Monday 29th August 2016
PART III
Pre-season GPS Update with Chris Hagan
http://www.ulsterrugby.com/news/15133.php#.V8RScmD2bIUWith pre-season training coming to an end, Chris Hagan talks us through the use of GPS analysis in monitoring the progression of players throughout the summer...
The process and importance of GPS tracking over pre-season…
All players wear GPS units and heart rate monitors at every pitch session whether it be team, conditioning, speed or rehab sessions. This information allows us to cover all areas required to maximise a player's training efforts and match availability.
Information from the units is sent to my laptop pitch-side which allows for feedback to the coaches and players throughout the session. This is beneficial for two reasons - it allows for in-session adaptation to occur if required and also builds competition for players both intrinsically and externally against other members of the squad.
Once each session is complete, the GPS units are collected in and the data is then downloaded on to STATSports Viper Software to allow for post-session analysis. The analysis carried out here is in much greater detail than what is done pitch-side. The metrics which are viewed are dependent on the session which just occurred for example a Speed session = maximum speeds and high speed running metres; and a Contact session = number of collisions and collision load. This information is recorded in personal databases that we have designed here at Ulster Rugby.
GPS tracking has become extremely important - it has taken the guess work out of player monitoring. The STATSports GPS unit and Polar heart rate monitor allows us to quantify the external and internal demands placed on a player during pitch sessions. An example of the data we collect: Total distance covered (m)
Metres per minute
Maximum Speed
High Speed Running Metres (distance player covers at 75%+ of max speed)
High Metabolic Load Distance (high acceleration & deceleration demands)
Dynamic Stress Load- Fatigue marker
Collisions- Both Number of collisions & total collision load
Heart Rate- Max, % Time in Red Zone (>85% of max speed)
Heart Rate Exertion
GPS tracking during pre-season is important for two main reasons:
It allows for the physiological monitoring of a player's workload on a daily/weekly/monthly basis. The results recorded by the Strength & Conditioning Department are constantly communicated to the Medical Department, which allows for maximum availability of players for pitch sessions. This is beneficial both for the player in terms of allowing maximum adaption/learning to occur during this pre-season period and the coaches get to spend as much time as possible with the players developing their skill sets in on-pitch areas.
Secondly, it allows for comparison between players exposure to training demands and match demands. We train the player to the game he will be exposed to in terms of the neural, metabolic and structural muscle damage he will experience when involved in matches. When Jonny Davis (Head Strength & Conditioning Coach) is designing a training session with the coaches, the information we gain from the GPS unit during matches allows us to quantify the demands of the worst case scenario moments the players will face. Therefore, allowing the coaches to implement drills or situations to replicate these scenarios and prepare the players as best as possible when faced with this in a match. For this we carry out monitoring procedures in a number of ways for example looking at the players absolute and relative loads i.e. percentage of match demands and their Acute to Chronic Workload Ratio (Training Stress Balance).
The key performance stats the coaches are most interested in during pre-season…
When carrying out conditioning games, the players receive feedback after each block who the top 3 and the bottom 3 are in terms of their metres per minute. So all coaches are keen to hear the players mentioned here and see which players are moving at the pace required to cope with attack/defence phase play during matches.
Joe Barakat is interested in our collision data during pre-season through the BJJ sessions developing into rugby contact sessions. He wants to know the number of collisions players are having as well as the average load per collision and how this is building towards the first competitive fixture but in a controllable manner. Neil Doak will look at the intensity we are training at in attack, specifically in the green zone, as he wants training to replicate the high tempo attack style of a game.
Stand out stats during pre-season…
Ruan Pienaar completed his first pre-season with us in six years, he was one of the players with a new max speed as well as topping the charts on a number of occasions during small sided games, along with his scrumhalf partner David Shanahan.
Matty Rea also took part in his first senior pre-season and coped really well with the demands placed on him both in running and contact conditioning sessions. He has followed through with this impressive pre-season with good technical performance stats in the two warm up games.
Paddy Jackson has shown some amazing stats. Paddy has the highest overall distance in matches (which isn't really a surprise as he is out-half) but he connects this with great movement intensity in terms of High Speed Running Metres and Metabolic Distance (his ability to accelerate over and over again is astonishing). From his first SSG session himself and Ruan have been battling it out for top spot!
Competition for top spot…
The environment we strive for is one where the individual looks to improve themselves to ultimately benefit the team. Craig Gilroy is competitive in terms of being the fastest player in the squad, last season Sam Arnold recorded a new max speed which equalled Craig's. He was then determined to go out and carry out a speed session to beat the speed set by Sam. This benefits the team in terms of getting the ball to him in space on the pitch and allowing him to use his speed to create line-breaks or finish tries.
So with the competitive nature of these professional athletes, the GPS units provide solid information to allow both coaches and players to track improvements on certain aspects of their physical performance. Whether it be their max velocity, reducing time in the red zone during conditioning (if reduced this highlights the player is adapting to the demands placed upon them) and achieving higher figures in their collision loads. With good transparency of data throughout the team, this brings about players naturally comparing themselves against the guys they are competing with for position in the team. Addressed in the right way, this benefits the performance level that our players achieve while at Ulster Rugby.
Pre-season records provide a good foundation for statistical tracking…
Monitoring players workloads is crucial throughout the entire season as statistically the higher the availability of players for selection the higher the win percentage of a team is, especially at the business end of the season. So constant monitoring through GPS must occur to help us to reduce the number of preventable injuries in our squad to give the team the best chance of winning.
As we move into the season the GPS data is not only used as a physiological pillar of performance but also aids in the technical and tactical pillars of performance. During this game we will look at player's involvement per minute versus their metres per min, matching the GPS and video data to give further evidence of analysis of our kick chases, look at maximum speeds players reach, carrying and tackling quality, collision load associated to dominant, neutral and passive collisions.