Association between Body Composition Characteristics and Chronic Low Back Pain in High-School Baseball Players: A
Hidetoshi Nakao1, Taro Hamada2, Rinpei Shimizu2
1Department of Physical Therapy, Faculty of Social Work Studies Josai International University.
International Journal of Sports Physical Therapy
|January 9, 2026
Summary
High body fat and pain intensity in young baseball players predict chronic low back pain (CLBP). Monitoring body composition and pain can help prevent CLBP and improve athletic health.
Area of Science:
- Sports Medicine
- Orthopedics
- Adolescent Health
Background:
- Chronic low back pain (CLBP) is prevalent in adolescent athletes, especially baseball players.
- The link between body composition and CLBP in this population is not well understood.
Purpose of the Study:
- To examine the association between body composition metrics and the presence of CLBP in high school baseball players.
Main Methods:
- A retrospective cohort study involving male high school baseball players.
- Body composition was assessed using bioelectrical impedance analysis.
- Logistic regression identified factors associated with CLBP.
Main Results:
- Players with CLBP had significantly higher percentage body fat (PBF), body fat mass (BFM), and trunk fat mass.
- First-year pain scores (NRS) and PBF were significant predictors of CLBP.
Conclusions:
- Elevated PBF and pain intensity in early high school are linked to CLBP development in baseball players.
- Monitoring body composition and early pain intervention may prevent CLBP and enhance long-term athletic outcomes.
