Effect of Fatigue on Some Indicators of Ground Reaction Force in Young Active Men ‎During Drop-Landing task

Drop-landing is one of the tasks performed in many sports skills. Lower limb injuries have the highest prevalence in sports where jump-landing is repeated frequently. In this condition, fatigue is one of the components that can be influential from biomechanical and pathomechanical points of view on different parameters of landing motion. Therefore, the purpose of this study was to investigate the effect of fatigue on some indicators of ground reaction force in healthy young active men during drop-landing task from a platform.

In this semi-experimental study, 20 healthy young active males were participated. Wingate test was used for fatigue protocol. The ground reaction force components information was collected during drop-landing from a 40 cm platform before and after fatigue. To collect data, a Kistler force plate was used, and the parameters of peak force, time to reach maximum peak force, loading velocity and time to reach stability were calculated. These data were analyzed using a series of Paired-sample T tests at a significant level of 0.05.

According to the findings of this study, there was no significant difference between the pre and post fatigue states for peak force, peak time, and loading rates in vertical direction. However, the time to stabilization in post-fatigue mode was significantly higher than that before fatigue.

According to the findings of this study, it seems that after fatigue healthy young men reach a stable level later compared to the state of pre-fatigue.