These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Sagittal plane body kinematics and kinetics during single-leg landing from increasing vertical heights and horizontal distances: implications for risk of non-contact ACL injury.
    Author: Ali N, Robertson DG, Rouhi G.
    Journal: Knee; 2014 Jan; 21(1):38-46. PubMed ID: 23274067.
    Abstract:
    PURPOSE: This study identified kinematic and knee energetic variables that reduce the risk of non-contact anterior cruciate ligament (ACL) injury during single-leg landings from increasing vertical heights and horizontal distances. METHODS: Nine subjects performed single-leg landings from takeoff platforms with vertical heights of 20, 40, and 60 cm onto a force plate. Subjects also performed single-leg landings from a 40 cm high takeoff platform placed at horizontal distances of 30, 50 and 70 cm from a force plate. Kinematic and kinetic data were measured. RESULTS: Vertical height had a significant and positive effect on peak vertical ground reaction force (VGRF) (p<0.001), peak posterior ground reaction force (PGRF) (p=0.004), knee flexion angle (p=0.0043), trunk flexion angle (p=0.03), knee power (p<0.001) and knee work (p<0.001). There was also a significant and positive effect of horizontal distance on peak PGRF (p<0.001), ankle plantar flexion angle (p=0.008), hip flexion angle (p=0.007), and trunk flexion angle (p=0.001). At increasing vertical height, peak VGRF was significantly correlated to ankle plantar flexion and knee flexion angles (r=-0.77, p=0.02 and r=-0.78, p=0.01, respectively). At increasing horizontal distance, peak PGRF was significantly correlated to ankle plantar flexion angle, knee power and knee work (r=-0.85, p=0.003; r=0.67, p=0.04; and r=0.73, p=0.02, respectively). CLINICAL RELEVANCE: A better understanding of the risk factors to non-contact ACL injury during single-leg landings from increasing vertical heights and horizontal distances can aid in the design of injury prevention regimen.
    [Abstract] [Full Text] [Related] [New Search]