In this blog, I want to talk about the bio-mechanical sequence of the hitters swing. This is the ideal sequence and timing of the motion of each body part during each phase of the swing.

I have spent a lot of years researching bio-mechanics. I have been able to spend the last 6-7 months trying out the latest 3D motion capture tools and techniques.

3D technology has advanced tremendously in the recent years in the baseball and golf industry. Golf is five years ahead of baseball in terms of using the technology for player development. This capability has changed our understanding of the hitters swing bio-mechanics, and it will soon change the way instructors look and teach the baseball swing. This technology has the ability to track the precise movement of every part of the hitter’s body during every millisecond of the hitter’s swing. The traces that comes along with the analysis give us a new understanding of bio-mechanics, and can instantly reveal the underlying cause of the hitter’s swing inefficiencies.

Elite hitters, basically have the same well-timed sequence of movements. They may not know how or know the details, but they learned from a young age how the correct pattern felt.

For optimum performance of the hitter’s swing, there is a precisely timed sequence of body movements. This sequence progresses from  large inner parts of the body,  to the smaller  outer parts. When this sequence and timing are correct, power and speed are created, transferred, and amplified by each segment of the body, up the kinetic chain, to deliver the barrel to the baseball in the most effective way possible.  This precisely timed sequence is also referred to in bio-mechanical literature as kinematic sequence.

The best way to understand the kinematic sequence of the baseball/softball swing, is by considering the movements of the major segments of your body; the hips, torso, arms,  and the barrel of the baseball bat.

You can see the sequence clearly when looking at a graph of the rotational speed of each segment throughout the swing:

The negative rotational speeds indicate the load,  and the positive rotational speeds indicated the swing and follow through.