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Table 1 Baseline and follow-up characteristics of the subjects (n = 26), mean (± SD)

From: Cross-sectional area of the paraspinal muscles and its association with muscle strength among fighter pilots: a 5-year follow-up

  Baseline Follow-up
Age (yrs.) 20.6 ± 0.6 25.8 (0.7)
Body mass (kg)a 76.8 ± 5.7 78.5 (5.6)*
Leg Extension (kg) 221.0 ± 37.9 N/A
Trunk Flexion (kg) 16.9 ± 3.4 N/A
Trunk Extension (kg) 17.4 ± 3.6 N/A
12-min running test (m) 2999 ± 228 N/A
LBP (no. subjects) 0 8
  1. LBP low back pain experienced; aANOVA for repeated measures, (Wilks’ Lambda) was used to obtain P values; *p < 0.05