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UW Neuromuscular Biomechanics
Lab
Clinical Video Analysis for
Distance Runners
Bryan Heiderscheit, PT, PhD, FAPTA Professor
Orthopedics and Rehabilitation
Biomedical Engineering
Director, UW Runners’ Clinic
Director of Research, Badger Athletic Performance
Co-director, UW Neuromuscular Biomechanics Lab
UW Neuromuscular Biomechanics
Lab
Disclosures
I have no financial affiliation or involvement with any commercial organization that has a direct financial interest in any matter included in this presentation.
UW Neuromuscular Biomechanics
Lab
Equipment
120 fps camera
tripod
treadmill
Stiff deck
Adequate HP
treadmill
sagittal view
frontal view
UW Neuromuscular Biomechanics
Lab
Video Capture Procedure
Patient selects speed that reflects:
typical running speed
pain provocation
If needed, simulate fatigue by having them run before
0 incline
Run for 5 min before recording
Record:
10s sagittal
10s posterior-frontal
UW Neuromuscular Biomechanics
Lab
Key Parameters
Focus on loading response (initial contact to mid-stance)
characterize body control during energy absorption
Remainder of stride cycle is also examined
Initial contact Midstance
Loading Response
UW Neuromuscular Biomechanics
Lab
Step Rate Foot Inclination Angle at Initial Contact
Vertical Displacement of COM
Kinematic Predictors of Kinetics Peak GRFv
Peak Vertical GRF
(R2=0.48)
Wille et al. (2014). J Orthop Sports Phys Ther
UW Neuromuscular Biomechanics
Lab
Step Rate Heel to COM Distance at Initial Contact
Foot Inclination Angle at Initial Contact
Vertical Displacement of COM
Kinematic Predictors of Kinetics Braking Impulse
Braking Impulse
(R2=0.50)
Wille et al. (2014). J Orthop Sports Phys Ther
UW Neuromuscular Biomechanics
Lab
Step Rate Foot Inclination Angle at Initial Contact
Peak Knee Flexion during Stance
Kinematic Predictors of Kinetics Energy Absorption at Knee
Mechanical Energy Absorbed about the Knee (R2=0.58)
Wille et al. (2014). J Orthop Sports Phys Ther
UW Neuromuscular Biomechanics
Lab
Pseudo-quantitative Approach
Estimate load to body based on posture at landing and midstance
Use physical exam findings to interpret appropriateness of running mechanics
Each parameter is assessed using 3-pt or 5-pt scale
Consideration for the inherent limitations with 2D video analysis
Key parameters demonstrated strong agreement between raters (κ > 0.80)