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Effect of Eccentric Exercises of Adductor Muscles of Hip on Strength and Performance of Lower Limbs among Male Taekwondo Players Suffering From Lower Limb Injuries

Authors: SoleimanZare, Amir Letafatkar and MaliheHadadnezhad

Int J Med Res Health Sci.462-470 | pdf PDF Full Text

Groin strain is a prevalent sports related injury. These types of muscle strain can occur as a result of severe
physical activity in people who lack adequate readiness. There are several muscles in hip and pelvis area. These
muscles are responsible for movements of the pelvis joint in different motor plates. Some times as a result of an
impact or severe physical activity, these muscles are over stretched and muscle strain phenomenon occurs. Those
pelvis muscles which are more than others prone to straining are the adductor muscles of hip. The present study is
aimed at investigation of effects of eccentric exercises of hip adductor muscles on lower limbs strength and
performance among male taekwondo players suffering from lower limb injuries. The population of this study
includes the entire male Taekwondo players of Tehran during 2015. Among the target population, a number of 30
individuals were selected as the sample of the study through a purposive sampling method. Afterwards, using a
random assignment method, sample was divided into two groups of control and experimental. Conditions for
participating in the study included having at least a two year experience of playing Taekwondo for three times a
week in addition to being of 16-20 years age range. Prior to performance of the intervening program (hip adductor
muscles strengthening program), subjects passed the eccentric and concentric hip adductor muscles test using a
dynamometer and Isokinetic. They also passed the lower limb movement performance test by taking part in vertical
jump test, one-foot single jump distance, one-foot triple jumps distance, stairway leap running time, sweep running
time and one foot squatting test. Intervention included performance of eccentric exercises using a strap for
strengthening hip adductor muscles for 8 weeks. 48 hours after execution of intervention program, the subjects have
taken lower limbs strength and performance tests as they had taken their pre-test. Descriptive statistics have been
used for describing and organizing data obtained from posttest and pretest. In term of inferential statistics, the Covariance
analysis was applied. In case of significance of average differences in Covariance test, the LSD post hoc
test would be applied. It is noteworthy to mention that the entire statistical operations were performed using the
SPSS software v.23. Findings of the study have shown that eight weeks of eccentric exercises of hip adductor
muscles lead to improvement of concentric and eccentric strength of hip muscles as well as improvement of
movement performance of lower limbs among male Taekwondo players suffering from groin strain. As a result,
performing eccentric exercises is recommended for people suffering from groin injuries.

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