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Table 1 Test-retest reliability of the muscle onset times

From: Electromyographic analysis of selected shoulder muscles during a rugby football tackle

  Pectoralis Major
(Msec)
Biceps Brachii
(Msec)
Latissimus Dorsi
(Msec)
Serratus Anterior
(Msec)
Infraspinatus
(Msec)
Mean differenc 1.7 1.3 1.3 1.9 2.0
Standard Deviation (SD) 1 1 0.6 1.1 1.1
Standard error of measurement (SEM) 0.33 0.39 0.22 0.35 0.4
Confidence interval (95%) 1.06–2.34 0.87–2.06 0.87–1.73 1.21–2.59 1.22–2.78
ICC3, k 0.89* 0.85* 0.87* 0.9* 0.87*
  1. * Statistical Significant (p < 0.01)
  2. 95% CI = 1.96 × SEM
  3. SEM = SD × √1-ICC [18].