The Effect of Hip and Ankle Joint Abductor/Adductors Fatigue on Dynamic Balance of Soccer Players

Document Type: Research Paper


1 PhD Student, University of Tehran

2 Tehran Kharazmi University


The aim of this study was to examine the effect of hip and ankle joint
abductor/adductors fatigue on the dynamic balance of soccer players. 20
male physical education students (Mean±SD, age: 20.24±0.73 yrs, height:
170.27±4.28 cm, weight: 67.38±7.24 kg, and BMI: 23.22±2.02 kg/m²) who
participated three times per week in university soccer team program,
without any lower extremity injury voluntarily participated in this study. In
order to estimate the participants' dynamic balance, Star Excursion Balance
Test (SEBT) in eight directions was applied after a short warm-up.
Dynamometer Isokinetic Biodex was used to execute fatigue in hip and
ankle joint abductor/adductor muscles. Each subject participated in two
muscle fatigue sessions. In each session, the fatigue program was randomly
assigned to one of the muscle groups of hip abductor/adductor and ankle
joint evertor/inventor in repeated contractions until reaching 50% of
primary maximum torque with the interval of 72 hours in the same situation
as far as possible. Afterwards, SEBT posttest was conducted. Descriptive
statistics, dependent t test and variance analysis (with repeated measures)
was used for statistical analysis at P<0.05. The isokinetic fatigue of hip and
ankle joint abductor/adductors significantly decreased the accessible
distance in SEBT test. Furthermore, fatigue program in the hip
abductor/adductors decreased the accessible distance more than the ankle
joint evertor/inventors. Due to the results, the fatigue of hip
abductor/adductors was more effective in the dynamic balance of soccer
players than ankle joint evertor/inventors.