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Drop Vertical Jump

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Overview

The drop vertical jump is a plyometric movement assessment that involves dropping from a platform and immediately performing an explosive vertical jump upon landing. This movement is commonly used in athletic assessment and injury prevention screening as it provides valuable information about landing mechanics, reactive strength, and lower extremity neuromuscular control.

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Events

MetricData TypeDescription
InitiationIntthe start of the jump - when the person begins to move downwawrd
BottomIntthe lowest point of the pelvis before the jump
TakeoffIntthe instant of leaving the ground
Peak HeightIntthe instant when maximum height reached
LandingIntthe instant of ground contact
Landing BottomIntthe lowest point of the pelvis after the jump
TerminationIntend of the movement - when the person returns to normal standing position

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Phases of the Jump

PhaseStartEnd
JumpingInitiationTakeoff
Jumping EccentricInitiationBottom
Jumping ConcentricBottomTakeoff
LandingLandingTermination
Landing EccentricLandingLanding Bottom
Landing ConcentricLanding BottomTermination

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Discrete Metrics

MetricData TypeUnitsDescription
Jump HeightFloatmetersMaximum height reached during the jump
Flight TimeFloatsecondsTime from takeoff to landing
Takeoff VelocityFloatm/sVertical velocity at takeoff
RSI ModFloatN/AReactive Strength Index Modified
Right Valgus BottomFloatmetersRight knee valgus at bottom position
Left Valgus BottomFloatmetersLeft knee valgus at bottom position
Right Valgus LandingFloatmetersRight knee valgus at landing
Left Valgus LandingFloatmetersLeft knee valgus at landing
Right Valgus Landing BottomFloatmetersRight knee valgus at landing bottom
Left Valgus Landing BottomFloatmetersLeft knee valgus at landing bottom
Right Valgus Landing FullFloatmetersMaximum right knee valgus during landing
Left Valgus Landing FullFloatmetersMaximum left knee valgus during landing
Eccentric Hip Knee DominanceFloatratioHip-knee dominance during eccentric phase (0=hip dominant, 1=knee dominant)
Concentric Hip Knee DominanceFloatratioHip-knee dominance during concentric phase (0=hip dominant, 1=knee dominant)
Landing Hip Knee DominanceFloatratioHip-knee dominance during landing phase (0=hip dominant, 1=knee dominant)
Right DisplacementFloatmetersLateral displacement during landing
Forward DisplacementFloatmetersForward displacement during landing
Landing Stiffness IndexFloatN/AIndex of landing stiffness
Landing Stiffness Index LevelStringN/AClassification of landing stiffness
Eccentric VelocityFloatm/sAverage velocity during eccentric phase
Knees TrackIntbinaryBinary indicator if knees track properly (1=yes, 0=no)
Hips Feet StationaryIntbinaryBinary indicator if hips and feet remain stationary
High Jump HeightIntbinaryBinary indicator if jump height exceeds 14 inches
Stiff Knee LandingIntbinaryBinary indicator of stiff knee landing
Left Peak Hip Flexion TakeoffFloatdegreesMaximum left hip flexion during takeoff
Right Peak Hip Flexion TakeoffFloatdegreesMaximum right hip flexion during takeoff
Left Peak Knee Flexion TakeoffFloatdegreesMaximum left knee flexion during takeoff
Right Peak Knee Flexion TakeoffFloatdegreesMaximum right knee flexion during takeoff
Left Peak Ankle Flexion TakeoffFloatdegreesMaximum left ankle flexion during takeoff
Right Peak Ankle Flexion TakeoffFloatdegreesMaximum right ankle flexion during takeoff
Left Peak Hip Flexion Velocity Takeoff EccentricFloatdegrees/sMaximum left hip flexion velocity during eccentric phase
Right Peak Hip Flexion Velocity Takeoff EccentricFloatdegrees/sMaximum right hip flexion velocity during eccentric phase
Left Peak Knee Flexion Velocity Takeoff EccentricFloatdegrees/sMaximum left knee flexion velocity during eccentric phase
Right Peak Knee Flexion Velocity Takeoff EccentricFloatdegrees/sMaximum right knee flexion velocity during eccentric phase
