According to science, hitters and pitchers are objects that possess energy, and use it in the form(s) of potential, kinetic, elastic, and mechanical energy. Basically, you must create and transfer energy from yourself into the baseball.
BREAKING IT ALL DOWN
Every training technique and performance result is effected by energy flow. Optimize what it takes to create and move energy, so you can maximize your performance.
1. You possess energy, and its capabilities are enhanced by gravity and how efficient you transfer energy through your joint axis points (knees, elbows, ankles, etc).
2. F=MA is the #1 concept you need to know about energy and how to move it effectively. F is force. M is mass. A is acceleration. Basically, the more you accelerate yourself and the bigger or stronger you are - the more force you can apply. The result is a higher energy flow into the baseball. And we all know what this accomplishes. This is ALL according to scientific theorem - not theory.
3. Although F=MA is the root concept, there are factors that play heavily upon how energy transfers from you into the baseball. According to Newton, for every action there is an equal and opposite reaction. Basically, you must be proportionate in both movement length AND movement plane to maximize energy's flow and transfer. This creates balanced force (think of tug-of-war).
4. Since you have to move energy from your lower half (horizontally) and change its direction (upwards into your trunk), there are transfer station requirements. These are your hips and shoulder(s). How strong and and whether they sync the timing of energy transfers is extremely important.
5. According to Newton's Laws, a counteracting force must be applied to energy's direction that is equal and opposite of the existing direction of energy - if you want efficient transfer rates.
In layman's terms, if you are moving energy into your upper half, you must create a transfer point that changes energy's direction. This is your rotating hips, and they act like a fulcrum (as in a seesaw).
If you want to move energy from this vertical direction into a horizontal direction (towards the catcher), you need another axis (or fulcrum) point - your shoulder and elbow movements. This again, is according to scientific theorem that cannot be refuted.
THE LAW OF DISSIPATION OF ENERGY
According to this physics law, energy cannot be destroyed, and it exists in everything. To start the existing energy your body possesses, you need to apply a force to it (according to Newton's Laws of Motion).
The issue is that energy cannot be destroyed and will move into the path of least resistance. This can be seen in electrical energy wherein transformers produce energy, but it needs to be downgraded before the consumer uses it.
If this electrical energy is not downgraded, it will explode through the path of least resistance when escaping. The results can be devastating. And the same concepts can be seen when energy overloads body parts - resulting in labrum tears, cuff tears, tendonitis, and more.
Let's examine why the same mechanical issues exist across all athletes and sports:
1. Blown hips, prematurely rotating hips, slow or lazy hips.
2. Drag arm, soft front knees that do not straighten after flex.
3. Diving heads, unsynced upper and lower halves.
The above issues cause every performance deficiency - from long swings to unbalanced athletic moves. They are the ROOT cause of everything gone wrong.
Reason being is that energy is trying to dissipate, and it goes into the path of least resistance. According to kinesiology, physiology, and load physics - this "path of least resistance" comes in the form of an opposite movement plane. Hence - a SUBCONSCIOUS premature rotation.
The above issues can also overload an existing movement plane. For example, a front knee that never straightens to push energy upwards.
These are all subconsious occurances that cannot be changed or refuted, unless energy flows are redirected, optimized, and proportionate.
Your kinetic chain reaction is basically a domino effect. Meaning, if one domino is out of line, the rest will not fall properly. This is a visual upon how energy is working through a series object(s) - which are your body parts.
Concerning baseball, if you have an energy overload, energy must dissipate somehow, and usually it moves downward or sideways - always finding the path of least resistance. The reason energy works in these directions is because of gravity.
This can be seen in Olympic sprinters at the finish line, wherein they cross the line and then you see arms and legs moving irratically sideways. This is energy dissipating due to overloading joint axis points.
WHAT CAUSES AN ENERGY OVERLOAD?
If energy loads are too high in one movement plane, it will overload the opposite body part. The result is a sideways movement that is both subconscious AND the path of least resistance.
If you create too much force with your back hip, you must have enough strength to reflect or refract the energy upwards into your top half. This is why hip rotation and its sync to energy transfer is so important.
According to scientific theorem, your brain tells your body what to do and how to react. But it can only do so IF you have experienced the activity before. This is why practice is required.
However, according to the Bernstein and SAID Principles, if your body has never experienced the activity, your brain compensates and/or protects with protective reflex response.
In baseball terms, no matter what a coach is trying to teach you, if your body has never moved energy efficiently OR does not know how to do it properly - you will never be able to accomplish it. You may get better at it, but you will not peak the performance.
And this is the greatest asset that VeloPRO's VL Harness gives you - sensory feedback that peaks motor patterning to optimize energy flow.