Data Processing

Processed model in Vicon Nexus software. 

Vicon Nexus

• Kinematic, kinetic, and EMG data are collected using Vicon Nexus software (2.11.0)
• Data quality is checked and exported to V3D files

Visual 3D

• Data are processed in Visual 3D
  • Kinematic and kinetic data are low-pass filtered with a dual-pass Butterworth filter
  • Cut-off frequency 8 Hz and 50 Hz, respectively

• Variables to be looked at: 
  • Initial contact sagittal plane angle (hip, knee)
  • Frontal plane angle @ max. knee flexion (hip, knee)
  • Frontal plane angle during landing (initial contact-max knee flexion) (hip, knee)
  • Trunk flexion angle @ initial contact
  • Peak ground reaction force
  • Peak sagittal plane joint moment (hip, knee)
  • Peak frontal plane joint moment (hip, knee)
  • Muscle activation 50ms prior to initial contact (Quadriceps, Hamstrings)
  • Muscle activation 100ms following initial contact (Quadriceps, Hamstrings)

Statistical analysis will be done using SPSS software following the completion of the study.

• 2x2 Multivariate Analysis of Variance (MANOVA) 
  • Landing (1, 2) x Jump (DVJ, SSVJ)
  • p < 0.05

• Follow up tests will be run where necessary