareike Röll, Albert Gollhofer
The relationship between the time duration of movement (t(dur)) and related maximum possible power output has been studied and modeled under many conditions. Inspired by the so-called power profiles known for discontinuous endurance sports like cycling, and the critical power concept of Monod and Scherrer, the aim of this study was to evaluate the numerical characteristics of the function between maximum horizontal movement velocity (HSpeed) and t(dur) in soccer. To evaluate this relationship, GPS data from 38 healthy soccer players and 82 game participations (≥30 min active playtime) were used to select maximum HSpeed for 21 distinct t(dur) values (between 0...
2017: PloS One
https://www.readbyqxmd.com/read/28676767/when-is-a-sprint-a-sprint-a-review-of-the-analysis-of-team-sport-athlete-activity-profile
#5
REVIEW
Alice J Sweeting, Stuart J Cormack, Stuart Morgan, Robert J Aughey
The external load of a team-sport athlete can be measured by tracking technologies, including global positioning systems (GPS), local positioning systems (LPS), and vision-based systems. These technologies allow for the calculation of displacement, velocity and acceleration during a match or training session. The accurate quantification of these variables is critical so that meaningful changes in team-sport athlete external load can be detected. High-velocity running, including sprinting, may be important for specific team-sport match activities, including evading an opponent or creating a shot on goal...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28600112/the-provision-of-medical-care-in-english-professional-football-an-update
#6
Dominic Malcolm, Andrea Scott-Bell, Ivan Waddington
OBJECTIVES: To compare the current methods of appointment, qualifications and occupational experience of club doctors and physiotherapists in English professional football with (i) those outlined in a study published in 1999, and (ii) Football Association (FA) medical regulations. DESIGN: Qualitative. METHODS: Postal questionnaire survey of (head) doctors and physiotherapists at each of the clubs in the English Premiership, Championship and Football Leagues 1 and 2...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28542091/normative-data-for-critical-speed-and-d-for-high-level-male-rugby-players
#7
Mark Kramer, Ida E Clark, Nick Jamnick, Cody Strom, Robert W Pettitt
The critical speed (CS) concept helps characterize the aerobic and anaerobic fitness of an athlete. Rugby players should hypothetically have modest CS values but extremely high curvature constant (D') values, yet, normative data are currently unavailable. To develop normative data of CS and D' for high-level male rugby players, a total of 30 male rugby players, were recruited from the Eastern Cape of South Africa. All subjects performed the running 3-min all-out exercise test (3 MT) using global positioning system (GPS) technology to determine CS and D'...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28420637/gps-urged-to-be-cautious-when-assessing-patients-fitness-for-endurance-sports
#8
Gareth Iacobucci
No abstract text is available yet for this article.
April 18, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28377134/rule-modification-in-junior-sport-does-it-create-differences-in-player-movement
#9
Paul B Gastin, Matthew D Allan, Kylie Bellesini, Michael Spittle
OBJECTIVES: To determine the effects of rule modification on player movement during matchplay in junior Australian football (AF). DESIGN: Quasi-experimental study design. METHODS: Time-motion analysis was used to record variables pertaining to player movement including total distance covered, high-speed running (HSR) distance (>14.4km/h) and HSR efforts. GPS data obtained from 145 players (7-12 years) were analysed across four junior AF leagues and three age group combinations (U8/U9, U9/U10 and U11/U12)...
March 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28255567/an-ecological-study-of-anterior-cruciate-ligament-reconstruction-part-2-functional-performance-tests-correlate-with-return-to-sport-outcomes
#10
Timothy M McGrath, Gordon Waddington, Jennie M Scarvell, Nick Ball, Rob Creer, Kevin Woods, Damian Smith, Roger Adams
BACKGROUND: Additional high-quality prospective studies are needed to better define the objective criteria used in relation to return-to-sport decisions after anterior cruciate ligament (ACL) reconstruction in active populations. PURPOSE: To investigate prospectively the relationship between functional performance test results at 24 weeks postoperative and return-to-sport activity (Tegner activity score) at 12 and 24 months, respectively, after synthetic (ligament advanced reinforcement system [LARS]) and autograft (doubled semitendinosus/gracilis [2ST/2GR]) ACL reconstructions...
February 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28253057/sport-specific-outdoor-rehabilitation-in-a-group-setting-do-the-intentions-match-actual-training-load
#11
Jeroen de Bruijn, Henk van der Worp, Mark Korte, Astrid J de Vries, Rick Nijland, Michel S Brink
CONTEXT: Previous research has shown a weak relationship between intended and actual training load in various sports. Due to variety in group and content, this relationship is expected to be even weaker during group rehabilitation. OBJECTIVE: The goal of our study was to examine the relationship between intended and actual training load during sport-specific rehabilitation in a group setting. DESIGN: Observational study. SETTING: We performed this study during three outdoor rehabilitation sessions...
March 2, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28246070/accuracy-and-adoption-of-wearable-technology-used-by-active-citizens-a-marathon-event-field-study
#12
Monika Pobiruchin, Julian Suleder, Richard Zowalla, Martin Wiesner
BACKGROUND: Today, runners use wearable technology such as global positioning system (GPS)-enabled sport watches to track and optimize their training activities, for example, when participating in a road race event. For this purpose, an increasing amount of low-priced, consumer-oriented wearable devices are available. However, the variety of such devices is overwhelming. It is unclear which devices are used by active, healthy citizens and whether they can provide accurate tracking results in a diverse study population...