Left Peak Ankle Flexion Velocity Takeoff EccentricFloatdegrees/sMaximum left ankle flexion velocity during eccentric phase
Right Peak Ankle Flexion Velocity Takeoff EccentricFloatdegrees/sMaximum right ankle flexion velocity during eccentric phase
Peak COM Velocity Takeoff EccentricFloatm/sMaximum center of mass velocity during eccentric phase
Left Peak Shoulder Flexion Velocity Takeoff ConcentricFloatdegrees/sMaximum left shoulder flexion velocity during concentric phase
Right Peak Shoulder Flexion Velocity Takeoff ConcentricFloatdegrees/sMaximum right shoulder flexion velocity during concentric phase
Left Peak Hip Extension Velocity Takeoff ConcentricFloatdegrees/sMaximum left hip extension velocity during concentric phase
Right Peak Hip Extension Velocity Takeoff ConcentricFloatdegrees/sMaximum right hip extension velocity during concentric phase
Left Peak Knee Extension Velocity Takeoff ConcentricFloatdegrees/sMaximum left knee extension velocity during concentric phase
Right Peak Knee Extension Velocity Takeoff ConcentricFloatdegrees/sMaximum right knee extension velocity during concentric phase
Left Peak Ankle Extension Velocity Takeoff ConcentricFloatdegrees/sMaximum left ankle extension velocity during concentric phase
Right Peak Ankle Extension Velocity Takeoff ConcentricFloatdegrees/sMaximum right ankle extension velocity during concentric phase
Peak COM Velocity Takeoff ConcentricFloatm/sMaximum center of mass velocity during concentric phase
Left Peak Hip Flexion LandingFloatdegreesMaximum left hip flexion during landing
Right Peak Hip Flexion LandingFloatdegreesMaximum right hip flexion during landing
Left Peak Knee Flexion LandingFloatdegreesMaximum left knee flexion during landing
Right Peak Knee Flexion LandingFloatdegreesMaximum right knee flexion during landing
Left Peak Ankle Flexion LandingFloatdegreesMaximum left ankle flexion during landing
Right Peak Ankle Flexion LandingFloatdegreesMaximum right ankle flexion during landing
Left Peak Hip Flexion Velocity Landing EccentricFloatdegrees/sMaximum left hip flexion velocity during landing eccentric phase
Right Peak Hip Flexion Velocity Landing EccentricFloatdegrees/sMaximum right hip flexion velocity during landing eccentric phase
Left Peak Knee Flexion Velocity Landing EccentricFloatdegrees/sMaximum left knee flexion velocity during landing eccentric phase
Right Peak Knee Flexion Velocity Landing EccentricFloatdegrees/sMaximum right knee flexion velocity during landing eccentric phase
Left Peak Ankle Flexion Velocity Landing EccentricFloatdegrees/sMaximum left ankle flexion velocity during landing eccentric phase
Right Peak Ankle Flexion Velocity Landing EccentricFloatdegrees/sMaximum right ankle flexion velocity during landing eccentric phase
Peak COM Velocity Landing EccentricFloatm/sMaximum center of mass velocity during landing eccentric phase
Left Peak Hip Extension Velocity Landing ConcentricFloatdegrees/sMaximum left hip extension velocity during landing concentric phase
Right Peak Hip Extension Velocity Landing ConcentricFloatdegrees/sMaximum right hip extension velocity during landing concentric phase
Left Peak Knee Extension Velocity Landing ConcentricFloatdegrees/sMaximum left knee extension velocity during landing concentric phase
Right Peak Knee Extension Velocity Landing ConcentricFloatdegrees/sMaximum right knee extension velocity during landing concentric phase
Left Peak Ankle Extension Velocity Landing ConcentricFloatdegrees/sMaximum left ankle extension velocity during landing concentric phase
Right Peak Ankle Extension Velocity Landing ConcentricFloatdegrees/sMaximum right ankle extension velocity during landing concentric phase
Peak COM Velocity Landing ConcentricFloatm/sMaximum center of mass velocity during landing concentric phase
Kinematic SequenceStringN/ASequence of peak velocities during the jump
Kinematic Sequence ArrayArrayN/AArray representation of kinematic sequence

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Notes

  • All angular measurements follow ISB conventions
  • Kinematic data typically captured at 240Hz for Jumping