2019 Graduate Student Showcase

Title of Submission

Vertical Stiffness During Landing: Predicting Fatigue in Female Soccer Players Through Ground Reaction Forces

Degree Program

Kinesiology, MS

Major Advisor Name

Tyler Brown

Type of Submission

Scholarly Poster


Athletes may increase leg stiffness to safely land when fatigued. Thirty-one females had vertical leg stiffness quantified during five 30cm drop landings immediately prior to and following a competitive soccer season. During each landing, vertical stiffness was calculated as maximal vertical ground reaction force multiplied by the inverse of center of mass vertical displacement, and submitted to a RM ANOVA to test the main effect and interaction between time (pre vs. post) and fatigue (starter vs. non-starter). Vertical stiffness was not larger with the cumulative fatigue of a soccer season (p=0.129), or for athletes playing greater minutes (p=0.392).

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