Mechanism and timing effects on the kinematics and kinetics of the running and cutting motion Public Deposited

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  • March 21, 2019
  • Preston, Jennifer Jacqueline
    • Affiliation: School of Medicine, UNC/NCSU Joint Department of Biomedical Engineering
  • This study examines the lower extremity biomechanics, kinematics and kinetics during cutting maneuvers performed by recreational athletes by comparing the effects of anticipation, gender and training on the biomechanics of the cutting maneuver. Ankle, knee and hip injuries are thought to most likely to occur when performing such cutting maneuver. Understanding the dynamics of motions during cutting is the first step to prevent such injuries. Previous studies have compared the cutting maneuver to a straight-ahead run, however a more typical situation is an abrupt unanticipated change of direction. The hypothesis of this study is that decreasing the time between when an athlete is given a signal to the direction of a cutting maneuver and the performance of that cutting maneuver changes the motion dynamic which would lead to the increased risk of injury, specifically at the knee. Thirty-three recreational athletes (16 women and 17 men) participated in this study. Each of the subjects performed the three timing conditions (preplanned, planned and unplanned) for cutting in both the left and right directions and the straight-ahead run. A total of 46 dependent variables were examined for this study including: peak moments and angles at the ankle, knee and hip joints along with GRF, and trunk movement. There were significant difference found between the cutting maneuver compared to the straight-ahead run at the ankle, knee and hip joints. For the timing condition only the trunk rotation was found to be significantly different between unplanned and preplanned timing conditions for both the left and right cutting maneuvers (p<.005). Leg dominance significantly effected moments at the ankle and knee joints. The non-dominant leg was found to be potentially more susceptible to injury than the dominant leg. A significant difference in hip movement between men and women was identified with women showing more hip adduction than men (p<.039). Experience or training was found to have a significant effect on maximum dorsiflexion angle with the less experienced subjects having larger dorsiflexion angles.
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  • Yu, Bing
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