scholarly journals Relationship Between Preseason Training Load and In-Season Availability in Elite Australian Football Players

2017 ◽  
Vol 12 (6) ◽  
pp. 749-755 ◽  
Author(s):  
Nick B. Murray ◽  
Tim J. Gabbett ◽  
Andrew D. Townshend
Keyword(s):  
Global Positioning System ◽  
Repeated Measures ◽  
Football Players ◽  
Injury Incidence ◽  
Gps Technology ◽  
Risk Of Injury ◽  
Australian Football League ◽  
Global Positioning ◽  
Australian Football ◽  
The Relationship

Objectives:To investigate the relationship between the proportion of preseason training sessions completed and load and injury during the ensuing Australian Football League season.Design:Single-cohort, observational study.Methods:Forty-six elite male Australian football players from 1 club participated. Players were divided into 3 equal groups based on the amount of preseason training completed (high [HTL], >85% sessions completed; medium [MTL], 50–85% sessions completed; and low [LTL], <50% sessions completed). Global positioning system (GPS) technology was used to record training and game loads, with all injuries recorded and classified by club medical staff. Differences between groups were analyzed using a 2-way (group × training/competition phase) repeated-measures ANOVA, along with magnitude-based inferences. Injury incidence was expressed as injuries per 1000 h.Results:The HTL and MTL groups completed a greater proportion of in-season training sessions (81.1% and 74.2%) and matches (76.7% and 76.1%) than the LTL (56.9% and 52.7%) group. Total distance and player load were significantly greater during the first half of the in-season period for the HTL (P = .03, ES = 0.88) and MTL (P = .02, ES = 0.93) groups than the LTL group. The relative risk of injury for the LTL group (26.8/1000 h) was 1.9 times greater than that for the HTL group (14.2/1000 h) (χ2 = 3.48, df = 2, P = .17).Conclusions:Completing a greater proportion of preseason training resulted in higher training loads and greater participation in training and competition during the competitive phase of the season.

Quantifying the Gap Between Under 18 and Senior AFL Football: 2003 and 2009

2012 ◽  
Vol 7 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Darren Burgess ◽  
Geraldine Naughton ◽  
Kevin Norton
Keyword(s):  
Global Positioning System ◽  
Evidence Base ◽  
Positioning System ◽  
Movement Rate ◽  
Ball Speed ◽  
Gps Technology ◽  
Australian Football League ◽  
Global Positioning ◽  
Australian Football ◽  
Over Time

Purpose:The understanding of the gap between Under 18 y (U18) and senior-level competition and the evolution of this gap in Australian Football lack a strong evidence base. Despite the multimillion dollars invested in recruitment, scientific research on successful transition is limited. No studies have compared individual players’ movement rate, game statistics and ball speed in U18 and senior competition of the Australian Football League across time. This project compared differences in player movement and ball speed between matches from senior AFL competitive matches and U18 players in the 2003 and 2009 seasons.Methods:TrakPerformance Software and Global Positioning System (GPS) technology were used to analyze the movement of players, ball speed and game statistics. ANOVA compared the two levels of competition over time.Results:Observed interactions for distance traveled per minute of play (P = .009), number of sprints per minute of play (P < .001), time spent at sprint speed in the game (P < .001), time on field (P < .001), and ball speed (P < .001) were found. Subsequent analysis identified increases in movement patterns in senior AFL competition in 2009 compared with the same level of competition in 2003 and U18 players in 2003 and 2009.Conclusions:Senior AFL players in 2009 were moving further, sprinting relatively more frequently, playing less time and playing at game speeds significantly greater than the same senior competition in 2003 as well as compared with both cohorts of U18 players.

scholarly journals Training Load and Carbohydrate Periodization Practices of Elite Male Australian Football Players: Evidence of Fueling for the Work Required

2020 ◽  
Vol 30 (4) ◽  
pp. 280-286 ◽  
Author(s):  
Harry E. Routledge ◽  
Stuart Graham ◽  
Rocco Di Michele ◽  
Darren Burgess ◽  
Robert M. Erskine ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Training Session ◽  
Football Players ◽  
Total Distance ◽  
Practice Elements ◽  
Physical Loading ◽  
Global Positioning ◽  
Australian Football ◽  
Food Diaries ◽  
And Training

