Date of Award
Master of Science
Human Performance and Health Education
Dr. Sangwoo Lee
Dr. Timothy Michael
Dr. Nicholas Hanson
Landing asymmetry, ground reaction force, vertical-jump, force production, take-off asymmetry
Masters Thesis-Open Access
Significant asymmetries can exist between the lower limbs’ force production during the take-off phase of bilateral jumping exercises. Some studies have indicated that similar asymmetries can exist during the landing phase as well. It has not been demonstrated if the magnitude and/or direction of this imbalance is alike during the landing (L) and take-off (TO) phase of a jumping exercises. The main purpose of this study was to determine if there is a difference in the asymmetry that occurs during the L and TO phases. In order to quantify the degree and describe the direction (left. vs. right) of the occurring asymmetry, the vertical ground reaction force (vGRF) produced by each leg was measured during execution of vertical-jump (VJ), drop-jump (DJ), and drop-landing (DL) exercises. 11 recreationally trained individuals completed 3 VJ, DJ, and DL trials while two force plates recorded kinetic data. A repeated measures ANOVA was used to compare the asymmetry levels measured during all phases of the VJ, DJ, and DL. A significant difference was found between the levels of asymmetry displayed during the L and TO phases (p<.05). These findings suggest that there is greater asymmetry in the vGRF each leg experiences during landing than during take-off.
Cone, Simon, "Lower Limb Force Asymmetries during Landing and Jumping Exercises" (2020). Masters Theses. 5141.