Pain Changes the Throw: How Neurological Constraints Can Alter Baseball and Softball Throwing Mechanics

Kathy Ryan-Ceisel, PT MHS | Algonquin Sports PT

Overhead Throwing Expert-Athletic Edge and Wellness Edge

Have you ever watched a baseball or softball player continue throwing despite shoulder soreness, elbow discomfort, or tightness in their arm? They may tell you the pain is minor, that it goes away after warming up, or that they can still throw just as hard.

But there may be something happening that neither the athlete nor the coach recognizes: The athlete's body may already be changing the way they throw.

Pain is more than a symptom. It is information processed by the nervous system, and it can influence how the brain controls movement, coordinates muscles, and produces force.

When an athlete experiences pain, soreness, or discomfort, the nervous system may modify the throwing motion to protect the affected area. These changes can happen automatically, without conscious thought or an obvious change in performance.

The athlete may still be able to throw a baseball or softball, but they may no longer be using the same movement strategy. This is called a neurological constraint—a limitation or alteration in movement control influenced by the nervous system.

Understanding how pain changes movement is important when evaluating throwing athletes because treating the painful area alone may not restore the movement patterns needed for efficient, healthy throwing.

What Are Neurological Constraints?

The nervous system controls how we move. It coordinates muscle activation, joint positioning, timing, balance, and force production to accomplish a specific task.

Every time a baseball or softball player throws, the brain and nervous system coordinate hundreds of muscular and joint actions throughout the body.

When pain or the anticipation of pain enters the equation, the nervous system may change that coordination.

These changes can include:

• Inhibiting or reducing the contribution of certain muscles.

• Increasing activity in other muscles to compensate.

• Changing the timing and sequencing of muscle activation.

• Limiting joint movement or available range of motion.

• Altering balance, coordination, and force production.

• Changing the movement strategy to avoid a painful position.

The important thing to understand is that these changes do not necessarily happen consciously.

The athlete isn't thinking, "I need to change my arm slot because my shoulder hurts." Instead, the nervous system may automatically select a different movement strategy that allows the athlete to continue throwing with less discomfort.

Research on pain and motor control describes this as a protective adaptation. It may provide a short-term benefit, but when the altered movement pattern persists, it can have unintended consequences.

How Pain Changes the Throwing Motion

Throwing a baseball or softball is a highly coordinated, full-body movement. Force is generated through the legs and hips, transferred through the trunk, and delivered through the shoulder, elbow, forearm, wrist, and hand.

Each segment contributes to the timing and efficiency of the throwing motion.

When one area becomes painful or restricted, the body may adjust other parts of the movement to compensate.

Let's look at some examples.

1. Changes in Arm Slot and Shoulder Position

A pitcher experiencing shoulder pain or discomfort may unconsciously change the position of the throwing arm.

They may:

• Drop their arm slot or move toward a lower sidearm position.

• Raise the arm into a higher throwing position.

• Change shoulder abduction or horizontal positioning.

• Alter the amount of shoulder external rotation during the cocking phase.

• Change the timing of arm positioning relative to trunk rotation.

These adjustments may help the athlete avoid a position that produces discomfort. However, changing the arm position also changes the relationship between the shoulder, elbow, and trunk. This can alter the way forces are distributed through the throwing arm.

For example, a change in arm slot combined with altered trunk positioning may influence the forces experienced at the shoulder and elbow. An athlete may still be throwing strikes and maintaining velocity, but the mechanics used to accomplish that task may have changed. this can create abnormal load on tissues that can ultimately lead to pain.

2. Changes in Elbow Position and Forearm Rotation

The elbow and forearm play an important role in transferring force during throwing. An athlete experiencing medial elbow pain, forearm tightness, or discomfort around the UCL may modify how the elbow and forearm move.

Potential adaptations include:

• Changing elbow flexion and extension timing.

• Altering forearm rotation.

