change of direction


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The authors demonstrated the percentage contribution of 15 anthropometric and muscle variables to the performance of two sprint types with change of direction (t-test and 5-m shuttle run sprint).
CMJ, SJ), sprints with change of direction (ZZT, Acyclic Sprint), and with no change of direction (S10m, S20m) in professional soccer players.
With respect to the 1st day, sprint tests were performed at 10m (S10m) and 20m (S20m) with change of direction (shuttle running) at 20m, thus totaling 40m (acyclic sprint).
The Zig Zag Test consisted of performing a sprint with a change of direction at 20 m distance.
The ICC found in the variables of vertical jumps and sprints with and without change of direction showed high reliability between test attempts (r [greater than or equal to] 0.
The current study investigated the relationship between vertical jumps and sprints with and without change of direction among Brazilian professional soccer players.
In the change of direction during shuttle run cutting, subjects demonstrated a forward-inclined trunk during the first 50% of the stance phase and a left-inclined trunk during the first 40% of the stance phase (Figure 2).
These data suggest that trunk stability during a change of direction is an important factor in the change-of-direction performance.
In change-of-direction maneuvers, the preparation that goes into the stance phase may be considered as a factor affects the trunk inclination angle or angular displacement during a change of direction.
Therefore, coaches in field sports should check the body posture and trunk movement of players when they require a change of direction or when they participate in sport-specific change-of-direction training, as improvements in the change-of-direction technique may lead to players being able to make these changes more rapidly.
In the future, it is our intention to continue to collect kinematics data pertaining to trunk movement during a change of direction.
This study provides important data pertaining to trunk kinematics during change of direction and suggests a change-of-direction technique that is related to the change-of-direction performance.