Fitness is a component of training, the same way technical and tactical drills are a component of training and not done directly by the manager who delegates those activities after having established training plans with his staff. Physical trainers are subalterns of the head coach, they do things based on his requirements.No it’s not. Like transfers and transfer fees are not down to managers. The reason we are hiring all these different professionals is because the conventional idea of a manager has changed dramatically.
They don’t decide who is fit. They don’t decide who joins a club. They don’t personally work on a players fitness. They may have some involvement but they rely moreso on the quality of the people around them to help them be able to focus on managing the players and tactics.
So , no , managers aren’t to blame for players fitness.
And yes managers do decide who is fit or not, based on tracking data and feedbacks from their staff and players, they decide whether a player should be rested or not. Some of you seem to think that managers do nothing, that they are responsible for nothing, they are in charge of no one and staff members are just doing their thing independently.
Now someone could mess up or a player could lie or something unpredictable can happen but a manager is responsible for the fitness of his team, the same way he is responsible for the tactical or technical development of his team including his goalkeepers even if he isn't a goalkeeper coach because it is the responsibility of the staff that he is leading and assembled.