The authors aimed to quantify (a) the periodization of physical loading and daily carbohydrate (CHO) intake across an in-season weekly microcycle of Australian Football and (b) the quantity and source of CHO consumed during game play and training. Physical loading (via global positioning system technology) and daily CHO intake (via a combination of 24-hr recall, food diaries, and remote food photographic method) were assessed in 42 professional male players during two weekly microcycles comprising a home and away fixture. The players also reported the source and quantity of CHO consumed during all games (n = 22 games) and on the training session completed 4 days before each game (n = 22 sessions). The total distance was greater (p < .05) on game day (GD; 13 km) versus all training days. The total distance differed between training days, where GD-2 (8 km) was higher than GD-1, GD-3, and GD-4 (3.5, 0, and 7 km, respectively). The daily CHO intake was also different between training days, with reported intakes of 1.8, 1.4, 2.5, and 4.5 g/kg body mass on GD-4, GD-3, GD-2, and GD-1, respectively. The CHO intake was greater (p < .05) during games (59 ± 19 g) compared with training (1 ± 1 g), where in the former, 75% of the CHO consumed was from fluids as opposed to gels. Although the data suggest that Australian Football players practice elements of CHO periodization, the low absolute CHO intakes likely represent considerable underreporting in this population. Even when accounting for potential underreporting, the data also suggest Australian Football players underconsume CHO in relation to the physical demands of training and competition.

scholarly journals Monitoring cattle behavior and pasture use with GPS and GIS

2000 ◽  
Vol 80 (3) ◽  
pp. 405-413 ◽  
Author(s):  
L.W. Turner ◽  
M.C. Udal ◽  
B. T. Larson ◽  
S.A. Shearer
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Global Positioning System ◽  
Precision Agriculture ◽  
Geographic Information ◽  
Spatial And Temporal Variability ◽  
Positioning System ◽  
Gps Technology ◽  
Global Positioning ◽  
Livestock Behavior

Precision agriculture is already being used commercially to improve variability management in row crop agriculture. In the same way, understanding how spatial and temporal variability of animal, forage, soil and landscape features affect grazing behavior and forage utilization provides potential to modify pasture management, improve efficiency of utilization, and maximize profits. Recent advances in global positioning system (GPS) technology have allowed the development of lightweight GPS collar receivers suitable for monitoring animal position at 5-min intervals. The GPS data can be imported into a geographic information system (GIS) to assess animal behavior characteristics and pasture utilization. This paper describes application and use of GPS technology on intensively managed beef cattle, and implications for livestock behavior and management research on pasture. Key words: Livestock behavior, electronics, grazing, forage, global positioning system, geographic information system

scholarly journals Design an attendance system using Global Positioning System (GPS) technology at PT. Cipta Anugrah Musi

2021 ◽  
Vol 2 (2) ◽  
pp. 104-124
Author(s):  
Muhammad Faisal
Keyword(s):  
Monitoring System ◽  
Global Positioning System ◽  
Black Box ◽  
Positioning System ◽  
Gps Technology ◽  
Global Positioning ◽  
Black Box Testing ◽  
Employee Attendance

The purpose of this research is to design an attendance system using Global Positioning System (GPS) technology, as a useful solution. At PT. Cipta Anugrah Musi for the marketing staff to still be able to do attendance without using a fingerprint attendance machine. Based on the results of research and discussion on the marketing employee attendance monitoring system in the form of this android mobile, the following conclusions can be drawn. From the black box testing that has been done, it can be concluded that the employee attendance monitoring system can run well and there are no problems. GPS technology can provide information on where to take employee photos so that it is easy to find out the position of the employee's absence at that time to avoid cheating in attendance.

