Throwing ball velocity is one of the indicators that determine softball
performance. However, most of the training on throwing only focused on the
major muscles and they neglected the assisted muscles such as hand grip and
trunk rotation muscles that also crucial in improving the throwing
performance. Therefore, the purpose of this study is to identify the effect of
hand grip strength training, and trunk rotation strength training towards the
throwing ball velocity among female collegiate softball players. 54 female
collegiate softball players were equally divided into three training groups
which are hand grip strength training group (HG), trunk rotation strength
training group (TR), and basic strength training group (CG). All the groups
performed the same basic strength training program with different additional
strength training according to the group`s treatment. Each group trained 3
days per week for 6 weeks. Throwing ball velocity was assessed before
(pretest) and after (posttest) the 6 weeks training program via one-way
between groups analysis of variance (ANOVA) to compare the mean gained
score in throwing ball velocity between each group. The result shows that all
group significantly differences in throwing ball velocity (p