Approaches and level of analysis of the physical demonstration of professional soccer players. Level 2 (part 6).

Usually, impacts coming from triaxial accelerometer (A3X) data is used in different ways: the most simple is just to count the total number of impacts over a defined threshold (between 2 and 5 G, that is number of times the value of the Gravity, around 9'8 m/s/s), or using some arbitrary units to give a different value to each impact; that means that lower impacts has less "weight" on the load the player is experiencing, and higher impacts has much more "weight".
But I want to comment another parameter that I have been using for a long time. This parameter is the relationship between the number of impacts over 5G and the number of accelerations demonstrated by the player (as typically the impacts are mainly related with the decelerations, and acceleration and deceleration should be related ... (this is not exactly like this, but in 2006 - 2007 there was no possibility to use deceleration ... and sometimes you can see higher impacts when accelerating ...).

You will see some data obtained from friendly games of professional soccer players, comparing first and second time, and also depending on the positional roles.

Enjoy it,