26 February, 2019

WHICH VARIABLES DO WE TRAINERS LOOK AT TO HELP US MAKE DECISIONS?

Sports Performance
Team Sports
Blog
Team sports performance
160K

Of all the variables provided by the systems that monitor and record our players’ activity, what is the most relevant information? This is a question that all coaches will probably face when they begin managing the large volumes of data generated in every training session. However, in most cases, the choice of variables does not actually follow a systematic process, but rather depends on the users’ personal preferences, which are sometimes haunted by trends in the use of variables that have not yet been sufficiently contrasted.

The high quantity of variables supplied by the technological tools available today has made it necessary to study and reduce the number of variables to be managed in the training process. This is why we must choose the most valid options available in order to understand the demands of the sports activity in question. We have to be practical and make this arduous recording process sustainable; in other words, we should take into account the available temporal, material, human and technological resources in such a way that the cost-benefit relationship is as efficient as possible.

Among other options, the implementation of principal components analysis makes it possible to identify the variables that supply the most information, differentiating between those that supply complementary information and those that supply redundant information. This drastically reduces the number of variables or dimensions to study. In the work being presented, the authors recorded different intensity measurements during training tasks and official soccer matches.

Sign up for the certificate in Workload Management in Football

The main findings of this study indicate that three main components are needed to summarize the different intensity measurements, and these offer different weightings or degrees of importance depending on the game format being studied. Regardless of the game format being studied, the 1st component accounts for 40% to 45% of the variance, with average metabolic power being the variable with the greatest weight. The 2nd component accounts for between 20% and 25% of the variance, and this is represented by speed variables (e.g., distance covered at high speed, distance covered at sprint, and peak speed). Lastly, the 3rd component accounts for between 10% and 15% of the variance, in which the inertial variables (dynamic stress load, or DSL, and impact) are grouped.

Thus a practical application of this study indicates that in order to collect the majority of the external load information, regardless of the game format being studied, we need to consider locomotor or strength variables, speed variables, and inertial variables. In short, we would need to consider the following indicators:

  1. Locomotor or strength variables: average metabolic power (AMP) or total distance covered or high metabolic load distance or distance covered in acceleration and high-intensity decelerations
  2. Speed variables: Peak speed reached or distance covered at high speed
  3. Inertial variables: Impact or IMP or dynamic stress load (DSL)

Nevertheless, when game formats change, the importance of the variables within the main component also changes. In small positional play of 4 vs. 4 + 3 in a space of 13 x 17 m, the speed variable that provides the most information is peak speed, followed by distance covered at high speed. For example, in 10 vs 10 situations played in 105 x 65 m, the variable that provides the most information within the second main component is distance covered at sprint, followed by distance covered at high speed, and peak speed. Thus the weight of each variable changes depending on the game format being studied.

In the process of choosing variables for the subsequent management of training and competition loads, we must try not to duplicate information; only the indicators needed to obtain valid and applicable information should be chosen (Castellano and Casamichana, 2016).

 

David Casamichana – Strength and Conditioning Coach at Real Sociedad

@DavidCasamichan

Antonio Gomez – Strength and Conditioning Coach at FC Barcelona

@antoniogomezo8

Julen Castellano – Head of the Doctoral Program in Physical Activity and Sports at the University of the Basque Country (UPV/EHU)

@julencastellano

Andrés Martin – Strength and Conditioning Coach at FC Barcelona

@andresinef

 

References.

Gestión de carga de trabajo. Barca Innovation Hub. https://barcainnovationhub.com/es/product/certificado-en-gestion-de-la-carga-de-trabajo-en-futbol/

Castellano, J. and Casamichana, D. (2016). El arte de planificar en fútbol. Futboldelibro.

RELATED NOTES

FOOTBALL IS FOR FOOTBALLERS

FC Barcelona recently held a conference entitled “Barça: Female and Diverse” to coincide with the International Women’s Day, organized at the Camp Nou facilities.

MAXIMUM DEMAND SCENARIOS IN POSITIONAL PLAY: ARE THEY EQUALLY REPLICATED ACROSS ALL POSITIONS?

