Relationship between velocity and acceleration

Approaches and level of analysis of the physical demonstration of professional soccer players. Level 4 (part 9).

Directly related with last video post, you will see the relationship that is establish between velocity and acceleration demonstrated by soccer players, with data obtained during some analytic drills performed at different intensities and in different conditions (with or without CoD, and with different speeds prior the deceleration), by a spanish veteran soccer player or some professional swiss soccer players during training or games.

As you will see, it seems that the maximum value of acceleration when decelerating is shown with an average velocity value of around 2 and 5 m/s, but not more, what could be interpreted (in absence of more specific data) as if the subjects would need to "slow down" their velocity until they can manage all the mechanical load imposed in their body when performing this short of decelerations.

We have to think that decelerating abruptly with a high quantity of energy accumulated (as with high velocity previous the posterior deceleration) and specially when it is performed suddenly as a response of the needs imposed by the game (during training or matches) is really a hard task directly related with very high forces supported by the body and their main directly implicated systems (as osteoarticular and tendinomuscular systems) just with one leg (when planting the foot on the ground) and not always in a favorable situation (think on degrees of freedom of different articulations, position, ...).

Hope you enjoy it,