• Changing the position of the forearm during late cocking.

• Modifying the relationship between the elbow and shoulder at ball release.

• Changing the timing of arm acceleration.

These changes may allow the athlete to continue throwing while reducing discomfort in a particular position. However, the elbow is exposed to substantial forces during high-velocity throwing. Changes in the timing and coordination of the kinetic chain can influence how those forces are distributed to the structures at the elbow.

3. Changes in Wrist Position and Ball Release

The wrist and hand are the final links in delivering the ball. Pain or discomfort in the wrist, forearm, or elbow can influence how an athlete positions the wrist and hand during acceleration and release.

An athlete may:

• Change wrist flexion or extension.

• Alter the timing of wrist movement.

• Modify forearm pronation or supination.

• Change finger pressure or grip on the ball.

• Release the ball from a slightly different position.

These adjustments may be subtle and difficult to recognize with the naked eye.

Even small changes in timing and coordination can influence ball release, command, and consistency.

The athlete may describe the problem as having difficulty locating pitches or feeling like the ball is coming out differently, without recognizing that the movement strategy has changed.

4. Changes in Trunk Rotation and Lower-Body Contribution

The throwing motion doesn't begin at the shoulder. It begins with the lower body.

The legs and hips generate force, the pelvis and trunk help transfer that force, and the upper extremity delivers the ball.

If an athlete experiences low-back, hip, abdominal, or lower-extremity pain, they may unconsciously change their stride, pelvic rotation, trunk position, or timing.

For example:

• Reduced hip rotation may change pelvic positioning.

• Discomfort during trunk rotation may cause the athlete to rotate earlier or later.

• Reduced lower-body contribution may cause the athlete to rely more heavily on the throwing arm.

• Changes in stride length or direction may alter the timing of trunk rotation and arm acceleration.

This is especially important because throwing is a kinetic-chain activity.

A restriction or change in one area can influence movement elsewhere.

The shoulder and elbow do not operate independently of the rest of the body.

The Short-Term Benefit vs. the Long-Term Consequences

Why does the body make these changes?

The nervous system is designed to protect us. When a movement produces pain or is perceived as threatening, the brain may choose an alternative strategy that allows the task to continue. In the short term, this can be helpful.

A baseball player with shoulder soreness may adjust their arm position to continue practicing. A softball pitcher with forearm discomfort may change their release or timing to avoid a painful position.

The athlete may continue playing because the new movement strategy temporarily reduces discomfort. But there is a potential downside.

The body may solve one problem by creating another movement problem.

When an athlete repeatedly uses a compensatory movement pattern, the distribution of muscular activity and mechanical loading can change.

Over time, this may contribute to:

• Increased demand on muscles and tendons that are compensating.

• Greater or differently distributed stress through the shoulder or elbow.

• Increased workload on the forearm and wrist.

• Muscle fatigue and reduced muscular endurance.

• Altered joint loading.

• Recurring muscle strains or tendon irritation.

• Increased susceptibility to overuse problems when combined with high throwing workloads and inadequate recovery.

• Reduced performance parameters; decreased velocity, decreased control/command, increased fatigue, less capacity.

For example, a pitcher with shoulder discomfort may change their arm position and trunk timing. Although this may temporarily reduce shoulder symptoms, the altered movement strategy could change the demands placed on the medial elbow or forearm.

This does not mean that every change in throwing mechanics will cause an injury. It means that persistent compensations can change how the body handles the repetitive demands of throwing.

The concern is especially important for athletes who throw hundreds of times throughout a season.

A movement change that seems insignificant during one practice may become more relevant when repeated over weeks or months of throwing.

Pain Isn't Always Present When the Movement Problem Continues

One of the biggest mistakes athletes, parents, and coaches can make is assuming that once the pain goes away, the movement problem is gone.

Pain relief and movement restoration are not necessarily the same thing.

