Risk factors for lower back injuries in sumo wrestlers are heavier weight and larger body mass index (BMI). N2 - Background: Sumo wrestling is a traditional sport in Japan and becoming popular worldwide. JF - Orthopaedic journal of sports medicine T1 - Radiological Findings of the Lumbar Spine in High School and Collegiate Sumo Wrestlers. Spondylolysis in the lumbar body was found in 25 wrestlers (12.7%) 19 of the 91 symptomatic wrestlers (20.9%) had spondylolysis, compared with 6 of the 106 (5.7%) asymptomatic wrestlers (P =. Five wrestlers of the total 197 athletes (2.5%) had disc space narrowing in the lumbar body, with 3 of the 5 cases of disc space narrowing (60.0%) found in the upper lumbar spine.

Of the total, 48 wrestlers (24.4%) had deformities (Schmorl nodules) in the lumbar body, and 23 of 50 (46.0%) and 10 of 16 (62.5%) deformities were found in the upper lumbar spine of collegiate and high school wrestlers, respectively. Ten wrestlers (5.1%) had osteophyte formations in the lumbar body 8 of the 11 osteophytes (72.7%) appeared in the upper lumbar spine. There were 91 participants in the symptomatic group (46.2%) and 106 (53.8%) in the asymptomatic group. The wrestlers' mean height, weight, BMI, and duration in the sport were 174.0 ± 6.7 cm, 107.1 ± 22.4 kg, 35.2 ± 6.4, and 8.0 ± 3.2 years, respectively.

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