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Lumbar intervertebral disk degeneration in elite competitive swimmers: a case control study
Koji Kaneoka1, Ken Shimizu, Mika Hangai
1Department of Orthopaedic Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan. seikei@md.tsukuba.ac.jp
Elite swimmers show higher rates of lumbar disc degeneration, particularly at the L5-S1 segment, compared to recreational swimmers. This suggests excessive swimming may accelerate spinal disc aging.
Area of Science:
- Orthopaedic sports medicine
- Spinal imaging and degeneration
- Biomechanics of swimming
Background:
- Competitive swimmers frequently experience shoulder, low back, and knee pain.
- Lumbar disc herniation has impacted national swim team performance.
- No prior research existed on lumbar disc degeneration in elite swimmers.
Purpose of the Study:
- To investigate if excessive competitive swimming accelerates lumbar disc degeneration.
- To compare disc degeneration prevalence between elite and recreational swimmers.
Main Methods:
- A case-control study design was employed (Level of evidence, 3).
- Magnetic resonance imaging (MRI) evaluated 56 elite swimmers and 38 recreational swimmers.
- Prevalence of disc degeneration, affected disc levels, and correlations with symptoms and swimming styles were analyzed.
Main Results:
- Elite swimmers exhibited significantly higher disc degeneration rates (68%) than controls (29%) (P = .0002).
- The L5-S1 intervertebral segment showed significantly more frequent degeneration in elite swimmers (P = .026).
- No significant links were found between low back pain, swimming strokes, and disc degeneration.
Conclusions:
- Excessive competitive swimming may exacerbate lumbar intervertebral disc degeneration.
- The L5-S1 intervertebral segment appears particularly vulnerable in elite swimmers.
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