Search Results

You are looking at 1 - 10 of 435 items for :

  • Refine by Access: All Content x
Clear All
Restricted access

Denise Jennings, Stuart Cormack, Aaron J. Coutts, Luke J. Boyd, and Robert J. Aughey

Purpose:

To examine the difference in distance measured by two global positioning system (GPS) units of the same model worn by the same player while performing movements common to team sports.

Methods:

Twenty elite Australian football players completed two trials of the straight line movement (10, 20, 40 m) at four speeds (walk, jog, stride, sprint), two trials of the changes of direction (COD) courses of two different frequencies (gradual and tight), and five trials of a team sport running simulation circuit. To assess inter-unit variability for total and high intensity running (HIR) distance measured in matches, data from eight field players were collected in three Australian Hockey League (AHL) matches during the 2009 season. Each subject wore two GPS devices (MinimaxX v2.5, Catapult, Australia) that collected position data at 5 Hz for each movement and match trial. The percentage difference ±90% confidence interval (CI) was used to determine differences between units.

Results:

Differences (±90% CI) between the units ranged from 9.9 ± 4.7% to 11.9 ± 19.5% for straight line running movements and from 9.5 ± 7.2% to 10.7 ± 7.9% in the COD courses. Similar results were exhibited in the team sport circuit (11.1 ± 4.2%). Total distance (10.3 ± 6.2%) and HIR distance (10.3 ± 15.6) measured during the match play displayed similar variability.

Conclusion:

It is recommended that players wear the same GPS unit for each exercise session to reduce measurement error. The level of between-unit measurement error should be considered when comparing results from players wearing different GPS units.

Restricted access

Anna M.J. Iveson, Malcolm H. Granat, Brian M. Ellis, and Philippa M. Dall

context to physical activity data is the use of global positioning system (GPS) devices ( Kerr, Duncan, & Schipperijn, 2011 ), which use satellite tracking to assess the location of individuals at regularly sampled intervals. These data therefore have the potential to provide information about the

Restricted access

Chelsea Steel, Carolina Bejarano, and Jordan A. Carlson

Concurrent use of multiple person-worn sensors, such as combining data from Global Positioning Systems (GPS) trackers and accelerometers, is becoming more common in field-based physical activity research. The use of GPS trackers combined with accelerometers has been particularly useful in the

Restricted access

Mathieu Lacome, Ben Simpson, Nick Broad, and Martin Buchheit

-based external load measures (ie, locomotor activity during small-sided games [SSG]) tracked with global positioning system (GPS) and an objective measure of internal load (ie, HR response to the same drills) in 10 elite soccer players. The second aim was to examine the ability of each individual model to

Restricted access

Kosuke Tamura, Jeffrey S. Wilson, Robin C. Puett, David B. Klenosky, William A. Harper, and Philip J. Troped

accelerometers and global positioning system (GPS) units can be used to quantify PA occurring on trails and thereby provide a better understanding of how community trails can support regular PA. 23 , 24 To date, researchers have concurrently used these devices to objectively assess how much PA occurs at home

Restricted access

Matt Greig, Hannah Emmerson, and John McCreadie

Global Positioning System (GPS) technology offer potential to quantify mechanical loading during functional rehabilitative tasks. Recently, mediolateral loading imbalances were highlighted in a case study of ankle sprain injury in elite male soccer. 11 However, to enhance the clinical application of GPS

Restricted access

Andrew D. Govus, Aaron Coutts, Rob Duffield, Andrew Murray, and Hugh Fullagar

rate and blood lactate) and external-load measures derived from microtechnologies such as global positioning systems (GPS) and accelerometers. 3 – 5 Consequently, s-RPE training load is used extensively alongside GPS-derived metrics of training load (such as player load and total distance run) in

Restricted access

Heidi R. Thornton, André R. Nelson, Jace A. Delaney, Fabio R. Serpiello, and Grant M. Duthie

Global positioning systems (GPS) are commonly used in team sports to quantify the movement patterns of athletes during training and competition. 1 GPS devices can provide a large number of movement variables including distance, speed, acceleration/deceleration, and metabolic power. 1 , 2 By

Restricted access

Gustavo Tomazoli, Joao B. Marques, Abdulaziz Farooq, and Joao R. Silva

of training experience. Data were collected during the competitive phase (10 official matches played between February and March) of the 2016–17 season. The inclusion criteria were as follows: (1) a minimum of 2 matches per player where PRS and GPS match data were both recorded and (2) ≥75 minutes of

Restricted access

Brian M. Wood, Herman Pontzer, Jacob A. Harris, Audax Z.P. Mabulla, Marc T. Hamilton, Theodore W. Zderic, Bret A. Beheim, and David A. Raichlen

pedestrian travel can be gathered with relative ease using either accelerometers or Global Positioning System (GPS) devices ( Chen, Janz, Zhu, & Brychta, 2012 ; Terrier & Schutz, 2005 ). Ideally, data from these sources could be integrated to enable greater comparative research and build on the specific