Judokas with low back pain have lower flexibility of the hip-spine complex: A case-control study.

Study whether male adult judokas with and without low back pain (LBP) have different hip-spine flexibility. Cross-sectional. Judo training centres. Judokas with (n = 29) and without (n = 33) LBP. Range of motion (ROM) (passive and active rotations) of hips, lumbar spine (flexion-extension) and fingertip-to-floor distance (FTFD). The non-dominant hips of judokas with LBP had 6.8 ± 1.2° (ES:1.45, p < 0.001) lower passive and 8.0 ± 1.3° (ES:1.55, p < 0.001) lower active internal rotation. Dominant hips of judokas with LBP had 5.1 ± 1.6° (ES: 0.81, p = 0.002) lower active internal rotation and 8.8 ± 2.9° (ES:0.79, p = 0.003) lower active total rotation. The LBP group showed 8.0 ± 2.8° (ES: 0.73, p = 0.006) lower flexion and 6.0 ± 2.2° (ES: 0.69, p = 0.009) lower extension of the lumbar spine. The FTFD in the LBP group was 7.3 ± 2.6 cm (ES: 0.72, p = 0.007) lower. The multi-level regression analyses showed passive (OR 1.54, 95%CI 1.18-2.00, p = 0.001) and active (OR 1.47, 95%CI 1.16-1.87, p = 0.001) hip internal rotation of the non-dominant leg and lumbar spinal flexion (OR 1.11, 95%CI 1.03-1.20, p = 0.006) and extension (OR 1.16, 95%CI 1.01-1.33, p = 0.035) were related to LBP. Lower hip internal rotation of the non-dominant leg (passive and active) and lower lumbar flexibility are significantly related to LBP in male adult judokas.

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