scholarly journals Match Demands of Women’s Collegiate Soccer

Sports ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 87
Author(s):  
Andrew R. Jagim ◽  
Jason Murphy ◽  
Alexis Q. Schaefer ◽  
Andrew T. Askow ◽  
Joel A. Luedke ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Global Positioning System ◽  
National Collegiate Athletic Association ◽  
Ncaa Division Iii ◽  
Fat Free Mass ◽  
Movement Kinematics ◽  
Division Iii ◽  
Match Play ◽  
High Speeds ◽  
Global Positioning

Research describing the match and specific positional demands during match play in women’s collegiate soccer is limited. The purpose of the study was to quantify the match demands of National Collegiate Athletic Association (NCAA) Division III soccer and assess position differences in movement kinematics, heart rate (HR), and energy expenditure. Twenty-five Division III women soccer players (height: 1.61 ± 0.3 m; body mass: 66.7 ± 7.5 kg; fat-free mass: 50.3 ± 6.5 kg; body fat%: 25.6 ± 5.1%) were equipped with a wearable global positioning system to assess the demands of 22 matches throughout a season. Players were categorized by position (goal keepers (GK), center defenders (CB), flank players (FP), forwards (F), and center midfielders (CM)). Players covered 9807 ± 2588 m and 1019 ± 552 m at high speeds (>249.6 m·m−1), with an overall average speed of 62.85 ± 14.7 m·m−1. This resulted in a mean HR of 74.2 ± 6% HR max and energy expenditure of 1259 ± 309 kcal. Significant and meaningful differences in movement kinematics were observed across position groups. CM covered the most distance resulting in the highest training load. FP covered the most distance at high speeds and mean HR values were highest in CM, CB, and FP positions.

scholarly journals Seasonal Accumulated Workloads in Collegiate Women’s Soccer: A Comparison of Starters and Reserves

2022 ◽  
Vol 7 (1) ◽  
pp. 11
Author(s):  
Andrew R. Jagim ◽  
Andrew T. Askow ◽  
Victoria Carvalho ◽  
Jason Murphy ◽  
Joel A. Luedke ◽  
...  
Keyword(s):  
Body Fat ◽  
Inertial Sensors ◽  
Ncaa Division Iii ◽  
Training Load ◽  
Fat Free Mass ◽  
Division Iii ◽  
Positioning Systems ◽  
Global Positioning ◽  
Playing Time ◽  
One Way Anova

Research quantifying the unique workload demands of starters and reserves in training and match settings throughout a season in collegiate soccer is limited. Purpose: The purpose of the current study is to compare accumulated workloads between starters and reserves in collegiate soccer. Methods: Twenty-two NCAA Division III female soccer athletes (height: 1.67 ± 0.05 m; body mass: 65.42 ± 6.33 kg; fat-free mass: 48.99 ± 3.81 kg; body fat %: 25.22 ± 4.78%) were equipped with wearable global positioning systems with on-board inertial sensors, which assessed a proprietary training load metric and distance covered for each practice and 22 matches throughout an entire season. Nine players were classified as starters (S), defined as those playing >50% of playing time throughout the entire season. The remaining 17 were reserves (R). Goalkeepers were excluded. A one-way ANOVA was used to determine the extent of differences in accumulated training load throughout the season by player status. Results: Accumulated training load and total distance covered for starters were greater than reserves ((S: 9431 ± 1471 vs. R: 6310 ± 2263 AU; p < 0.001) and (S: 401.7 ± 31.9 vs. R: 272.9 ± 51.4 km; p < 0.001), respectively) throughout the season. Conclusions: Starters covered a much greater distance throughout the season, resulting in almost double the training load compared to reserves. It is unknown if the high workloads experienced by starters or the low workloads of the reserves is more problematic. Managing player workloads in soccer may require attention to address potential imbalances that emerge between starters and reserves throughout a season.

scholarly journals Complex Terrain Load Carriage Energy Expenditure Estimation Using Global Positioning System Devices

2018 ◽  
Vol 50 (10) ◽  
pp. 2145-2149 ◽  
Author(s):  
ADAM W. POTTER ◽  
WILLIAM R. SANTEE ◽  
STEPHEN P. MULLEN ◽  
ANTHONY J. KARIS ◽  
LAURIE A. BLANCHARD ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Global Positioning System ◽  
Complex Terrain ◽  
Load Carriage ◽  
Positioning System ◽  
Global Positioning

