The aim of the batter is to strike or hit the ball. A well hit ball will travel faster and farther than one not well hit.
The Swing
The bat should be swung as a pendulum, held dangling in your hands. Raising the bat will cause gravity to exert an attraction drawing the bat to the ground creating the sensation of weight. In releasing the tension holding the bat up, the bat falls and feels less heavy. The equal and opposite force of the down swing will cause the bat to rise in your hands, the upswing. Notice the greatest exertion so far is in raising the bat.
With the bat dangling and swinging notice that with little effort you can cause the bat to speed up exerting very little energy. A little stride on the down swing will cause the bat to gain more speed and force in the swing. A little hip rotation will also cause the bat to move faster and thus create more force. A little wrist push will also cause the bat to move faster.
If we combine all three (stride, turn and wrist), we can generate great speed and force in the bat's movement with very little effort.
Notice now, that the weight of the bat head in motion is greater than our wrists can fully control . Our wrists 'break', allowing another additional force on the bat causing it to speed up and create greater force.
Notice that the bat will go in the direction that the hands move it in starting the bat in motion.
These are the primary mechanics of the swing in baseball.
Choosing a Bat
Using the above technics to generate bat speed, the lighter the bat, the faster the swing. The heavier the bat, the greater force generated at impact.
One now wants to seek out that bat that will allow the greatest bat speed while generating the maximum force at impact.
This can be done in many ways. There are labs or sports clinics where the speed of your swing can be measured as well as the force of impact. One can also use trial and error on a field hitting balls with various lengths and weights of bats.
Using the proper bat and the proper mechanics will generate the greatest bat speed and the greatest force at impact.
The Stance
The stance is simply the way you stand while waiting for the pitched ball.
The first thing about your stance will be finding that spot around or above your shoulder where you want to hold the bat.
The next thing you want to find is the angle that you should hold the bat so that it feels lightest and easiest to control.
Once you have decided how you will hold the bat take practice swings just swinging the bat in the air at an imaginary ball.
Once you start the bat in motion, it should feel lighter and easy to swing without resistance.
Practice your swing until you can hear the bat cut the air (it will make a slight sound).
REMEMBER
Never aim the bat head at the ball or try to guide the bat head.
Swing your hands at the ball and you will find that the bat will follow.
Always complete the swing with the follow through.
If possible, never hit off a Tee. Always try to hit with live pitching or a pitching machine.
There are no home runs in the batting cage. No matter how good the contact feels, only hitting on the field will show you the actual results.
If working out alone is the only option at times, use some form of a hit away device. (a ball on a rope)
In batting practice, always aim for the opposite gap. The pitcher is throwing so you can hit the ball. Don't be a batting practice home run king.
Into Action
Break down the swing into four parts. Pick up a bat and try this.
1) Generate bat speed simultaneously using the stride, wrist and hip rotation in the first quarter of the swing. Now relax.
2) In the second phase of the swing, the bat is at great speed until the bat is forced to turn in the hands thus the wrist break (prefferably right over the plate) again increasing speed.
3) The bat is now a projectile being affected by centripetal forces. Still relaxed, allow the bat (now at its greatest accelleration) to make contact with the ball.
4) Followthrough, decreasing the speed of the bat with your arms and hands.
This 'relaxed swing' will allow the greatest creation of bat speed and thus force at impact. The quality of the contact made will determine the final result.
The key is to relax in the swing. You can't hit and think at the same time.
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