# Relationship between Physical Factors and Change of Direction Speed in Team Sports
## 3 Results and Discussion  
### Relationship between CODS and Linear Sprint Speed  
The vast majority of studies confirmed the relationship between linear sprint speed and change of direction speed. However, it depended on the distance of the sprint and the type of CODS test. Significant positive correlations were found between the best trial in 505 Agility test and 10 m sprint test in female soccer players (\(r\) = 0.39 * and \(r\) = 0.55 *, respectively) [20]. The same results were observed between the best trial with the change of direction to the left and right side in female netball players (\(r\) = 0.58 * and \(r\) = 0.53 *, respectively) [17]. The study of [PERSON] et al. [13] confirmed it only with the single directional change by their non-dominant leg in male rugby players (\(r\) = \(-\)0.53 *). It is important to mention that slightly more than half of these players were faster at this test using only their non-dominant leg. The 10 m sprint also showed a significant relationship with the other, shorter CODS test (3.5 m forward running and then cutting to the left or right side) in male Australian rules football players (\(r\) = 0.50 *) [18] and with the Zig-Zag agility test (5 m of multiple changes of direction) in teenaged soccer players (\(r\) = 0.57 *) [21]. In addition, the CODS tests correlated with acceleration speed for longer distances (from 18.3 m to 40 m) in handball and soccer players (\(r\) = 0.25 * to 0.84 **) [16; 21; 22; 23; 24] and with maximal sprint speed in male rugby players (\(r\) = \(-\)0.52 ** and \(r\) = \(-\)0.63 **, respectively) [13]. However, reaching the maximal sprint speed is common in rugby, whereas it is not very possible in other team sports. For example, this relationship was not confirmed in female soccer players [24]. It may be due the fact that running in the soccer is often associated with working with the ball by foot, which distinguishes it from rugby.  
The 5 m linear speed showed only a moderate (from 0.34 * to 0.45 *) or nonsignificant relationship with the Zig-Zag and 505 Agility tests [17; 22]. The 5 m sprint correlated only with the short directional changes, while higher distance in linear speed results showed a stronger correlation with the many type of CODS tests. However, all of the players participated in team sports. Therefore, it is also applicable to players of individual sports (e.g., combat sports, tennis, squash, or table tennis).  
Furthermore, the type of CODS test could potentially affect the relationship between CODS and linear sprint speed. For example, the 30 m COD\({}^{2}\), which included 10 m forward-5 m-backward-10 m-forward running correlated with the sprint for 10 and 30 m (\(r\) = 0.56 *** and \(r\) = 0.60 ***), while the 30 m COD\({}^{1}\) (only forward running with a change of direction at an angle of 60\({}^{\circ}\) every 5 m) did not correlate with both of the linear sprints [16]. The possible reason is that the execution of 30 m COD\({}^{2}\) test, including a longer running distance without the need to decelerate every 5 m, as in the 30 m COD\({}^{1}\) test, had a structure closer to the execution of the 10 m and 30 m linear sprint tests. We assumed that the strength of correlation also depended on the similarity (or some degree of compliance) between the CODS test and the specific distance of the linear sprint. Surprisingly, some studies found a significant relationship between the CODS with lateral running and 10 m (15 m) sprint in team sport players (\(r\) = 0.39 * to 0.65 *), although the method of performing the movement in these two tests is considerably different [20; 25].