Running Kinetic Asymmetry Indices Are Associated with Concentric but Not Eccentric Jump Asymmetry Indices
Abstract
Decreases in right versus left limb asymmetry of kinetic characteristics of a countermovement jump (CMJ) positively influence running velocity and injury prevention. The relationship between CMJ kinetic asymmetry to kinetic asymmetry during a distance run is less known. The purpose of this study was to determine the association between kinetic asymmetries for both the eccentric (loading) and concentric (propulsion) phases of a CMJ and kinetic asymmetries during a treadmill run. Twenty-two university cross-country runners (age, 20.0±1.8 yrs; height, 1.73±0.09 m; mass, 61.7±8.8 kg) completed a 6-minute run on an instrumented treadmill that collected mean vertical ground reaction forces (vGRF) for both limbs. Runners then performed 3 maximal CMJs on dual force plates to derive kinetics for both limbs. Kinetic asymmetries between limbs were calculated as [(|left-right|)/(left + right) * 100] and expressed as a percent (%). CMJ kinetics included eccentric impulse (ECC-IMP), concentric impulse (CON-IMP), eccentric mean force (ECC-MEAN-FORCE) and concentric mean force (CON-MEANFORCE). Pearson Product Correlation Coefficients showed mean vGRF asymmetry (1.2±0.8%) from the run was significantly positively associated with CON-IMP (5.6±4.6%), r=0.477, p=0.037 and CONMEAN-FORCE (5.6±4.6%), r=0.477, p=0.037 asymmetry from the CMJ. Mean vGRF asymmetry from the run was not associated with CMJ ECC-IMP (9.6±7.0%) r=-0.29, p=0.899 or ECC-MEAN-FORCE (7.7±6.0%), r=0.198, p=0.378 asymmetry. ECC asymmetries were also larger than CON and running asymmetries. Measuring CMJ propulsion phase forces throughout a runner’s competitive season or rehabilitation program may provide insight into monitoring kinetic asymmetry during an actual run. CMJ loading phase asymmetries do not appear related to running asymmetries.
Faculty Sponsors
Dr. Monique Mokha
Project Type
Event
Location
Alvin Sherman Library
Start Date
4-3-2024 12:30 PM
End Date
4-4-2024 1:30 PM
Running Kinetic Asymmetry Indices Are Associated with Concentric but Not Eccentric Jump Asymmetry Indices
Alvin Sherman Library
Decreases in right versus left limb asymmetry of kinetic characteristics of a countermovement jump (CMJ) positively influence running velocity and injury prevention. The relationship between CMJ kinetic asymmetry to kinetic asymmetry during a distance run is less known. The purpose of this study was to determine the association between kinetic asymmetries for both the eccentric (loading) and concentric (propulsion) phases of a CMJ and kinetic asymmetries during a treadmill run. Twenty-two university cross-country runners (age, 20.0±1.8 yrs; height, 1.73±0.09 m; mass, 61.7±8.8 kg) completed a 6-minute run on an instrumented treadmill that collected mean vertical ground reaction forces (vGRF) for both limbs. Runners then performed 3 maximal CMJs on dual force plates to derive kinetics for both limbs. Kinetic asymmetries between limbs were calculated as [(|left-right|)/(left + right) * 100] and expressed as a percent (%). CMJ kinetics included eccentric impulse (ECC-IMP), concentric impulse (CON-IMP), eccentric mean force (ECC-MEAN-FORCE) and concentric mean force (CON-MEANFORCE). Pearson Product Correlation Coefficients showed mean vGRF asymmetry (1.2±0.8%) from the run was significantly positively associated with CON-IMP (5.6±4.6%), r=0.477, p=0.037 and CONMEAN-FORCE (5.6±4.6%), r=0.477, p=0.037 asymmetry from the CMJ. Mean vGRF asymmetry from the run was not associated with CMJ ECC-IMP (9.6±7.0%) r=-0.29, p=0.899 or ECC-MEAN-FORCE (7.7±6.0%), r=0.198, p=0.378 asymmetry. ECC asymmetries were also larger than CON and running asymmetries. Measuring CMJ propulsion phase forces throughout a runner’s competitive season or rehabilitation program may provide insight into monitoring kinetic asymmetry during an actual run. CMJ loading phase asymmetries do not appear related to running asymmetries.