The running performance and estimated energy cost of hurling specific small-sided games

2016 ◽  
Vol 11 (6) ◽  
pp. 853-858 ◽  
Author(s):  
Shane Malone ◽  
Kieran D Collins ◽  
Dominic A Doran
Keyword(s):  
Energy Expenditure ◽  
Global Positioning System ◽  
High Speed ◽  
Training Data ◽  
Metabolic Power ◽  
Mean Velocity ◽  
Pitch Dimension ◽  
Global Positioning ◽  
Equivalent Distance ◽  
Very High

The current study examined the extent to which pitch dimensions can influence the physical and estimated energetic demands of hurling small-sided games. Training data ( n = 990) were collected from 24 (age 25.5 ± 3.2 years; height 178.9 ± 3.2 cm; body mass 78.5 ± 4.5 kg) hurling players using 4-Hz global positioning system technology (VX Sport, Lower Hutt, New Zealand). Total distance (m), high-speed running distance (m; ≥ 17 km/h), very high-speed running distance (m; ≥ 22 km/h), total accelerations ( n), acceleration distance (m), peak and mean velocity (km/h) were considered. In addition changes in velocity were analysed by assessing the acceleration actions during SSG. This allowed for the assessment of estimated energy expenditure (kJ/kg) and the equivalent distance covered a different metabolic power thresholds. The main findings show that traditional speed-based data increased as pitch dimensions were increased ( p = 0.002; d = 4.53 ± 0.46; very large). Furthermore, as relative player area increased there was an increase in estimated energy expenditure ( p = 0.004; d = 2. 16 ± 0.20; very large) and average metabolic power metrics ( p = 0.002; d = 1.13 ± 0.46; moderate). Distances covered at metabolic power categories (TP) increased with small-sided games pitch dimension ( p = 0.002; d = 0.3 ± 0.06; small). The study enables coaches to better understand the physical demands imposed on players during specific hurling small-sided games pitch dimensions, and highlights that traditional speed-based data underestimate the running demands of small-sided games.

Repeated High-Intensity-Effort Activity in Elite and Semielite Rugby League Match Play

2015 ◽  
Vol 10 (6) ◽  
pp. 711-717 ◽  
Author(s):  
Georgia M. Black ◽  
Tim J. Gabbett
Keyword(s):  
Global Positioning System ◽  
Effect Size ◽  
High Intensity ◽  
Recovery Time ◽  
System Analysis ◽  
Rugby League ◽  
Positioning System ◽  
Match Play ◽  
Global Positioning

Purpose:No study has investigated the frequency and nature of repeated high-intensity-effort (RHIE) bouts across elite and semielite rugby league competitions. This study examined RHIE activity in rugby league match play across playing standards.Participants:36 elite and 64 semielite rugby league players.Methods:Global positioning system analysis was completed during 17 elite and 14 semielite matches.Results:The most commonly occurring RHIE bouts involved 2 efforts (2-RHIE) for both elite and semielite players. Only small differences were found in 2-RHIE activity between elite and semielite match play (effect size [ES] ≥0.31 ± 0.15, ≥88%, likely). RHIE bouts were more likely to involve contact as the number of efforts in a bout increased (ES ≥0.40 ± 0.15, 100%, almost certainly). Semielite players performed a greater proportion of 2-contact-effort RHIE bouts than their elite counterparts (68.2% vs 60.6%, ES 0.33 ± 0.15, 92%, likely), while elite players performed a greater proportion of 3-effort bouts (26.9% vs 21.1%, ES 0.31 ± 0.15, 88%, likely). Elite players also had a shorter recovery (1.00−3.99 vs ≥4.00 min) between RHIE bouts (ES ≥1.60 ± 0.71, ≥94%, likely).Conclusion:These findings highlight the RHIE demands of elite and semielite rugby league match play. Elite players are more likely to perform RHIE bouts consisting of 3 efforts and to have a shorter recovery time between bouts. Exposing players to these RHIE demands in training is likely to improve their ability to tolerate the most demanding passages of match play.

scholarly journals Measuring slope to improve energy expenditure estimates during field-based activities

2013 ◽  
Vol 38 (3) ◽  
pp. 352-356 ◽  
Author(s):  
Glen E. Duncan ◽  
Jonathan Lester ◽  
Sean Migotsky ◽  
Lisa Higgins ◽  
Gaetano Borriello
Keyword(s):  
Energy Expenditure ◽  
Global Positioning System ◽  
Technical Note ◽  
Positioning System ◽  
Global Positioning ◽  
Improved Accuracy ◽  
Activity Energy

