Navigation Links
Shoulder injuries in baseball pitchers could be prevented with 3-D motion detection system

MAYWOOD, Ill. -- A new 3-D motion detection system could help identify baseball pitchers who are at risk for shoulder injuries, according to a new study.

The system can be used on the field, and requires only a laptop computer. Other systems that evaluate pitchers' throwing motions require cameras and other equipment and generally are confined to indoor use.

Loyola University Medical Center sports medicine surgeon Pietro Tonino, MD, is a co-author of the study, published in the journal Musculoskeletal Surgery.

In a well-rested pitcher, the humerus (upper arm bone) and the scapula (shoulder blade) move in concert when one bone moves, the other moves with it. This is called the scapulo-humeral rhythm. But after a pitcher has been on the mound for a while, his muscles begin to tire, and the scapulo-humeral rhythm begins to deteriorate. The bones no longer move in synch, and this can lead to shoulder injuries.

Using just the naked eye, it is extremely difficult for a coach to detect subtle changes in a pitcher's scapulo-humeral rhythm. But such changes can be easily detected with a portable tracking system called the Xbus Kit. Sensing units are positioned on the pitcher's scapula, humerus, forearm and sternum, and information is gathered from 3D gyroscopes, 3D magnetometers and 3D accelerometers.

Researchers enrolled 13 Chicago-area college pitchers in the study. For each pitcher, the system tracked the scapulo-humeral rhythm three times: Before pitching, after throwing 60 pitches and 24 hours after a pitching session.


  • Only 2 pitchers (15.5 percent) showed similar measurement at all three sessions.

  • Five pitchers (38.5 percent) showed deterioration in the scapulo-humeral rhythm after pitching, but the rhythm was completely restored at 24 hours.

  • Three pitchers (23 percent) showed deterioration after pitching. After 24 hours rest, their scapulo-humeral rhythm was improved, but still not completely restored.

  • Three pitchers (23 percent) showed deterioration in the scapulo-humeral rhythm after pitching, and the deterioration persisted even after 24 hours. This group appears to be the most at risk for shoulder injuries, Tonino said.

The study demonstrates the feasibility of using the portable tracking system to identify college-age pitchers who are at risk for shoulder injuries. To prevent such injuries, Tonino said at-risk pitchers could undergo strengthening exercises and physical therapy.

Tonino has surgically repaired thousands of shoulder injuries. But even the most successful surgery and rehabilitation cannot completely restore a shoulder to the full function the player had before the injury. Therefore, the best strategy is to prevent injuries, and the motion tracking system can help in that effort, Tonino said.

Tonino and colleagues next plan to test the tracking system on Little League pitchers.

Tonino is Loyola's Program Director of Sports Medicine. He is a professor in the Department of Orthopaedic Surgery and Rehabilitation at Loyola University Chicago Stritch School of Medicine.


Contact: Jim Ritter
Loyola University Health System

Related medicine news :

1. Shoulder Workout Routine for Mass Video Including Best Shoulder Exercises Released by Muscle Building Expert
2. Non-surgical treatment of common shoulder injury may increase chances of return-to-play
3. Mid-America Hand to Shoulder Clinic Offers Tips for a Safe Fourth of July
4. KORT Physical Therapist Says Shoulder Pain Shouldn’t Be Ignored
5. New standards for treating traumatic shoulder injuries to improve patient care
6. Help Young Pitchers Avoid Overuse Injuries
7. Running Right This Spring to Avoid Common Injuries
8. Boston Bombing Injuries Like a War Zone
9. As Tennis Season Opens, Don't Let Injuries Ruin Your “GAME, SET AND MATCH”
10. Research sheds new light on traumatic brain injuries
11. Vaginal Mesh Lawsuit Filed by Wright & Schulte Claims Nebraska Woman Sustained Painful Injuries Allegedly Due to Defective Vaginal Mesh Implants
Post Your Comments:
(Date:6/26/2016)... ... June 26, 2016 , ... ... have been diagnosed with endometriosis. These women need a treatment plan to not ... comprehensive approach that can help for preservation of fertility and ultimately achieving a ...
(Date:6/25/2016)... , ... June 25, 2016 , ... Austin residents seeking ... American College of Mohs Surgery and to Dr. Russell Peckham for medical and surgical ... effective treatment for skin cancer. The selective fellowship in Mohs Micrographic Surgery completed by ...
(Date:6/25/2016)... ... June 25, 2016 , ... "With 30 hand-drawn hand gesture animations, FCPX ... Austin - CEO of Pixel Film Studios. , ProHand Cartoon’s package transforms over ... Cut Pro X . Simply select a ProHand generator and drag it above media ...
(Date:6/25/2016)... Beach, CA (PRWEB) , ... June 25, 2016 , ... ... UCLA with Magna Cum Laude and his M.D from the David Geffen School of ... Diego and returned to Los Angeles to complete his fellowship in hematology/oncology at the ...
(Date:6/25/2016)... ... ... On Friday, June 10, Van Mitchell, Secretary of the Maryland Department of Health and ... their exemplary accomplishments in worksite health promotion. , The Wellness at Work Awards took ... the BWI Marriott in Linthicum Heights. iHire was one of 42 businesses to receive ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 ... CAPR ), a biotechnology company focused on ... today announced that patient enrollment in its ongoing ... Duchenne) has exceeded 50% of its 24-patient target. ... in the third quarter of 2016, and to ...
(Date:6/23/2016)... INDIANAPOLIS , June 23, 2016 /PRNewswire/ ... Diabetes Tomorrow,s Leaders Scholarship is any indication, the future ... today online at by the Diabetes ... stand in the way of academic and community service ... scholarship program since 2012, and continues to advocate for ...
(Date:6/23/2016)... June 23, 2016 The vast majority of ... dialysis facility.  Treatments are usually 3 times a week, ... visit, including travel time, equipment preparation and wait time. ... especially grueling for patients who are elderly and frail.  ... nursing and rehabilitation centers for some duration of time. ...
Breaking Medicine Technology: