Twelve weeks of balance training allowed the BAL
group to significantly improve their performance
(p 0.01, Figs. 1a, 2a) on all of balance and vertical jump
tests, while 12 weeks of strength training with leg press
and leg extension machines resulted in a significant
improvement (p 0.05, Fig. 1b) for the ISO group only in
the left leg balance test. Both the BAL and ISO groups
were randomly selected at the beginning of the regular
season; therefore, the players had already completed the
pre-season training with their head coach. This scenario
ensured that all of the participants started the specific
training protocols of the study in equal physical and athletic conditions.