Aim: This study aimed to compare the effects of linear periodization (LP) and undulating periodization (UP) of strength training on acceleration in skater children.Methods: Twenty-nine girls (9.67±1.29 years-old, 34.47±8.06kg,1.39±0.13m)were distributed into two groups: linear periodization group (LPG, n=14) and undulating periodization group (UPG, n=15).Six levels of progressive training were designed based on activities such as multi-jumps, plyometrics, sled towing, and facilitated exercises.The training lasted 16 weeks, with a 1-h session on three nonconsecutive days per week.The acceleration was recorded by digital videography following the major trochanter of the femur, at four moments and under two conditions: static (SS) and dynamic start (DS) in a rectilinear path.Statistical significance was set at 5%.Results: ANOVA indicated group*moment interaction in SS and DS for velocity (F 3,81 =7.883; p<0.001; pη²=0.226;F 3,81 =2.36; p=0.078; pη²=0.08-trend,respectively) and acceleration (F 3,81 =3.96; p=0.011; pη²=0.128;F 3,81 =2.92; p=0.039; pη²=0.098,respectively).Both groups increased velocity in SS and DS (UPG/SS: 1 st =4.07, 2 nd =9.75, 3 rd =8.91, 4 th =9.25m/s; LPG/SS: 1 st =4.27, 2 nd =7.13, 3 rd =7.61, 4 th =7.99m/s; UPG/DS: 1 st =8.30, 2 nd =8.73, 3 rd =8.12, 4 th =9.27m/s; LPG/DS: 1 st =8.20, 2 nd =8.31, 3 rd =7.90, 4 th =8.96m/s) and acceleration (UPG/ SS: 1 st =2.00, 2 nd =8.69, 3 rd =4.71, 4 th =5.02m/s 2 ; LPG/SS: 1 st =2.37, 2 nd =3.39, 3 rd =3.68, 4 th =4.12m/s 2 ; UPG/DS: 1 st =1.78, 2 nd =1.97, 3 rd =1.65, 4 th =2.46m/s 2 ; LPG/DS: 1 st =1.67, 2 nd =1.70, 3 rd =1.48, 4 th =1.93m/s 2 ).Conclusion: Both strength training periodization protocols were effective in developing acceleration and velocity in girl skaters over 16 weeks; however, UP was more efficient than LP for improving acceleration.