**2.1 "Space orientation"and "Ball Possession Sequence"**

The orientation of the space in SSGs is defined as the presence or absence of space targets in which a particular aspect that characterizes these types of games is defined [4]. On the one hand, when there are no goals or no scoring zones and the aim is to keep ball possession, it is called *"non-oriented area"* [12]. On the other hand, when there are goals and/or marking zones, but each team attacks and defends them, it is a game with an *"oriented area"* [12]. Likewise, when goals or scoring zones are located in the field, each team knows which one they are defending and which they are attacking. This aspect aligns the game in a way called *"polarized area"* and forges preferential *"paths of action"* [12, 22]. SSG formats with a non-oriented area encourage players to cover longer distances at higher running speeds, whereas SSGs with a polarized area increase the time in which the ball is out of play [23]. In consonance with these fundamentals, Casamichana et al. [24] obtained a greater cardiac response in non-oriented space tasks when 4 vs. 4 formats (100 m2 per player) with a modification in orientation were compared (**Figure 1**).
