Coaching experience
The ability to adjust the training load and the ability to understand the athlete are big challenges.
It is easier for a coach who is a former professional athlete to know the problems related to injuries, training too hard, and problems with motivation.
All this is known only too well.
Experienced for yourself.
However, years of coaching experience allow you to learn to translate your own experience into meeting the needs of the player and sometimes solving his/her problems.
A player is always an individual and unique unit.