An athlete may no longer experience shoulder or elbow pain but may continue using the compensatory movement strategy they developed while injured.

The nervous system can learn and reinforce a movement pattern. If the athlete repeatedly practices throwing with altered timing, positioning, or muscle coordination, that pattern can become familiar.

This means an athlete can be:

• Pain-free but still demonstrating altered throwing mechanics.

• Stronger but still lacking proper movement coordination.

• Cleared to throw but not fully prepared for their previous workload.

• Able to throw with, but lacks previous velocity

• Unable to maintain efficient mechanics as fatigue develops.

This is why rehabilitation should address more than pain and isolated muscle strength. The goal is to restore the athlete's ability to move, coordinate, and tolerate the demands of throwing.

What Is the Best Treatment for Pain-Related Movement Changes?

The best approach is to identify why the athlete is changing their movement in the first place.

Simply telling an athlete to keep their elbow up, stay on top of the ball, or maintain a particular arm slot may not solve the problem. If the athlete lacks shoulder mobility, hip rotation, trunk control, strength, or muscular endurance, they may not have the physical capacity to perform the desired movement.

Likewise, if pain is still influencing the nervous system, the athlete may struggle to maintain the movement pattern even when coached. Treatment should address both the physical constraints and the mechanical changes.

1. Identify and Address the Source of Pain

The first step is determining what is causing the pain or discomfort.

A comprehensive physical therapy evaluation should assess the shoulder, elbow, wrist, spine, hips, and lower extremities as appropriate.

The evaluation may include:

• Joint mobility and range of motion.

• Muscle strength and endurance.

• Rotator cuff function.

• Scapular strength and control.

• Trunk and hip mobility.

• Neuromuscular coordination.

• Symptom response to throwing-related movements.

The athlete's throwing history, recent workload, recovery, and symptom behavior should also be considered. An athlete with persistent pain should not simply throw through it or attempt to correct mechanics without first understanding the underlying problem.

2. Restore Mobility and Physical Capacity

Once the primary impairments have been identified, rehabilitation should address the physical limitations contributing to the altered movement pattern.

Depending on the athlete's evaluation, treatment may include:

• Shoulder, thoracic spine, and ankle mobility.

• Hip internal and external rotation mobility.

• Trunk rotation and control.

• Rotator cuff strengthening and endurance.

• Scapular stabilization.

• Forearm and wrist strength.

• Core and lower-extremity strengthening.

• Single-leg stability and balance.

• Neuromuscular coordination and movement retraining.

The objective is not simply to make an athlete stronger. It is to improve their ability to produce, transfer, and control force throughout the entire kinetic chain.

3. Retrain the Throwing Movement

Restoring strength and mobility is only part of the process.

The athlete must also relearn how to coordinate the movement.

This may include:

• Improving timing between the lower body, trunk, and throwing arm.

• Restoring appropriate arm positioning.

• Improving scapular and shoulder control.

• Developing better deceleration capacity.

• Reintroducing throwing movements at an appropriate intensity.

• Improve lower body loading and power development.

• Progressively rebuilding throwing volume and workload.

Throwing should be reintroduced based on symptoms, clinical findings, tissue healing when applicable, and the athlete's demonstrated readiness.

The goal is to restore the ability to throw efficiently without relying on compensatory movement strategies.

How Can We Identify These Problems? The Importance of Movement Screening and Overhead Video Assessment

One of the challenges with neurological constraints is that many of the changes are difficult to see without a more comprehensive evaluation.

An athlete may look normal during warm-ups, demonstrate good strength during isolated exercises, and still have movement limitations that become apparent during throwing.

This is why a combination of physical movement assessment and throwing analysis is valuable.

At Athletic Edge & Wellness, we look at two important components: physical constraints and mechanical constraints.

1. SCORE Movement Screen: Identifying Physical Constraints

The SCORE movement assessment evaluates how the athlete's body moves and identifies physical limitations that may interfere with athletic performance.