February 28, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28195980/importance-reliability-and-usefulness-of-acceleration-measures-in-team-sports
#13
Jace A Delaney, Cloe J Cummins, Heidi R Thornton, Grant M Duthie
The ability to accelerate, decelerate and change direction efficiently is imperative to successful team-sports performance. Traditional intensity-based thresholds for acceleration and deceleration may be inappropriate for time-series data, and have been shown to exhibit poor reliability, suggesting other techniques may be preferable. This study assessed movement data from one professional rugby league team throughout two full seasons and one pre-season period. Using both 5 Hz and 10 Hz global positioning systems (GPS) units, a range of acceleration-based variables were evaluated for their inter-unit reliability, ability to discriminate between positions, and associations with perceived muscle soreness...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28167878/commercial-separation-systems-designed-for-preparation-of-platelet-rich-plasma-yield-differences-in-cellular-composition
#14
Ryan M Degen, Johnathan A Bernard, Kristin S Oliver, Joshua S Dines
BACKGROUND: The role of platelet-rich plasma (PRP) in the treatment of sport-related injuries is unclear, largely due to the heterogeneity of clinical results. This may relate to compositional differences in PRP from different separation systems. QUESTIONS/PURPOSES: This study aims to compare the composition of PRP produced with five different commercially available systems, focusing on cellular concentrations and pH. METHODS: Seven donors (41 ± 12 years) provided blood for PRP preparation using five systems (Arthrex Angel, Emcyte Genesis CS, Arteriocyte Magellan, Harvest SmartPrep, and Biomet GPS III)...
February 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28155786/-general-practitioners-and-physical-activity-counselling-from-evidence-to-practice-contingencies
#15
Géraldine Bloy, Laetitia Moussard Philippon, Laurent Rigal
<ce:para>Introduction: One half of the French population has an insufficient level of physical activity. General Practitioners are consi-dered to be well-placed to promote physical activity. This article analyses how they address this issue.</ce:para> <ce:para>Methods: Semi-structured interviews were conducted on preventive care with 99 GPs from the Parisian area. Their approach to physical activity counselling was discussed in greater detail with 20 GPs. The analysis identified the diverse rationales and approaches of GPs in a grounded theory perspective...
June 8, 2016: Santé Publique: Revue Multidisciplinaire Pour la Recherche et L'action
https://www.readbyqxmd.com/read/28149425/the-integration-of-internal-and-external-training-load-metrics-in-hurling
#16
Shane Malone, Dominic Doran, Ibrahim Akubat, Kieran Collins
The current study aimed to assess the relationship between the hurling player's fitness profile and integrated training load (TL) metrics. Twenty-five hurling players performed treadmill testing for VO2max, the speed at blood lactate concentrations of 2 mmol•L-1 (vLT) and 4 mmol•L-1 (vOBLA) and the heart rate-blood lactate profile for calculation of individual training impulse (iTRIMP). The total distance (TD; m), high speed distance (HSD; m) and sprint distance (SD; m) covered were measured using GPS technology (4-Hz, VX Sport, Lower Hutt, New Zealand) which allowed for the measurement of the external TL...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28051343/methodological-considerations-when-quantifying-high-intensity-efforts-in-team-sport-using-global-positioning-system-technology
#17
Matthew C Varley, Arne Jaspers, Werner F Helsen, James J Malone
Purpose Sprints and accelerations are popular performance indicators in applied sport. The methods used to define these efforts using athlete tracking technology could affect the number of efforts reported. The study aimed to determine the influence of different techniques and settings for detecting high-intensity efforts using Global Positioning System (GPS) data. Methods Velocity and acceleration data of a professional soccer match was recorded via 10-Hz GPS. Velocity data was filtered using either a median or exponential filter...
January 4, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28039429/limited-potential-of-genetic-predisposition-scores-to-predict-muscle-mass-and-strength-performance-in-flemish-caucasians-between-19-73-years-of-age
#18
Ruben Charlier, Maarten Caspers, Sara Knaeps, Evelien Mertens, Diether Lambrechts, Johan Lefevre, Martine Thomis
Since both muscle mass and strength performance are polygenic in nature, the current study compared four Genetic Predisposition Scores (GPS) in their ability to predict these phenotypes. Data were gathered within the framework of the first generation Flemish Policy Research Centre 'Sport, Physical Activity and Health' (2002-2004). Results are based on muscle characteristics data of 565 Flemish Caucasians (19-73 yr, 365 men). Skeletal muscle mass (SMM) was determined using bioelectrical impedance. The Biodex dynamometer was used to measure isometric (PTstatic120°) and isokinetic strength (PTdynamic60° and PTdynamic240°), ballistic movement speed (S20%) and muscular endurance (Work) of the knee extensors...
December 30, 2016: Physiological Genomics
https://www.readbyqxmd.com/read/28028894/attacking-22-entries-in-rugby-union-running-demands-and-differences-between-successful-and-unsuccessful-entries
#19
P Tierney, D P Tobin, C Blake, E Delahunt
Global Positioning System (GPS) technology is commonly utilized in team sports, including rugby union. It has been used to describe the average running demands of rugby union. This has afforded an enhanced understanding of the physical fitness requirements for players. However, research in team sports has suggested that training players relative to average demands may underprepare them for certain scenarios within the game. To date, no research has investigated the running demands of attacking 22 entries in rugby union...
December 28, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27806014/a-performance-analysis-of-a-stand-up-paddle-board-marathon-race
#20
AProf Ben Schram, Prof Wayne Hing, AProf Mike Climstein, AProf James Furness
Stand up paddle boarding (SUP) is a rapidly growing sport and recreational activity in which little scientific research exists. A review of the literature failed to identify a single article pertaining to the physiological demands of SUP competition. The purpose of this study was to conduct a performance analysis of a national level SUP marathon race. Ten elite SUP athletes (6 male, 4 female) were recruited from the Stand Up Paddle Surfing Association of Australia to have their race performance in the Australian Titles analyzed...
October 28, 2016: Journal of Strength and Conditioning Research
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