Presentation Title

The Relationship Between Scapular Orientation and Ball Velocity or Shoulder Kinetics

Advisor Information

Dr. Brian Knarr

Location

MBSC Ballroom - Poster #803 - G

Presentation Type

Poster

Start Date

4-3-2022 9:00 AM

End Date

4-3-2022 10:15 AM

Abstract

The scapula plays an integral role in transferring velocity, energy and forces from lower to upper extremity. Abnormalities in scapular orientation throughout movement may lead to decreased performance or pathomechanics. There are few data identifying scapular orientation during the pitching motion.

Assessment of specific joint contributions to global shoulder movement during baseball pitching is limited by challenges of accurately measuring dynamic scapular orientation. A recently validated individualized linear model approach that estimates scapular orientation throughout the pitching motion provides researchers with an opportunity to understand how the ST joint is oriented and its relationship to kinetic parameters of the pitching motion.

This research sought to identify relationships between ST kinematics and ball velocity or kinetic parameters in collegiate pitchers. This will help researchers identify specific joint contributions to global shoulder orientation and how they relate to performance or pathomechanics during the pitching motion.

Individualized models were constructed for 22 collegiate pitchers (15 early specializers and 7 late specializers) by estimating ST and GH contributions to measurable humerothoracic (HT) orientations at static arm postures captured within each individual’s throwing motion [3]. Ball velocity was measured with a radar gun and kinetics were measured using force plates.

Results of Spearman rank correlation tests indicated no significant relationships between ST kinematics at ball release (BR) nor max external rotation (MER) with ball velocity. Results did indicate significant relationships between ST posterior tilt at BR and MER with peak shoulder distraction force, however, no other significant relationships were present.

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COinS
 
Mar 4th, 9:00 AM Mar 4th, 10:15 AM

The Relationship Between Scapular Orientation and Ball Velocity or Shoulder Kinetics

MBSC Ballroom - Poster #803 - G

The scapula plays an integral role in transferring velocity, energy and forces from lower to upper extremity. Abnormalities in scapular orientation throughout movement may lead to decreased performance or pathomechanics. There are few data identifying scapular orientation during the pitching motion.

Assessment of specific joint contributions to global shoulder movement during baseball pitching is limited by challenges of accurately measuring dynamic scapular orientation. A recently validated individualized linear model approach that estimates scapular orientation throughout the pitching motion provides researchers with an opportunity to understand how the ST joint is oriented and its relationship to kinetic parameters of the pitching motion.

This research sought to identify relationships between ST kinematics and ball velocity or kinetic parameters in collegiate pitchers. This will help researchers identify specific joint contributions to global shoulder orientation and how they relate to performance or pathomechanics during the pitching motion.

Individualized models were constructed for 22 collegiate pitchers (15 early specializers and 7 late specializers) by estimating ST and GH contributions to measurable humerothoracic (HT) orientations at static arm postures captured within each individual’s throwing motion [3]. Ball velocity was measured with a radar gun and kinetics were measured using force plates.

Results of Spearman rank correlation tests indicated no significant relationships between ST kinematics at ball release (BR) nor max external rotation (MER) with ball velocity. Results did indicate significant relationships between ST posterior tilt at BR and MER with peak shoulder distraction force, however, no other significant relationships were present.