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Overview

The forward lunge is a fundamental movement assessment that evaluates an athlete’s ability to perform a stepping motion with proper form and stability. This movement is commonly used in athletic assessment and training as it provides valuable information about lower extremity strength, balance, and movement patterns.

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Instructions

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Dimensions

Required inputs for processing:
  • Arm Position: [‘arm-swing’,‘hands-on-hips’]

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Events

MetricDescriptionColumn Name
Initiationthe start of the lungelunge_initiation_frame
Bottomwhen the front foot leaves the groundlunge_bottom_frame
Terminationthe end of the movementlunge_end_frame

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Phases and Stages of the Lunge

PhaseStageStartEndEvent or Phase
PreparationStep ForwardInitiationFront Foot ContactPhase
LoadingDescentFront Foot ContactPeak Knee FlexionPhase
LoadingAscentPeak Knee FlexionFront Foot LiftPhase
RecoveryStep BackFront Foot LiftTerminationPhase

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Discrete Metrics

MetricUnitsDescriptionColumn Name
Step LengthmetersDistance between feet at front foot contact“
Knee FlexiondegreesMaximum knee flexion of front leg“
Right Valgus BottommetersRight knee valgus at bottom positionright_knee_valgus_at_bottom
Left Valgus BottommetersLeft knee valgus at bottom positionleft_knee_valgus_at_bottom
Right Valgus LandingmetersRight knee valgus at landingright_knee_valgus_at_landing
Left Valgus LandingmetersLeft knee valgus at landingleft_knee_valgus_at_landing
Right Valgus Landing BottommetersRight knee valgus at landing bottomright_knee_valgus_at_landing_bottom
Left Valgus Landing BottommetersLeft knee valgus at landing bottomleft_knee_valgus_at_landing_bottom
Right Valgus Landing FullmetersMaximum right knee valgus during landingright_knee_valgus_full_landing
Left Valgus Landing FullmetersMaximum left knee valgus during landingleft_knee_valgus_full_landing
Right Eccentric Hip Knee DominanceratioRight hip-knee dominance during eccentric phase (0=hip dominant, 1=knee dominant)right_eccentric_hip_knee_dominance
Left Eccentric Hip Knee DominanceratioLeft hip-knee dominance during eccentric phase (0=hip dominant, 1=knee dominant)left_eccentric_hip_knee_dominance
Right Concentric Hip Knee DominanceratioRight hip-knee dominance during concentric phase (0=hip dominant, 1=knee dominant)right_concentric_hip_knee_dominance
Left Concentric Hip Knee DominanceratioLeft hip-knee dominance during concentric phase (0=hip dominant, 1=knee dominant)left_concentric_hip_knee_dominance

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Notes

  • Kinematic data typically captured at 60Hz for Lunging