Stamina

How does the stamina skill work?
does it influence the players "Energy recovering speed" or does it purely affect the player during the matches?
Stamina is used only during matches.
During games, players have a tiredness level that increase depending on the distance and the speed they run. (It's not related to their energy level)
When this tiredness level reach a point (that depends on the stamina), player's skills are lowered more and more. That's why you see players run slower at the end of a match.
Does the stamina increase if players are rested?
Stamina can only increase by training it. But resting ur players is recomended as the more tired ur players are the poorer they play
Do the attack speed and defense speed in tactics affect the tiredness of the player during the match?
Guest DPY71D :

Do the attack speed and defense speed in tactics affect the tiredness of the player during the match?

Yes it does along with rythmn