Guidelines for using GPS devices in sport
Over the last number of years advancements in technology have affected almost every aspect of our lives, and sport is no exception.The desire to improve performances at elite level where even the smallest of margins can make the difference between success and failure, means that monitoring all aspects of an athlete’s regime through technology can have huge benefits. As a result teams and individual athletes rely heavily on the data that is obtained from global positioning systems (GPS) and micro electrical mechanical systems (MEMS). This information helps the decision-making process in terms of training and competition. Given the importance of such data for an athlete, it is no surprise that many studies have been conducted to establish the effectiveness of the information in terms of how it should be reported and interpreted in a sports context.
This is an issue that is addressed in Unpacking the Black Box: Applications and Considerations for Using GPS Devices in Sport by James Malone, Ric Lovell, Matthew Conroy Varley and Aaron James Coutts. This detailed report will be of interest to anyone relying on data as it aims to look at the factors that affect the information provided by athlete tracking devices and also suggests guidelines in terms of collecting, processing, and reporting of data.
The idea is that when a standard approach to data collection has been established, it makes it easier for all involved in sport to make informed decisions. The authors note that developments in microprocessors, data processing and software mean that technology is continually improving in terms of athlete tracking and state that
With these advancements, researchers have conducted independent validity and reliability studies as each device/update is released from commercial suppliers. However, due to the time taken to publish such studies, GPS devices are often used in sport before essential independent information on measurement precision is available
Challenges to collecting reliable data
While accepting that there are many challenges involved in establishing data for reporting, the authors believe that having guidelines would be of benefit to all involved in sport, particularly at the elite level. Given the difficulties there can be when it comes to testing, the report outlines the main obstacles to accurate reporting and suggests solutions, as follows:
- The signal quality received by GPS devices during data collection influences the accuracy of the data recorded. This could result in coaches making decision based on incorrect data and that could have implications for the training programme. As a result, the authors strongly recommend that practitioners ensure they have confidence in the data they use on a daily basis to make practice-changing decisions
- GPS devices can calculate distance and velocity via two different methods, from positional differentiation or Doppler-shift. Manufacturers should include this information in documentation pertaining to their devices as it is relevant for both practitioners and researchers. If velocity and distance are calculated from two different methods it is an important consideration as validation is required of both measures
- Users should be aware that data processing by commercial software can be subject to change due to changes in technology and processing algorithms. In circumstances where researchers are conducting studies using historical or longitudinal data, it is recommended to export and analyze the data using the same software version and disclose this information to research consumers
- Due to differences in the specific challenges of each sport and differences in athletes it is difficult to come up with a uniform threshold for each sport. As a result it suggests that users may also consider individualizing the thresholds for each athlete according to their fitness attributes
The report recommends that the correct procedures are followed when using devices such as the device being properly calibrated, worn on tight-fitting garments, and that when looking at results practitioners should take into account satellite connection quality and also the fact that measurement criteria may differ with different manufacturers. In terms of real-time testing, the report points out that data can be influenced by a number of factors including the distance of the antennae from the GPS device and the processing ability of the GPS device to stream data.
Recommendations for improving reporting standards
In conclusion, the report highlights the fact that there is currently no clear consensus on the appropriate reporting standards using GPS and MEMS devices. As a result they have put forward the following recommendations to prompt an improvement in reporting standards both in research and also applicable in applied practice:-
- Researchers should include information regarding the number of satellites, HDOP, device brand/model, sampling frequency and software/firmware versions in any published research, together with details of data inclusion/exclusion criteria
- Researchers and practitioners should be aware of the minimum time used to identify efforts and the smoothing filters used to derive acceleration data. Furthermore, this information should be included in any published research
- Manufacturers should provide information regarding any changes relating to data processing with updates to software or firmware
- Practitioners are urged to carefully consider the justification for the short- and long-term application of arbitrary and/or individualized speed thresholds to examine the locomotor (or intensity) distribution of external load
- Users are cautioned against using one physiological and/or performance metric to anchor multiple individualized speed zones, and to reflect upon practical considerations such as routine fitness testing, test battery selection, and time-efficient processing of individualized GPS data
- Comparing accelerometer data between different athletes to make judgments regarding external load should be undertaken with caution due to the large degree of variation
- Inertial sensors and the use of sport-specific algorithms provide an insight into the future of load monitoring, although this is a relatively new area which requires further work to ensure reliable and valid data is produced, and to refine existing metrics
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About Metrifit
Metrifit is an athlete monitoring system that gathers subjective and objective information from both coaches and athletes to drive behavior modification and improvement through insights modeled on descriptive and predictive analytics. It sounds complicated but Metrifit prides itself on its simple intuitive interface and advocates a simple effective approach that doesn’t overwhelm the athlete or the coaching/staff member. It has received high praise for its intuitive interface and it allows monitoring to be scaled for all levels of athletes and teams. Recent research by Anna Saw (Deakin University, Australia) has shown that use of Metrifit is associated with increased athlete sporting self-confidence. Metrifit is ‘athlete-centric’ helping to develop self-awareness, encourage creative thinking and emotional intelligence as well as developing ownership and responsibility within the athlete for their own success.
