The purpose of this study was to determine the overflow effect and cross training
effect of isometric quadriceps training that performed in specific angle of unilateral leg.
Ten healthy students with an average age of 24 years (24.1±1.3), were participated in
this study. Then 5 subjects in each group were chosen at random to train using only
right quadriceps muscle two time per day(group 2), five times a week and the other 5
subjects(group 1) were chosen to train one times per day, five times a week for 2
weeks at only 50degrees (contract 6 seconds, rest 10 seconds, 3 sets). Before and after
the training, isometric quadriceps muscle testing of the both leg was performed at three
different angles, 60, 50 and 40 degrees respectively by KIN-COM (isokinetic
dynamometer) in siting position. The data was analyzed with paired t-test to determine
significant difference between before and after training.
In this study, we have found that the isometric quadriceps muscle training on specific
angle of right side produced overflow effect in healthy subjects. However, increasing the
peak torque of specific angle(training angle) of trained limb did not have an effect on
increasing the peak torque of contralateral limb. These results demonstrate that the
cross training effect did not found in this study but a slight increase of peak torque of
the untrained limb would recognized the possibility of cross training effect.
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