Table 6. Mean values and standard deviations of IMTP variables by testing day and maturity groups. Category Variable Day1 Day2 Day3 All PF (N) 1722.05 ± 716.09 1891.27 ± 706.65 1856.87 ± 730.29 RFD50 (N·s-1) 1952.65 ± 2171.87 2455.04 ± 2039.23 2714.47 ± 2162.03 RFD100 (N·s-1) 2369.35 ± 2199.00 2916.46 ± 2203.27 2973.49 ± 1967.10 RFD150 (N·s-1) 2505.61 ± 1964.02 3003.26 ± 1957.61 3110.82 ± 1806.73 RFD200 (N·s-1) 2547.69 ± 1670.48 3130.29 ± 1785.77 3300.87 ± 1683.29 RFD250 (N·s-1) 2551.82 ± 1441.29 3075.91 ± 1551.79 3130.97 ± 1469.38 Pre PF (N) 978.43 ± 200.44 1101.94 ± 231.03 1038.02 ± 197.99 RFD50 (N·s-1) 1024.89 ± 662.53 1410.31 ± 1239.56 1514.48 ± 956.09 RFD100 (N·s-1) 1241.23 ± 768.17 1515.79 ± 1030.90 1560.04 ± 762.92 RFD150 (N·s-1) 1355.36 ± 735.28 1545.13 ± 812.75 1590.86 ± 658.71 RFD200 (N·s-1) 1374.60 ± 606.53 1662.13 ± 691.62 1656.89 ± 614.64 RFD250 (N·s-1) 1352.29 ± 535.85 1682.05 ± 549.90 1602.76 ± 510.02 Circa PF (N) 1775.81 ± 404.68 1911.92 ± 481.18 1861.28 ± 462.29 RFD50 (N·s-1) 1580.37 ± 1186.57 2523.49 ± 1630.46 3233.71 ± 2380.53 RFD100 (N·s-1) 2085.45 ± 1268.03 2897.83 ± 1449.03 3157.64 ± 1765.11 RFD150 (N·s-1) 2208.39 ± 965.68 2969.27 ± 1264.78 3193.67 ± 1508.07 RFD200 (N·s-1) 2280.40 ± 906.55 3121.29 ± 1256.59 3401.81 ± 1191.08 RFD250 (N·s-1) 2416.48 ± 874.38 3010.14 ± 979.33 3178.61 ± 915.15 Post PF (N) 2527.32 ± 464.63 2608.65 ± 383.50 2619.30 ± 404.67 RFD50 (N·s-1) 3525.91 ± 3242.72 3353.75 ± 2602.29 3222.86 ± 2289.39 RFD100 (N·s-1) 4063.96 ± 3109.99 4257.76 ± 2882.63 4079.93 ± 2192.20 RFD150 (N·s-1) 4243.49 ± 2634.91 4417.60 ± 2377.48 4437.40 ± 1793.00 RFD200 (N·s-1) 4273.69 ± 1880.36 4523.20 ± 1952.57 4722.24 ± 1508.45 RFD250 (N·s-1) 4138.20 ± 1289.05 4469.03 ± 1558.93 4507.10 ± 1196.04 Data are presented as mean ± SD. PF = peak force; RFD50-250 = rate of force development at time intervals of 0-50, 0-100, 0-150, 0-200, and 0-250 ms; SD = standard deviation; Pre = pre-PHV; Circa = circa-PHV; Post = post-PHV; PHV = peak height velocity. Supplementary Table 2. Within-session reliability for PF and RFD across maturity groups