The assessment looks beyond the location of pain to evaluate how different areas of the body contribute to movement.

Areas of evaluation may include:

• Mobility limitations.

• Strength deficits.

• Left-to-right asymmetries.

• Hip and trunk movement.

• Shoulder mobility and stability.

• Balance and single-leg control.

• Movement coordination and body mechanics.

For a baseball or softball player, a limitation in hip rotation, trunk mobility, shoulder strength, or scapular control may influence the athlete's ability to execute an efficient throwing motion.

The purpose is to identify areas that may be restricting movement and determine which physical limitations should be addressed through individualized treatment and performance training.

You cannot effectively address a movement limitation until you identify it.

2. Overhead Video Assessment: Identifying Mechanical Constraints

A movement screen tells us how the athlete's body moves. An overhead video assessment helps us understand how those physical abilities translate into the actual throwing motion.

Using slow-motion video analysis, we can evaluate the throwing sequence and identify mechanical changes that may not be obvious at normal speed.

Depending on the assessment, we may examine:

• Stride direction and length.

• Lower body loading and control

• Pelvic and trunk rotation.

• Timing of trunk rotation relative to foot contact.

• Arm positioning and arm slot.

• Shoulder and elbow positioning.

• Forearm rotation.

• Ball release and follow-through.

• Deceleration mechanics.

This allows us to look for differences in movement patterns and identify areas where the athlete may be compensating.

For example, a player may demonstrate adequate hip mobility during a physical examination but fail to use that available motion effectively during the throwing sequence.

Another player may demonstrate a change in arm slot that is associated with shoulder discomfort or altered trunk positioning.

The goal isn't to force every athlete into the same throwing mechanics. It is to identify modifiable limitations and understand how the athlete's body is producing the throwing motion.

3. Combining Both Assessments: Looking at the Complete Picture

The greatest value comes from combining the physical movement screen with the overhead video assessment.

Physical Assessment	Throwing Video Assessment
Identifies mobility restrictions	Identifies movement changes during throwing
Evaluates strength and endurance	Evaluates timing and sequencing
Identifies asymmetries	Evaluates arm slot and positioning
Assesses balance and stability	Evaluates trunk and lower-body contribution
Identifies physical constraints	Identifies mechanical constraints

Together, these assessments help us understand whether a physical limitation may be contributing to an altered throwing pattern.

They also help guide an individualized rehabilitation or performance program.

The objective is to address the reason behind the movement change rather than simply correcting what appears different on video.

The Bottom Line: Don't Just Treat the Pain. Restore the Movement.

Pain, soreness, and discomfort can influence how the nervous system controls movement. For baseball and softball players, those changes may affect arm slot, shoulder positioning, elbow mechanics, wrist movement, trunk rotation, and the timing of the entire throwing sequence.

An athlete may continue throwing without realizing that their body has changed the way it produces and transfers force.

Although these adaptations can provide short-term protection, persistent compensations may change tissue loading and contribute to recurring symptoms and overuse problems.

That is why successful rehabilitation should go beyond making the pain disappear.

At Athletic Edge & Wellness with our partner at Illinois Baseball Edge

, our approach looks at the entire athlete. Through individualized physical therapy, SCORE movement assessment, and overhead video analysis, we work to identify physical limitations, understand mechanical changes, and develop a plan to restore movement and build the capacity needed for throwing.

Don't just get out of pain.

Get back to moving, throwing, and performing better.

Is Your Throwing Motion Changing?

If you are a baseball or softball player experiencing shoulder pain, elbow discomfort, forearm tightness, or a change in throwing performance, don't ignore the signs.

A comprehensive evaluation can help identify the physical and mechanical factors influencing your throwing motion.

Schedule your evaluation at Athletic Edge & Wellness in Algonquin, Illinois.

224-505-3343 or www.edge360wellness.com

Move Better. Perform Better. Be Better.