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Metrifit Athlete Monitoring System
2017-06-20T22:26:45+01:00
Derek Bol
Strength & Conditioning Coach, Valparaiso University
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"The ability to acutely monitor stress and recovery and make the correct adjustments was critical to our health and performance throughout the NCAA tournament. Metrifit has a very strong educational component. With the information we get, I am able to clearly understand the habits and behaviors of our athletes, and how they may be impacting performance."
Metrifit Athlete Monitoring System
2017-06-12T11:42:14+01:00
Erik Helland
Director of Strength & Conditioning and Head Strength Coach Men’s basketball, University of Wisconsin
https://metrifit.com/blog/testimonials/erik-helland/
"When our players have been only training with the national team Metrifit allows me to liaise very closely with our conditioning coaches to manage load and intensity of training during training camps. I recommend it to anyone who wants an easy to use monitoring system."
Metrifit Athlete Monitoring System
2017-06-15T12:51:46+01:00
Dave Passmore
Head Coach, Irish Hockey
https://metrifit.com/blog/testimonials/dave-passmore-short/
"Metrifit is an outstanding platform to track your athletes’ wellness. It’s simple to use, easy to implement and gives outstanding information on your athlete’s subjective wellness which can be used to assign training loads. I highly recommend Metrifit for any coach looking to begin implementing technology into their program"
Metrifit Athlete Monitoring System
2017-06-12T17:58:50+01:00
Brijesh Patel
Quinnipiac University, Head Strength and Conditioning Coach
https://metrifit.com/blog/testimonials/brijesh-patel/
"I wanted to reach out to thank Metrifit for an extremely successful season. Our Regis University women’s side won the ultra-competitive RMAC with a 11-0-1 record. Our student-athletes reported in post-season interviews the positive use of Metrifit that enabled their own reflection about their bodies and also found value providing information to coaches for our strategic planning purposes. On more than one occasion, we recognized deviations from norms and were able to step-in with a quick chat to help a player get back on track or refer her to the proper support personnel for further assistance. Fantastic! "
Metrifit Athlete Monitoring System
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J.B. Belzer
Head Coach, Women's Soccer at Regis University
https://metrifit.com/blog/testimonials/jb-belzer/
"The success of young athletes using Metrifit was an interesting challenge in the Elite Soccer space… After six months of learning, creating habit with teenagers the project is a huge success…. 90% completion rate has allowed us deal with all the key KPI’s that are needed in their development. In our space with developing athletes…Metrifit is a godsend and is the most important tool in this space."
Metrifit Athlete Monitoring System
2017-06-16T16:51:01+01:00
Niall O’Driscoll
Academy Directory, SJ.B (St. Joseph’s Bray ) Academy
https://metrifit.com/blog/testimonials/niall-odriscoll-short/
"The holistic approach of medical, physical, emotional and even tech/tactical; bringing together what we need to monitor and evaluate our University players. “If you can’t measure it – it doesn’t exist.” I know we were the first Canadian University to use the program and I know many more will be asking for it in the future! I highly recommend Metrifit."