Players’ conditional response during competition, for example, distance covered at a run, has traditionally been described using the average value covered during a half or full game.

THE INFLUENCE OF THE PERCEIVED EXERTION RATING ON FOOTBALL TRAINING AND COMPETITION.

Monitoring training load is one of the fundamental tools for optimising the performance of both elite athletes in general and football players in particular.

HOW DO THE NUMEROUS CONSTRAINTS AFFECTING ATHLETIC PERFORMANCE RELATE TO ONE ANOTHER?

We know that athletic performance is a complex phenomenon that depends on numerous constraints, but do we know how these constraints relate to and interact with each other?

A SIMPLE AND INNOVATIVE INDICATOR FOR WHEELCHAIR BASKETBALL AND WHEELCHAIR RUGBY TRAINING

Despite the growing interest in Paralympic sports, research into performance in elite wheelchair sports has seen very little development.

ENTROPY, A NEW MEASUREMENT IN STRENGTH TRAINING

The ability to sprint is essential in the majority of team sports, including rugby, soccer, and basketball. But this ability is not developed in stable and controlled conditions: players are constantly subjected to variable demands, whether receiving, carrying, passing, hitting, or throwing the ball.

ARE SMALL-SIDED GAMES THE SOLUTION TO ALL OUR PROBLEMS?

One of today’s most attention-grabbing topics among sports researchers, coaches and managers have to do with the study of maximal demand scenarios, also known as “worst case scenarios”.

POSITION SPECIFIC AND POSITIONAL PLAY TRAINING IN ELITE FOOTBALL: CONTEXT MATTERS

Those who have watched elite football across the last decade, realise that the game is more demanding than ever. This places more emphasis on training methods to prepare players for the rigors of the game.

PLAYER ORIENTATION, A KEY ASPECT OF PREDICTIVE MODELS IN FOOTBALL

In the OptaPro Forum this week, Carlos Rodríguez will be presenting a study currently being carried out by the club on the body orientation of players in different game situations. We sat down for a chat with him so that he could give us a brief explanation of the project.

FC BARCELONA: HOW OUR NEW RESEARCH HELPED UNLOCK THE ‘BARÇA WAY’

For the first time, our new research may provide some insight into the training methodology and, potentially, the secrets of the club’s success. These “secrets” could be closely associated with the theories put forward by coach Paco Seirul·lo and how they link with cutting edge sports science.

Sports Performance
Blog

DO FOOTBALL PLAYER’S MENTAL ABILITIES INFLUENCE THE RISK OF INJURY?

Mental abilities, although not yet fully appreciated, are already considered a relevant part of performance. But their importance could go beyond that: Do they also influence the injury risk, including recurrence, once the player returns to play?

NEW DATA ON PHYSICAL DEMANDS IN BASKETBALL PLAYERS

A basketball player performs approximately one thousand actions on average during a game, and at least one out of every ten requires high intensity. The detailed analysis of these physical demands allows for optimized training, improved performance and decreased injury risk.

Sports Performance
Blog

INJURY TYPE IN HANDBALL MAY VARY BY POSITION, CATEGORY AND MATURATION OF PLAYERS

Although several studies have tried to evaluate the characteristics of the risk of injury in handball players, they have been unable to reach sufficiently reliable conclusions. A new study of all the FC Barcelona handball categories has attempted to shed more light on the subject.

IS IT POSSIBLE TO DEVELOP AN “UNBREAKABLE” ATHLETE?

If the knowledge around the benefits of training load is increasing, is it possible for performance and medical staff to one day develop an “unbreakable” athlete? In a recent British Journal of Sports Medicine paper, researchers and practitioners joined forces to address this question.

Analysis and Sports Technology
Sports Performance
Team Sports
Blog

HOW PHYSICAL DEMANDS ON FOOTBALL PLAYERS VARY BY THEIR POSITION

Although there are several studies on this topic, many of them have analyzed these demands by looking at just a few variables or using very broad timeframes. A new study completed by physical trainers from F.C. Barcelona has analyzed several of these details more closely.

