Table 1. Reliability of test measurements (n = 20). ICC (95% CI) CV (%) SV 0.970 (0.946-0.986) 4.0 MVC IR90º 0.897 (0.618 – 0.972) 11.1 MVC ER90º 0.990 (0.958 – 0.997) 6.0 MVC ADD 0.981 (0.937 – 0.994) 6.0 MVC ABD 0.923 (0.747 – 0.976) 16.6 MVC IMTP 0.982 (0.950 – 0.993) 6.7 PRFD IR90º 0.933 (0.666 – 0.987) 19.3 PRFD ER90º 0.953 (0.728 – 0.992) 15.3 PRFD ADD 0.969 (0.884 – 0.992) 19.1 PRFD ABD 0.937 (0.720 – 0.986) 20.8 PRFD IMTP 0.844 (0.307 – 0.965) 16.4 IR 90º 50 ms 0.932 (0.764 – 0.980) 19.2 IR90º 100 ms 0.965 (0.885 – 0.989) 12.1 IR90º 150 ms 0.973 (0.911 – 0.992) 13.6 IR90º 200 ms 0.920 (0.646 – 0.982) 14.9 ER 90º 50 ms 0.904 (0.615 – 0.976) 18.3 ER90º 100 ms 0.957 (0.849 – 0.987) 14.1 ER90º 150 ms 0.907 (0.677 – 0.973) 12.4 ER90º 200 ms 0.872 (0.486 – 0.968) 11.8 ADD 50 ms 0.960 (0.862 – 0.989) 14.4 ADD 100 ms 0.987 (0.959 – 0.996) 7.8 ADD 150 ms 0.860 (0.514 – 0.960) 14.0 ADD 200 ms 0.910 (0.689 – 0.974) 16.8 ABD 50 ms 0.984 (0.941 – 0.996) 11.3 ABD 100 ms 0.959 (0.848 – 0.989) 13.3 ABD 150 ms 0.890 (0.558 – 0.973) 14.8 ABD 200 ms 0.880 (0.399 – 0.976) 16.3 IMTP 50 ms 0.910 (0.622 – 0.980) 7.2 IMTP 100 ms 0.915 (0.623 – 0.981) 5.3 IMTP 150 ms 0.823 (0.286 – 0.956) 14.7 IMTP 200 ms 0.879 (0.548 – 0.967) 9.1 CV = coefficient of variation; ICC = intraclass correlation coefficient; SV = serve velocity; MVC = maximal voluntary contraction; PRFD = peak rate of force development; IR = shoulder internal rotation; ER = shoulder external rotation; ADD = horizontal shoulder adduction; ABD = horizontal shoulder abduction; IMTP = isometric mid-thigh pull.