This technical note describes methods to improve activity energy expenditure estimates by using a multi-sensor board (MSB) to measure slope. Ten adults walked over a 4-km (2.5-mile) course wearing an MSB and mobile calorimeter. Energy expenditure was estimated using accelerometry alone (base) and 4 methods to measure slope. The barometer and global positioning system methods improved accuracy by 11% from the base (p < 0.05) to 86% overall. Measuring slope using the MSB improves energy expenditure estimates during field-based activities.

Establishing Duration-Specific Running Intensities From Match-Play Analysis in Rugby League

2015 ◽  
Vol 10 (6) ◽  
pp. 725-731 ◽  
Author(s):  
Jace A. Delaney ◽  
Tannath J. Scott ◽  
Heidi R. Thornton ◽  
Kyle J.M. Bennett ◽  
David Gay ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Average Method ◽  
Moving Average ◽  
Rugby League ◽  
Positioning System ◽  
Time Curve ◽  
Match Play ◽  
Global Positioning ◽  
Play Analysis

Rugby league coaches often prescribe training to replicate the demands of competition. The intensities of running drills are often monitored in comparison with absolute match-play measures. Such measures may not be sensitive enough to detect fluctuations in intensity across a match or to differentiate between positions.Purpose:To determine the position- and duration-specific running intensities of rugby league competition, using a moving-average method, for the prescription and monitoring of training.Methods:Data from a 15-Hz global positioning system (GPS) were collected from 32 professional rugby league players across a season. The velocity–time curve was analyzed using a rolling-average method, where maximum values were calculated for 10 different durations, 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10 min, for each player across each match.Results:There were large differences between the 1- and 2-min rolling averages and all other rolling-average durations. Smaller differences were observed for rolling averages of greater duration. Fullbacks maintained a greater velocity than outside backs and middle and edge forwards over the 1- and 2-min rolling averages (ES 0.8−1.2, P < .05). For rolling averages 3 min and greater, the running demands of the fullbacks were greater than those of the middle forwards and outside backs (ES 1.1−1.4, P < .05).Conclusions:These findings suggest that the running demands of rugby league fluctuate vastly across a match. Fullbacks were the only position to exhibit a greater running intensity than any other position, and therefore training prescription should reflect this.

Analysis of Physical Collisions in Elite National Rugby League Match Play

2015 ◽  
Vol 10 (6) ◽  
pp. 732-739 ◽  
Author(s):  
Cloe Cummins ◽  
Rhonda Orr
Keyword(s):  
Global Positioning System ◽  
Rugby League ◽  
Positioning System ◽  
Match Play ◽  
Impact Forces ◽  
Global Positioning ◽  
The Individual ◽  
Attack And Defense ◽  
The Impact

Objective: To investigate the impact forces of collision events during both attack and defense in elite rugby league match play and to compare the collision profiles between playing positions. Participants: 26 elite rugby league players. Methods: Player collisions were recorded using an integrated accelerometer in global positioning system units (SPI-Pro X, GPSports). Impact forces of collisions in attack (hit-ups) and defense (tackles) were analyzed from 359 files from outside backs (n = 78), adjustables (n = 97), wide-running forwards (n = 136), and hit-up forwards (n = 48) over 1 National Rugby League season. Results: Hit-up forwards were involved in 0.8 collisions/min, significantly more than all other positional groups (wide-running forwards P = .050, adjustables P = .042, and outside backs P = .000). Outside backs experienced 25% fewer collisions per minute than hit-up forwards. Hit-up forwards experienced a collision within the 2 highest classifications of force (≥10 g) every 2.5 min of match play compared with 1 every 5 and 9 min for adjustables and outside backs, respectively. Hit-up forwards performed 0.5 tackles per minute of match play, 5 times that of outside backs (ES = 1.90; 95% CI [0.26,3.16]), and 0.2 hit-ups per minute of match play, twice as many as adjustables. Conclusions: During a rugby league match, players are exposed to a significant number of collision events. Positional differences exist, with hit-up and wide-running forwards experiencing greater collision events than adjustables and outside backs. Although these results may be unique to the individual team’s defensive- and attacking-play strategies, they are indicative of the significant collision profiles in professional rugby league.

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