1BDad;
My son Robert and I have conducted clinics and tryouts in China, Australia, Japan and USA.
At all tryouts we looked for running speed; bat speed and arm speed. It is important that the above is without effort.
The individual player can increase "bat speed"; "running speed" and "arm speed". It can be achieved, but not in one day, one week or one month. "Learn the game"!!
PS: can you son do the splits at 1B?
Enjoy the trip.
Bob Williams