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Table 1 LES and LMF muscle activity in each posture

From: Effects of arm and leg positions on lumbar multifidus muscle activity while on hands and knees or while standing

   SFHE-HK SAHA-HK SFHE-S SAHA-S P-value η2
LES %MVC (mean ± SD) 33.1 ± 12.5 38.3 ± 8.9 30.3 ± 8.2 41.1 ± 8.5 P = 0.120 0.258
95% CI 23.5 to 42.7 31.5 to 45.1 24.1 to 36.6 34.5 to 47.6
LMF %MVC (mean ± SD) 38.7 ± 11.0 53.1 ± 17.1a,b 34.8 ± 16.7 53.4 ± 13.1c,d P = 0.001** 0.510
95% CI 30.3 to 47.1 39.9 to 66.2 22.0 to 47.7 43.3 to 63.4
  1. a SAHA-HK exhibited significantly higher values than SFHE-HK (P = 0.027*, r = 0.616), b SAHA-HK exhibited significantly higher values than SFHE-S (P = 0.004**, r = 0.795), c SAHA-S exhibited significantly higher values than SFHE-HK (P = 0.024*, r = 0.757), d SAHA-S exhibited significantly higher values than SFHE-S (P = 0.003**, r = 0.882). *P < .05, **P < .01, with statistical significance. η2, r: effect size, MVC maximum voluntary contraction. CI confidence interval