Author ORCID Identifier

ORCiD: 0000-0002-4535-0325

Advisor Information

Jennifer M Yentes

Location

Criss Library, University of Nebraska at Omaha

Presentation Type

Poster

Start Date

1-3-2019 12:30 PM

End Date

1-3-2019 1:45 PM

Abstract

Vertical jumping is one of the popular ways to evaluate ankle-knee efficiency in athletic population. Arm swing can play a crucial role in enhancing vertical jump performance. This study aimed to address the differences in kinetic and kinematic parameters during countermovement jump motion with arm swing (AS) and no arm swing (NAS). We used OpenSim to examine the efficacy of AS in reducing the impulse applied to the body and changes in range of lower limb joint angles at landing instant. We calculated the maximum vertical peak of the ground reaction force and impulse generated at landing in two different conditions (AS and NAS). Participants were asked to perform ten countermovement jumps, five for AS and five for AS. We measured kinematics and kinetics by using motion capture and ground reaction forces using a force treadmill. Means and standard deviations of kinetic and kinematic outcomes were calculated across conditions. Hip and ankle power were significantly higher during NAS compared to AS condition at landing instant. The results of this study showed that AS jump could reduce the generated powers at the ankle and hip joints during instant landing compared to the NAS condition. This could be due to the compensatory role of the shoulder and elbow joints to prepare the body for the landing phase. The study did not have enough statistical power to reveal differences between other kinetic and kinematic components of jumping, which could be further enhanced by increasing the sample size.

COinS
 
Mar 1st, 12:30 PM Mar 1st, 1:45 PM

THE EFFECT OF ARM SWING ON COUNTERMOVEMENT VERTICAL JUMP PERFORMANCE

Criss Library, University of Nebraska at Omaha

Vertical jumping is one of the popular ways to evaluate ankle-knee efficiency in athletic population. Arm swing can play a crucial role in enhancing vertical jump performance. This study aimed to address the differences in kinetic and kinematic parameters during countermovement jump motion with arm swing (AS) and no arm swing (NAS). We used OpenSim to examine the efficacy of AS in reducing the impulse applied to the body and changes in range of lower limb joint angles at landing instant. We calculated the maximum vertical peak of the ground reaction force and impulse generated at landing in two different conditions (AS and NAS). Participants were asked to perform ten countermovement jumps, five for AS and five for AS. We measured kinematics and kinetics by using motion capture and ground reaction forces using a force treadmill. Means and standard deviations of kinetic and kinematic outcomes were calculated across conditions. Hip and ankle power were significantly higher during NAS compared to AS condition at landing instant. The results of this study showed that AS jump could reduce the generated powers at the ankle and hip joints during instant landing compared to the NAS condition. This could be due to the compensatory role of the shoulder and elbow joints to prepare the body for the landing phase. The study did not have enough statistical power to reveal differences between other kinetic and kinematic components of jumping, which could be further enhanced by increasing the sample size.