A Pedestrian Navigation System Using Cellular Phone Video-Conferencing Functions

2012 ◽  
Vol 2012 ◽  
pp. 1-8
Author(s):  
Akihiko Sugiura ◽  
Takuya Shoji
Keyword(s):  
Global Positioning System ◽  
Video Conferencing ◽  
Cellular Phone ◽  
Positioning System ◽  
Cellular Phones ◽  
Gps Technology ◽  
Pedestrian Navigation ◽  
Global Positioning ◽  
Positional Precision ◽  
Subterranean Environment

A user’s position-specific field has been developed using the Global Positioning System (GPS) technology. To determine the position using cellular phones, a device was developed, in which a pedestrian navigation unit carries the GPS. However, GPS cannot specify a position in a subterranean environment or indoors, which is beyond the reach of transmitted signals. In addition, the position-specification precision of GPS, that is, its resolution, is on the order of several meters, which is deemed insufficient for pedestrians. In this study, we proposed and evaluated a technique for locating a user’s 3D position by setting up a marker in the navigation space detected in the image of a cellular phone. By experiment, we verified the effectiveness and accuracy of the proposed method. Additionally, we improved the positional precision because we measured the position distance using numerous markers.

An exploratory investigation into the reception of verbal and video feedback provided to players in an Australian Football League club

2020 ◽  
pp. 174795412095108
Author(s):  
Robert J Mason ◽  
Damian Farrow ◽  
John AC Hattie
Keyword(s):  
Video Feedback ◽  
Learner Characteristics ◽  
Less Is More ◽  
Test Feedback ◽  
Australian Football League ◽  
Moderating Factors ◽  
Exploratory Investigation ◽  
Australian Football ◽  
The Impact ◽  
The Relationship

Coach observation studies commonly examine training and competition environments, with little attention paid to the ways in which coaches provide video feedback in a performance analysis setting. In addition, few studies have considered the reception of feedback by an athlete, or the characteristics of the athlete that may support or hinder feedback reception. The purposes of this study were threefold. First, to examine the characteristics of feedback provided by a coach during a typical video feedback meeting. Second, to measure the impact of this feedback on athlete learning. Third, to consider a range of learner characteristics that may impact feedback reception. Six coaches and six players affiliated with an Australian Football League (AFL) club were recruited. Coach-player dyads were observed in one-to-one video feedback meetings following a game played in the 2017 season. Players were interviewed to test feedback recall. Players also completed a series of tests designed to measure learner characteristics, with the intention of discovering moderating factors of the relationship between feedback and learning outcomes. Rates of feedback generally mirrored those found in previous studies. Coaches provided nearly 30 feedback messages during each meeting. Players recalled 50% of summarised feedback messages but just 6% of all feedback a week later. A ceiling effect on learner characteristics was observed. The paper presents a novel design for examining feedback effectiveness while considering learner characteristics. Given the findings on feedback quantity and recall, coaches are encouraged to adopt a ‘less is more’ approach to providing feedback.

scholarly journals Physical Demands of Top-Class Soccer Friendly Matches in Relation to a Playing Position Using Global Positioning System Technology

2015 ◽  
Vol 47 (1) ◽  
pp. 179-188 ◽  
Author(s):  
Javier Mallo ◽  
Esteban Mena ◽  
Fabio Nevado ◽  
Víctor Paredes
Keyword(s):  
Global Positioning System ◽  
High Intensity ◽  
Positioning System ◽  
Physical Demands ◽  
Gps Technology ◽  
Total Distance ◽  
Professional Soccer ◽  
Global Positioning ◽  
Rate Profile ◽  
Very High

AbstractThe aim of this study was to examine the physical demands imposed on professional soccer players during 11-a-side friendly matches in relation to their playing position, using global positioning system (GPS) technology. One hundred and eleven match performances of a Spanish “La Liga” team during the 2010-11 and 2011-12 pre-seasons were selected for analysis. The activities of the players were monitored using GPS technology with a sampling frequency of 1 Hz. Total distance covered, distance in different speed categories, accelerations, and heart rate responses were analyzed in relation to five different playing positions: central defenders (n=23), full-backs (n=20), central midfielders (n=22), wide midfielders (n=26), and forwards (n=20). Distance covered during a match averaged 10.8 km, with wide and central midfielders covering the greatest total distance. Specifically, wide midfielders covered the greatest distances by very high-intensity running (>19.8 km·h-1) and central midfielders by jogging and running (7.2-19.7 km·h-1). On the other hand, central defenders covered the least total distance and at high intensity, although carried out more (p<0.05-0.01) accelerations than forwards, wide midfielders, and fullbacks. The work rate profile of the players obtained with the GPS was very similar to that obtained with semi-automatic image technologies. However, when comparing results from this study with data available in the literature, important differences were detected in the amount of distance covered by sprinting, which suggests that caution should be taken when comparing data obtained with the GPS with other motion analysis systems, especially regarding high-intensity activities.

