Relationship between decelerations and velocity

Approaches and level of analysis of the physical demonstration of professional soccer players. Level 4 (part 7).

Just in order to let you know some of the findings about decelerations in soccer players, I show you these data in which you see the relationship between acceleration and velocity in accelerated and decelerated runs performed with and without ball (in shuttle sprints of different intensity and in small sided soccer games).

During this and next posts, I'll try to comment about different parameters that affect the performance and the load experienced by the players when decelerating.

Hope you enjoy!

Approaches and level of analysis of the physical demonstration of professional soccer players. Level 4 (part 6).

More about how different softwares show deceleration data.

One more enterprise GPS based for the monitoring of soccer players, and the solution of Roberto Colli group (from Italy).
As you can imagine or really know, there exist more possibilities, but or they are relatively new or their solutions are no so "compact" as these (but attention! Maybe I'm wrong!!!).
Anyway, the idea is just to show you easily the main possibilities and one the latests solutions (that of R. Colli group) which represent a different way of monitoring, not only by it's original approach, but also by it's price.
We just have to be actualized because new solutions are emerging, but remember, what really matters are (in my view), the reliability of the system - enterprise (attention with post-selling technical service), usability (friendly and not time consuming) software, and its utility for each one of you: what do you really want to know from your players - team? Does the software give you as you want? And of course the price ...

In the next post I'll comment something about the relationship between velocity and deceleration.
Stay tunned!

Approaches and level of analysis of the physical demonstration of professional soccer players. Level 4 (part 6).

How different softwares show us deceleration data.

I start with this post a series in which I'll comment different characteristics of decelerations.
It's important to have in mind that as decelerating is a more complex pattern of movement, and there is not too much studies that has deepen in its characteristics, I'll just present you some little and limited research done by myself with data from amateur and professional Spanish and Swiss soccer players, in order to better understand decelerations and its complexity.

In today's post you will see the typical data you get from two actual enterprises based on GPS for the monitoring of soccer players, basically based on absolute values and general zones defined by acceleration customizable thresholds.

In next post you will see more data from two other enterprises, in order to see their similarities and differences.

Stay tuned!

Approaches and level of analysis of the physical demonstration of professional soccer players. Level 4 (part 5).

And we arrive today to the explanation of how to use the proposed algorithm to individualize the analysis of the acceleration demonstrated by the players.

Remember that this data have been obtained monitoring different soccer teams, two professional soccer teams (one Spanish and other Swiss), and one Spanish amateur soccer team.

Basically you will see the process of using this algorithm, that relate acceleration with velocity, but have in mind that if you use it, it is nothing else than an "average" of data of a good quantity of soccer players, so if you really want to individualize this short of analysis, you should get your own data from each of your players.

So this is just a "guide" to use when, for example, you start to get data from your players, but you have no previous data for having a reference, as when starting a preseason with new players, ...

Hope you enjoy,

Approaches and level of analysis of the physical demonstration of professional soccer players. Level 4 (part 4).

Approaches and level of analysis of the physical demonstration of professional soccer players. Level 4 (part 4).

Following the last post, we arrive to the practical application of this relationship between velocity and acceleration when performed by professional and amateur soccer players, in the control of the conditional load, and also the characteristics of the slope of this relationship, which show us if the ability of the soccer players between acceleration and velocity are balance or not, in order to use it for individualizing some content of our trainings.
You will see the average data of this parameters of two professional soccer teams from different countries (Spain and Switzerland), and also including an Spanish amateur soccer team, which at the end are under the same values.

This data is the key factor for individualizing the control of accelerations demonstrated by the soccer players which until now are just taken in account as absolute values with absolute thresholds (accelerations over 1m/s/s, over, 2m/s/s, etc), that doesn't allow us to correctly interpret the real intensity of an acceleration.
Imagine an absolute value of an acceleration of 2,5 m/s/s performed with an initial velocity of 0 km/h (so from an standing start) or another of the same value performed with an initial velocity of 15 km/h (a change of rhythm) ... Same absolute value, but completely different relative intensity of the acceleration performed!

Enjoy,