Health and Wellness
Sports Performance
Blog

THE GREAT UNKNOWN OF MUSCLE INJURIES: CONNECTIVE TISSUE IN THE EXTRACELLULAR MATRIX

An article published in The Orthopaedic Journal of Sports Medicine —in which members of the club’s medical services participated— now suggests to consider the detailed structure of the area affected, and treating the extracellular matrix as an essential player in the prognosis of the injury.

HAMSTRING AND OTHER MUSCLE INJURIES IN CHILDREN AND YOUNG ATHLETES

This is a groundbreaking study that addresses hamstring injuries in children and youth. The results indicate that the risk is lower than it is in adults, though no less significant, and that it increases progressively with age.

Sports Performance
Blog

WHAT IS LOAD MANAGEMENT REALLY ABOUT?

In this article, Tim Gabbett and his team provide a user-friendly guide for practitioners when describing the general purpose of load management to coaches.

Sports Performance
Blog

TWO WEEKS ARE ENOUGH TO INCREASE MUSCLE VOLUME AND STRENGTH

For the first time, it has been demonstrated that it does not take months of training to significantly improve both muscle volume and strength; instead, two weeks of an appropriate exercise are enough.

RECOVERY NUTRITION FOR FOOTBALL: BUILDING A TEAM

Analysis and Sports Technology
Team Sports
Blog

Degrees of freedom or degrees of slavery?

The understanding of the modifying variables of the game, based on the degrees of freedom.

Soccer from First Principles

The goal of this post is to outline a series of principles that are considered to be crucial to understand the development of FC Barcelona’s playing style.

Sports Performance
Team Sports
Blog

ECCENTRIC EXERCISES: STUDYING “VACCINES” FOR MUSCLES

Training using eccentric exercises is important to prevent possible damage. However, intensive training can also cause muscle damage, so it is critical to be vigilant in order to keep injury risk to an absolute minimum.

AN OBJECTIVE CLASSIFICATION OF MUSCLE INJURIES

An objective and appropriate classification would improve the accuracy of prognosis, allow treatment to be adjusted and reduce the risk of re-injury.

STUDY OF HIGH INTENSITY ACCELERATIONS AND DECELERATIONS IN SOCCER

A new dimension of analysis suggests that maximum accelerations occur with a frequency 8x greater than sprint actions.

Sports Performance
Team Sports
Blog

THE LEVEL OF RESISTANCE AS A MODERATOR OF THE TRAINING LOAD

Cardiovascular endurance manifests as a moderator of the load result to which the athlete is exposed.

PRE-SEASON TRAINING LOAD AND INJURY RISK

The pre-season or preparatory phase of the season is a time when major “errors” in training load management are often committed.

Sports Performance
Blog

Are the players well positioned in relation to the ball?

Through the use of computer vision we can identify some shortcomings in the body orientation of players in different game situations.

Spaces in Soccer from a Quantitative Perspective

In the words of Johan Cruyff, “Players, in reality, have the ball for 3 minutes, on average. So, the most important thing is: what do you do during those 87 minutes when you do not have the ball? That is what determines whether you’re a good player or not.” 

Diagnostic Imaging in Sports Medicine: Present and Future

Muscle injuries account for more than 30% of all injuries in sports like soccer. Their significance is therefore enormous in terms of training sessions and lost game time.

YOU WANT TO KNOW MORE?

  • SUBSCRIBE
  • CONTACT
  • APPLY

KEEP THE DAY WITH OUR NEWS

Do you have any questions about Barça Universitas?

  • Startup
  • Research Center
  • Enterprise

PLEASE COMPLETE THE FIELDS:

PLEASE COMPLETE THE FIELDS:

PLEASE COMPLETE THE FIELDS:

The Form has been sent successfully.

PLEASE COMPLETE THE FIELDS:

PLEASE COMPLETE THE FIELDS:

PLEASE COMPLETE THE FIELDS:

The Form has been sent successfully.

PLEASE COMPLETE THE FIELDS:

PLEASE COMPLETE THE FIELDS:

PLEASE COMPLETE THE FIELDS:

The Form has been sent successfully.