Metrifit Athlete Monitoring System
2017-06-12T14:25:37+01:00
Tino Fusco, B.Sc. ChPC
Head Coach, Women's Soccer, Mount Royal University (Canada)
https://metrifit.com/blog/testimonials/tino-fusco-b-sc-chpc/
"Metrifit provides immediate insight and feedback on the physical and mental states of the student-athletes. It allows us to adjust practices and training sessions to accurately meet needs. We have been able to identify potential injury concerns, track current injury status and monitor return to play progress."
Metrifit Athlete Monitoring System
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Kari Thompson
Head Volley Ball Coach, Southern Illinois University
https://metrifit.com/blog/testimonials/kari-thompson/
"The Metrifit RTP platform is an excellent tool to monitor, evaluate and make the right decisions for your athlete’s well being and performance. It enables coaches and athletes to track and sift through all the variables that underpin well being and performance on a day to day basis and to address an issue or potential issue in real time. A simply wonderful product."
Metrifit Athlete Monitoring System
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Dr. Dale Richardson
CEO Achieve Total Performance Pty Ltd
https://metrifit.com/blog/testimonials/dale-richardson/
"We have been using Metrifit for the past season at Cornish Pirates. It has been greatly beneficial for us to have our wellness and load management data on one easy to access system. We have found this invaluable over the past season whereby Coaches, Physios and Strength and conditioning coaches can monitor both the psychological and physiological load of our athletes on a daily basis."
Metrifit Athlete Monitoring System
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Paul Cremin
Head Physiotherapist, Cornish Pirates Rugby Club
https://metrifit.com/blog/testimonials/paul-cremin-short/
"Metrifit has been hugely beneficial in supporting our coaches and back room staff to track and monitor our players training loads, performance and readiness to train. Having a one-stop shop for collating all relevant information across a holistic picture of the player allows us to help prevent burnout, injury and provide timely feedback and communication to all."
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Eamonn Fitzmaurice
Kerry Senior Football, Manager
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Metrifit Athlete Monitoring System
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Michael Torres
CEO, Shift Performance, Miami
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"Metrifit has enabled us to bring to life the complexiities associated with managing the academic, pastoral and sporting demands of pupils aged 13 - 18 in a UK day and boarding school environment It has provided another bridge between coaches and sports pupis, giving pupils a space to provide honest self reflection on wellbeing and providing coaches a head start on appropriate freshness and fatigue balance across the school week."
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Graham Williams
Athletic Development Coach, MSc ASCC
Millfield School, UK
https://metrifit.com/blog/testimonials/graham-williams-short/
"Metrifit is an integral part of the set up within the senior and intermediate inter-county Camogie. The data collected daily on the individual players is critical to the decision making of the backroom team including, managers, trainers, selectors, physiotherapist and indeed myself. As a nutritionist it allows me to monitor the quality of the player’s diet, energy levels, sleep pattern and overall wellbeing."
Metrifit Athlete Monitoring System
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Yvonne Treacy
Nutritionist, Wexford Camogie
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Metrifit Athlete Monitoring System
2017-06-16T15:11:55+01:00
Dan Horan
Head of Fitness for International Football/Fitness Coach Men's Senior Team
Football Association of Ireland
https://metrifit.com/blog/testimonials/dan-horan-short/
"Metrifit has been used to gain a more in-depth insight into our student-athlete’s progressive athletic development and balance relative to their particular sporting and training activities, academic studies and total load. Metrifit doesn’t just help with optimising our Sports Scholarship students’ athletic performance. It assists us in helping them get the balance right between their sporting activities and academic studies."
Metrifit Athlete Monitoring System
2017-06-12T13:58:58+01:00
Richard Deuchrass
Lincoln University Athletic Performance Manager
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“Metrifit has become a multifactorial platform that has helped up us provide deeper context to the decisions that we make on a daily basis in regards to the physical development of our student-athletes. We have intimately been utilizing both the subjective wellness questionnaire along with player training load data to drive professional conversation and actionable tasks to enhance the sporting results and quality of life for our student-athletes with unparalleled success.”
