Why Most Pitchers Lose Velocity, Accuracy, and Arm Health Without Realizing It
One of the biggest mechanical mistakes a pitcher can make is getting into an ipsilateral trunk lean position—aggressively leaning the upper body toward the glove side during the delivery.
When the trunk collapses and leans, everything drops with it. The elbow drops, the arm drags, and the body is forced to pull across itself just to get the baseball back on line to the target.
The result?
❌ Reduced velocity
❌ Poor command and consistency
❌ Increased stress on the arm and shoulder
❌ Loss of forward momentum and power transfer
Instead of directing energy straight toward the plate, the body begins moving side-to-side. That creates timing issues at release, makes it harder to repeat mechanics, and causes the baseball to miss left and right—where the strike zone is actually the smallest.
Elite pitchers don’t create velocity by pulling across their body. They create velocity by driving energy directly toward the target and efficiently transferring force through the kinetic chain.
In this video, Brent Pourciau breaks down:
⚾ Why ipsilateral trunk lean kills pitching performance
⚾ How it affects arm slot and release point
⚾ Why it destroys command and consistency
⚾ The hidden injury risks associated with arm drag
⚾ How elite pitchers maintain posture to maximize velocity and durability
If you’re serious about throwing harder, commanding the baseball better, and protecting your arm, this is a mechanical flaw you cannot afford to ignore.
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