The effect of an eccentric exercise program on one limb in balance of both lower limbs
Abstract
Exhausting or unaccustomed eccentric exercise causes muscle damage and reduces functionality and performance of the exercised limb. The purpose of the present study was to estimate the effect of an acute eccentric exercise program on one lower limb in balance of both lower limbs. Thirty healthy male students of Physical Education and Sport Sciences University, aged 20-22, voluntarily performed 300 eccentric contractions of the extensor muscles of the knee joint of the right, dominant lower limb at an angular velocity of 45ο/sec with an isokinetic dynamometer. On the first day, before and immediately after the eccentric contraction protocol and every other day of the remaining 9 days, balance was assessed on “Biodex Stability System” where the degree of deviation at the horizontal level was recorded to determine whether and if there was an alteration of balance of both lower limbs on a day to day basis. For the statistical analysis of the results, “t-test” for dependent samples and “MANOVA repeated measures” variance analysis were used. Results showed that there was a statistically significant difference in balance between the two extremities immediately after intervention (F(1,58) = 14,10, p <.05). However, there was no statistical difference in balance among the exercised and the control lower limb on the second evaluation day (F(1,58)= 1,87, p > .05). Furthermore, there was a gradual, statistically significant improvement in balance of the exercised lower limb by the last day (F(1,58) = 23,73, p < .001), whereas there were no statistically significant differences between the two lower limbs (F( 1,58) = 0,18, p > .05). In conclusion, eccentric exercise reduced balance of the exercised lower limb for 24 hours. In addition, daily performance of the balance assessment led to the familiarization of individuals and the improvement of balance capacity on both lower limbs by the last day.References
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