Which is the need to say “Put your head in”?

The daily routine of training shows that there is still too much distance in the coaches’ teaching between mind and body. Saying “put your head into it” is indicative of an approach whereby the coach provides the exercises to be performed and trains the body while concentration rather than motivation depends on the athlete.

Because no coach ever says “put your coordination” or “put your technique” before an exercise. Coaches know that with the motor repetition any skill will be learned and therefore they follow this rule. The same does the school teacher when explaining a subject and assuming that if the students have been focused they will learn.

This approach reveals a biomechanical conception of motor learning: I tell you the right things to do, with the difficulty appropriate to your level of learning, you repeat as many times as necessary, I correct you and at the end of this type of interaction you will learn.
The problem is that between the coach’s stimulus and the athlete’s response there is the mind; this entity that for many coaches is a little known concept and is often considered analogous to the will. So if you have difficulty is because you lack some mental capacity or “do not want”, so it lacks the will.

Maybe I exaggerated a little bit but I have no other explanation to describe the reason why the phrase “put your head in it” is still so often used today.