Effect of Chronic Ankle Instability on Core Stabilization, Dynamic Balance and Agility
Condition: Ankle Sprains; Ankle Injuries; Chronic Ankle Instability
MeSH terms: Ankle Injuries
Study type: Observational

Summary: 
      Ankle sprains are the most common injury in basketball, especially involving repetitive
      maneuvers such as acceleration, deceleration, jumping, and landing. The incidence of ankle
      sprain is 40% in female basketball players and 75% in male basketball players. It is also
      known that chronic ankle instability (CAI) develops in 20-40% of cases. The effects of
      chronic ankle instability on core stabilization, dynamic balance and agility in basketball
      players have been investigated in the literature, and it has been stated that more studies
      are needed on the subject.

      The aim of this study is to examine the effects of chronic ankle instability on core
      stabilization, dynamic balance and agility in basketball players playing in the university
      team.

      The hypothesis of the study is that there is a difference between core stabilization, dynamic
      balance and agility values of basketball players playing in the university team with and
      without chronic ankle instability.
    

Detailed description: 
      Approximately 10% to 28% of all sports injuries are ankle sprains. Ankle sprains are the most
      common injury in basketball, especially involving repetitive maneuvers such as acceleration,
      deceleration, jumping, and landing. The incidence of ankle sprain is 40% in female basketball
      players and 75% in male basketball players. It is also known that chronic ankle instability
      (CAI) develops in 20-40% of cases. People with CAI have several types of deficits, including
      decreased ankle range of motion, decreased ankle arthrokinematic quality of movement,
      problems with postural control and strength, impaired proprioception and neuromuscular
      control, and altered gait patterns. These problems can cause loss of matches, increase in
      health expenditures and future injuries in athletes. Postural control disorders that play a
      role in the regulation of balance have been shown to be common in people with CAI and after
      acute lateral ankle sprain. Postural control requires somatosensory, visual and vestibular
      stimuli and appropriate motor response to generate the appropriate balance response. In
      individuals with CAI, the ankle joint and postural control mechanisms that cannot receive
      appropriate afferent stimulation and cannot reveal the correct efferent stimulation from the
      central nervous system are impaired.

      Agility, the ability to make rapid changes in the direction of movement, is widely regarded
      as an important criterion for success in basketball. Agility tests require rapid
      deceleration, change of direction, and reacceleration during movements. Such activities put
      athletes in a condition that can force the ankle complex into excessive inversion and plantar
      flexion, which often causes ankle sprain.

      The relationship between chronic ankle instability and athletic performance parameters has
      been investigated in previous studies. However, the relationship between chronic ankle
      instability and athletic performance parameters has not yet been fully explained, and it has
      been stated that more studies are needed on the subject.

      Core stability is the motor control and muscle capacity of the lumbopelvic complex. Studies
      have shown that weakness in the core musculature can predispose an athlete to injury,
      including ankle sprains. Subjects with a history of lower extremity injuries require more
      trunk muscle contractions to stabilize the body during dynamic tasks compared to healthy
      subjects. Therefore, core muscles are an important element to be evaluated in athletes with
      chronic ankle instability. Although the relationship between chronic ankle instability and
      the strength of the core muscles has been examined in the literature, the relationship
      between them has not been fully explained.

      In this study, the relationship between chronic ankle instability and core stabilization,
      dynamic balance and agility in Yeditepe University basketball players will be discussed and
      the results will be presented.

      The power analysis of the research was made using the G*Power 3.1 program. The power of the
      study was determined as 80%. In a similar study, the mean of the Y balance test in
      individuals with chronic ankle instability was reported as 86.61, standard deviation of 3.98,
      and standard deviation of 9.51 in individuals without chronic ankle instability. Based on
      these values, power analysis was made with the G*Power 3.1 program. As a result of the
      analysis made with 80% power, the number of participants in the experimental and control
      groups was determined as 10 for each group.

      SPSS (version 22.0) will be used in the data analysis of our research. Quantitative data to
      be obtained from the research will be shown as mean and standard deviation.
      Kolmogorov-Smirnov test will be used to test numerical variables for normality. According to
      the conformity of the obtained data to the normal distribution; If the data is normally
      distributed (parametric), Independent Sample t-test will be used to compare the two groups.
      If the data are not normally distributed, the Mann-Whitney U test will be used to compare the
      two groups. Qualitative data of the groups will be displayed with frequency and percentage
      values. The statistical significance level will be accepted as p<0.05.
    

Observational model: Case-Control
Time perspective: Cross-Sectional
Sampling method: Non-Probability Sample
Study population: 
        It is planned to include athletes aged 18-25, who play in university basketball teams, with
        and without chronic ankle instability in our study.

        It will include students between the ages of 18-25 who study at Yeditepe University and
        play in Yeditepe University basketball teams.
      
Keywords: chronic ankle instability; ankle instability; core stability; agility; dynamic balance; balance