Morphological variations of the lumbar spine in different athletic populations

Thesis Abstract

Lumbar spine morphology exhibits notable variations across individuals, influenced by genetic, functional, and environmental factors; however, limited research exists regarding how these variations manifest among different athletic populations and their potential implications for performance and injury risk. This study aims to investigate the morphological differences of the lumbar spine in diverse athletic cohorts, with specific objectives to identify variations in vertebral shape, size, and alignment; determine associations between these variations and types of athletic activity; and evaluate the potential implications for athletic performance and injury susceptibility. Using an analytical cross-sectional research design underpinned by the saliency theory of musculoskeletal adaptation, the study examines four distinct athletic groups gymnasts, long-distance runners, weightlifters, and swimmers, with a total sample of 200 athletes (50 per group), selected through stratified random sampling from national sports associations. Data collection involves high-resolution magnetic resonance imaging (MRI) scans, analyzed quantitatively for vertebral dimensions, curvature angles, and morphological classifications utilizing ImageJ software, complemented by demographic and training history questionnaires. Validity of imaging procedures is ensured through calibration against standard phantoms, and reliability is assessed via intra- and inter-rater consistency testing with intraclass correlation coefficients (ICCs). Data analysis employs descriptive statistics to summarize morphological features, one-way ANOVA to compare groups, and post hoc tests to identify specific differences, while multiple regression analyses explore relationships between morphological variables and athletic parameters such as training duration and intensity. It is anticipated that the study will reveal significant variations in lumbar vertebral shape, size, and alignment among different athletic populations, with certain morphological features associated with specific sports that demand high spinal flexibility, stability, or load-bearing. For example, gymnasts may exhibit increased lumbar lordosis and vertebral body dimensions, while weightlifters might demonstrate vertebral stacking anomalies related to compressive stress. These findings are expected to contribute novel insights into sport-specific skeletal adaptations and their potential influence on injury predisposition, thus filling a critical gap in sports medicine and anthropometric research. The study’s contribution to knowledge lies in establishing a comprehensive morphological profile of the lumbar spine associated with distinct athletic activities, facilitating the development of customized training and injury prevention strategies. The main conclusions are that morphological variations are significantly influenced by athletic modality, with clinical relevance for pre-participation screening and tailored intervention programs. Recommendations include integrating spinal morphological assessments into athlete health monitoring protocols and promoting further longitudinal studies to examine causal relationships between spinal morphology, training regimens, and injury outcomes. Overall, the research emphasizes the importance of athlete-specific morphological considerations in optimizing performance and minimizing injury risk, advancing the understanding of musculoskeletal adaptations within sports science.