Assessment and Training of Visuomotor Reaction Time for Football Injury Prevention

2017 ◽  
Vol 26 (1) ◽  
pp. 26-34 ◽  
Author(s):  
Gary B. Wilkerson ◽  
Kevin A. Simpson ◽  
Ryan A. Clark
Keyword(s):  
Reaction Time ◽  
Outcome Measures ◽  
Repeated Measures ◽  
Injury Risk ◽  
Football Players ◽  
Injury Incidence ◽  
Training Methods ◽  
Characteristic Analysis ◽  
Cut Point ◽  
And Training

Context:Neurocognitive reaction time has been associated with musculoskeletal injury risk, but visuomotor reaction time (VMRT) derived from tests that present greater challenges to visual stimulus detection and motor response execution may have a stronger association.Objective:To assess VMRT as a predictor of injury and the extent to which improvement may result from VMRT training.Design:Cohort study.Setting:University athletic performance center.Participants:76 National Collegiate Athletic Association Division-I FCS football players (19.5 ± 1.4 y, 1.85 ± 0.06 m, 102.98 ± 19.06 kg).Interventions:Preparticipation and postseason assessments. A subset of players who exhibited slowest VMRT in relation to the cohort’s postseason median value participated in a 6-wk training program.Main Outcome Measures:Injury occurrence was related to preparticipation VMRT, which was represented by both number of target hits in 60 s and average elapsed time between hits (ms). Receiver operating characteristic analysis identified the optimum cut point for a binary injury risk classification. A nonparametric repeated-measures analysis of ranks procedure was used to compare posttraining VMRT values for slow players who completed at least half of the training sessions (n = 15) with those for untrained fast players (n = 27).Results:A preparticipation cut point of ≤85 hits (≥705 ms) discriminated injured from noninjured players with odds ratio = 2.30 (90% confidence interval, 1.05–5.06). Slow players who completed the training exhibited significant improvement in visuomotor performance compared with baseline (standardized response mean = 2.53), whereas untrained players exhibited a small performance decrement (group × trial interaction effect, L2 = 28.74; P < .001).Conclusions:Slow VMRT appears to be an important and modifiable injury risk factor for college football players. More research is needed to refine visuomotor reaction-time screening and training methods and to determine the extent to which improved performance values can reduce injury incidence.

Accuracy of a Global Positioning System (GPS) for Weed Mapping

1997 ◽  
Vol 11 (4) ◽  
pp. 782-786 ◽  
Author(s):  
Theodore M. Webster ◽  
John Cardina
Keyword(s):  
Measurement Error ◽  
Global Positioning System ◽  
Patch Size ◽  
Positioning System ◽  
Weed Mapping ◽  
Global Positioning ◽  
The Relationship

Experiments were conducted to test the accuracy of a global positioning system (GPS) in measuring the area of simulated weed patches of varying size and to determine the accuracy in navigating back to particular points in a field. Circular areas of 5, 50, and 500 m2 were established and measured using point and polygon features of a GPS. The GPS estimations of the area of those patches had errors ranging from 7 to 45%, 6 to 15%, and 3 to 6%, respectively, when compared to actual measurements. As patch size increased, errors decreased. A curve describing the relationship between GPS error and patch size had an excellent fit (r2 = 0.92). The error remained the same in all measurements across all patch sizes, but composed a smaller percentage of large patches. The GPS had submeter accuracy in navigation to the correct quadrat 73% of the time, located the correct quadrat 27% of the time, and invariably navigated to within 1.58 m of the correct quadrat. The relationship between patch size and measurement error was applied to natural infestations of hemp dogbane.

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