I was told by a great coach that at most you can only remember 2 points of emphasis while doing an athletic play like hitting or pitching so that was my point of emphasis when I coached. In softball 1 was always the situation and what was the smart play; the other was usually a mental image to focus on that will help them succeed in making the smart play. I always cringed when I would hear 3 or 4 different points being shouted from a dugout to a single player and then you would have coach mom or dad chip in from the stands too. My head would explode.
Two words:
Muscle Memory.
So much of sports is muscle memory resulting from reps, and more reps, and more reps, and more reps.
You dont get those reps in the games, you get them in practice and on your own.
That is why I am absolutely hating how youth baseball and softball has evolved. They are playing more games, but getting much less practice.
Less practice = less reps.
Less reps = less muscle memory.
Less muscle memory = less ability.
There is a reason why our HoF coach would have 2 hour practices before games often times in the summers. He would say playing games is great, but that also takes away from practice time and without practice we lose that edge of working on the little things that make us better ball players.
Kid can play 4-8 games in a 3 day period nowadays. BP? Just soft toss, or those dead balls they use. INF/OF? Those garbage ground balls in foul territory often times on turf that makes it so easy their grandma's could field it.
With time limits 2-3 AB a game. How many legit pitches are to hit per game? Swings per game? Ground balls per game?
Kids would be MUCH, MUCH, MUCH better off if they cut their games in HALF (or more), and dedicate more time to practice either with the team or individually.
Off my soapbox now....