A Prospective Study on Sports Injuries in Youth Baseball Players

A Prospective Study on Sports Injuries in Youth Baseball Players - A Prospective Study on Sports Injuries in Youth Baseball Players

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000060081

Enrollment

8000

Registered

2025-12-15

Start date

2013-02-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Baseball Elbow (Osteochondritis Dissecans(OCD)of the Humeral Capitellum, Avulsion Fracture of the Medial Epicondyle) Baseball Shoulder(Epiphysiolysis of the Proximal Humerus (Little League Shoulder), Rotator Cuff Injury, Impingement Syndrome) Osgood-Schlatter Disease Lumbar Spondylolysis

Interventions

Intervention Group: This group consisted of players confirmed to have growth-related sports injuries through the following diagnostic process: A primary screening was conducted using medical history,

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Participants from whom written informed consent for participation in this study was obtained. 2. Residents of the Kanto region. 3. Students from the first grade of elementary school to the third year of high school. 4. Baseball players.

Exclusion criteria

Exclusion criteria: 1.None

Design outcomes

Primary

Measure	Time frame
Statistical Analysis Univariate analysis will be performed to compare factors associated with sports trauma between the injury-onset and non-onset groups. Additionally, multivariate regression analysis will be conducted to identify risk factors for the onset of sports injuries. Assessment Methods Questionnaire Survey: Data collection will include age, position, practice volume (days/week, games/year), conditioning habits (warm-up, cool-down, icing), current pain (shoulder, elbow, lower back, etc.), and history of medical visits. Pitchers will specifically report their pitch counts (daily/weekly) and self-evaluate their performance (0-10 scale). Mental health and physical condition, including COVID-19-related factors, will also be assessed. Physical Examination: The shoulder, elbow, knee, and lumbar regions will be assessed for pain, tenderness, range of motion (ROM), muscle strength, and via provocation tests. Ultrasound Examination: Screening will be conducted for: Shoulder: Humeral retroversion angle and proximal humeral physeal injuries. Elbow: Medial epicondyle physeal injuries and osteochondritis dissecans (OCD) of the humeral capitellum. Knee: Tibial tuberosity physeal injuries and Osgood-Schlatter disease. X-ray Examination: X-ray examinations using a portable unit will be performed on players presenting with pain in the shoulder, elbow, knee, or lumbar spine, or those suspected of having baseball shoulder, baseball elbow, Osgood-Schlatter disease, or lumbar spondylolysis based on ultrasound or physical findings	—

Measure

Time frame

Statistical Analysis Univariate analysis will be performed to compare factors associated with sports trauma between the injury-onset and non-onset groups. Additionally, multivariate regression analysis will be conducted to identify risk factors for the onset of sports injuries. Assessment Methods Questionnaire Survey: Data collection will include age, position, practice volume (days/week, games/year), conditioning habits (warm-up, cool-down, icing), current pain (shoulder, elbow, lower back, etc.), and history of medical visits. Pitchers will specifically report their pitch counts (daily/weekly) and self-evaluate their performance (0-10 scale). Mental health and physical condition, including COVID-19-related factors, will also be assessed. Physical Examination: The shoulder, elbow, knee, and lumbar regions will be assessed for pain, tenderness, range of motion (ROM), muscle strength, and via provocation tests. Ultrasound Examination: Screening will be conducted for: Shoulder: Humeral retroversion angle and proximal humeral physeal injuries. Elbow: Medial epicondyle physeal injuries and osteochondritis dissecans (OCD) of the humeral capitellum. Knee: Tibial tuberosity physeal injuries and Osgood-Schlatter disease. X-ray Examination: X-ray examinations using a portable unit will be performed on players presenting with pain in the shoulder, elbow, knee, or lumbar spine, or those suspected of having baseball shoulder, baseball elbow, Osgood-Schlatter disease, or lumbar spondylolysis based on ultrasound or physical findings

—

Secondary

Measure	Time frame
To evaluate the effectiveness of stretching instruction on improving the range of motion (ROM) of the shoulder, elbow, trunk, hip, knee, and ankle.	—

Countries

Japan,Asia(except Japan)

Contacts

Public ContactTsuyoshi Tajika

Gunma University Graduate School of Health Sciences Department of Applied Rehabilitation

tajika@gunma-u.ac.jp027-220-8269

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026