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2017-06-20T12:12:33+01:00
Kevin Schultz
Associate Director of Strength & Conditioning
Director of Olympic Strength & Conditioning
University of Wisconsin
https://metrifit.com/blog/testimonials/kevin-schultz-full/
"We have found metrifit to be a great tool to ensure we can monitor and adapt our athletes training loads regularly. This programme has ensured our coaches and staff can maximize all training and recovery to each individual needs on a day to day basis. It is user friendly and provides excellent visual data that can be viewed by both practitioners and athletes. With the help of Metrifit support team, we have personalized it to suit our specific sport and training needs. It's a excellent athlete monitoring tool and is essential for assisting the team to perform at their best"
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Lee Stutely
Team Manager and Athlete Support Services Coordinator at Great Britain Wheelchair Rugby
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"Our coaches through Metrifit basically have an ‘X-ray’ vision into the habits and lifestyles and stressors their athletes have on a day to day basis, especially when they are not together. Thus the professional authentic relationships created through the casual conversations, reflection process and application provided is priceless."
Metrifit Athlete Monitoring System
2017-06-12T14:21:17+01:00
Brian Clarke
Head Strength and Conditioning Co-ordinator,Noblesville High School
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"While working with the Clare Senior Hurling team (2012-2014), Horse Sport Ireland (U25 European Eventing Champions) and currently with the Limerick Senior Hurling Team, Metrifit provides our team with critical information across a number of essential aspects of elite athletic performance. You don’t really know how your players are responding to training stimuli unless you have daily data and Metrifit provides and easy to use and highly effective means of finding this critical information."
Metrifit Athlete Monitoring System
2017-06-12T13:55:49+01:00
Joe O’Connor
NISUS Fitness, S&C Coach Clare Senior Hurling, Horse Sport Ireland and Limerick Senior Hurling
https://metrifit.com/blog/testimonials/joe-oconnor/
"Gaelic football is an intermittent high-intensity collision-based field sport requiring high levels of endurance, strength, power, agility, and speed as well as proficiency with gaelic-related skills. These components comprise the training modalities used at the elite level and the monitoring of such a vast range of modalities is central to peak performance. The athlete monitoring tool Metrifit allows us to do this and can keep us one step ahead of our competitors."
Metrifit Athlete Monitoring System
2017-06-12T14:23:50+01:00
Jason McGahan
Sports Scientist, Kildare Football, PhD Sports Science Researcher
https://metrifit.com/blog/testimonials/jason-mcgahan/
“Metrifit has allowed us to gain better insight on our athletes and their individual stress response to training and outside factors. This has helped us to make daily adjustments when necessary, to further enhance their development which has led to higher performance levels, faster recovery, and a reduction in injuries. The new lifestyle profiling survey has been an invaluable insight into the lifestyle habits of my athletes and has helped focus on key areas that can be improved, benefiting athletes on their performance journey.“
Metrifit Athlete Monitoring System
2021-04-27T11:02:12+01:00
Dan Rickaby
Assistant S&C Coach, Tulane University
https://metrifit.com/blog/testimonials/dan-rickaby/
"Metrifit has been a great asset in helping guide the numerous decisions we make on a daily basis, that have a direct impact on our athletes well-being and progress. The platform is extremely user friendly and the reports and analytics that reflect the data collected daily, can be catered to what you are most specifically curious to know about the athletes both individually and collectively"
Metrifit Athlete Monitoring System
2021-04-29T15:31:16+01:00
Aaron Mansfield
Head Coach, LMU Lions, Loyola Marymount University
https://metrifit.com/blog/testimonials/aaron-mansfield/
"When COVID altered college athletics as we knew it, Metrifit came to the rescue. This intuitive athlete monitoring, health and well-being system provides the athlete, coach, and sports medicine staff a way to monitor and balance the physical, emotional, health and well-being of our athlete’s. Metrifit provided that calm in the middle of the perfect storm for our entire athletic department for the future. Thank you to the entire Metrifit family for assisting our department with a seamless process."
Metrifit Athlete Monitoring System
2021-04-07T16:43:52+01:00
Jennifer McIntosh
Head Athletic Trainer, Colorado School of Mines
https://metrifit.com/blog/testimonials/jennifer-mcintosh/
"We started using Metrifit to see if it gave us better predictability and allowed easier monitoring than our DIY excel sheets prior to the Tokyo qualifiers. In a sport where measuring training load is very difficult, Metrifit filled a huge gap in our ability to monitor our athletes’ performance state and recovery. After some months of collecting data I was able to clearly see when to back off and when to keep going with different aspects of the training programme, as well as when to provide extra care and support for our elite athlete – and without a doubt it is much more informative and sensitive than our DIY model, not to mention much easier! Looking forward to the next Olympic cycle with Metrifit as one of our essential tools."
Metrifit Athlete Monitoring System
2021-05-28T12:30:33+01:00
Emma Hawke, PhD Exercise Physiology
Coach - Sweden Climbing, Olympic Offensive - Female Coach Swedish Olympic Committee, Senior Lecturer - Coach education programme (Sweden)
https://metrifit.com/blog/testimonials/emma-hawke/
"The visualisation of data allows for easy discussion between athletes, performance staff and medical teams and offers the potential to predict and avoid issues which could hamper performance. Over the year the data has proven instrumental in our critical decision making. Metrifit is a excellent monitoring tool however the unsung additional aspect is the fantastic and tireless customer support."
Metrifit Athlete Monitoring System
2017-07-25T14:10:08+01:00
Robert Walsh
Strength Coach
Nederlandse Ski Vereniging (Netherlands Ski/Snowboard Team)
https://metrifit.com/blog/testimonials/robert-walsh-short-testimonial/
"I've found Metrifit an invaluable resource. Not only to monitor daily wellness, readiness to train and training load within the squad, but also to monitor training load externally with additional external squads. Furthermore, Metrifit has acted as a key teaching tool, allowing young athletes associate good sleeping, eating and recovery habits to an improved sense of wellness and thus superior on-field performance."
Metrifit Athlete Monitoring System
2017-06-14T13:31:14+01:00
Tommy Mooney
Strength and Conditioning Coach at DCU Sport and with Dublin Minor GAA
https://metrifit.com/blog/testimonials/tommy-mooney-short/
"Metrifit has provided me with an opportunity to get to know and understand our players on a different level. I've found our conversations to be more intentional, which has been so important in developing deeper, more authentic relationships. Ultimately, understanding their needs has allowed me to push buttons that leads them to be better people and inspires them to be better athletes"
Metrifit Athlete Monitoring System
2021-04-27T11:10:43+01:00
Ryan Osborn
Head Basketball Coach, Carmel High School
https://metrifit.com/blog/testimonials/ryan-osborn/
“I have been using Metrifit for the past number of years and I have found it to be an excellent piece of software. It is extremely easy to use and has proved very beneficial in preparing myself for competition. The ability to view my health and wellbeing stats everyday and see how this influences my performance in both practice and competition has been very helpful. I have been able to put more effort into key areas such as fluid intake, sleep and balanced golf practice and training. Having the ability to view my detailed stats helps me to understand exactly where I am and how I need to adjust my training or health choices. I have found using Metrifit this past year has been a crucial help for me to play well. As I now have turned 50 I am playing on The Champions tour in the USA and have played well during my first year. Metrifit has been as important as my golf equipment in achieving that success.”
Metrifit Athlete Monitoring System
2019-03-04T20:48:39+00:00
Robert Karlsson, Professional Golfer
https://metrifit.com/blog/testimonials/robert-karlsson/
"Metrifit is an amazingly easy-to-use yet comprehensive monitoring tool for training and recovery! The elite athletes we work with are able track and monitor their situations and states daily, in order to maximize their performance loads and recovery practices. This also helps our coaches customize the training programs more effectively. I'd recommend this for any serious team / athlete or coach in wanting to bring out the very best in their long-term performances! "
Metrifit Athlete Monitoring System
2017-06-12T18:03:35+01:00
Edgar K. Tham
Founder and Chief Sport & Performance Psychologist, SportPsych Consulting (Singapore, Indonesia, Philippines)
https://metrifit.com/blog/testimonials/edgar-k-tham-2/
"The cutting edge technology of Metrifit enables Managers, Coaches and Players to use this innovative technology to gain these crucial percentage points over their opponents in a technologically advanced yet easy to use web-based platform. The data collated on a daily basis greatly informs Management Teams while the educational aspect of the system really appeals to modern day athletes who are constantly looking for that extra edge."
Metrifit Athlete Monitoring System
2017-06-14T13:24:03+01:00
Cian O’Neill
Kildare Senior Football Manager
https://metrifit.com/blog/testimonials/cian-oneill-short/
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