Skip to main content

​
Overview

The countermovement jump is a fundamental movement assessment that involves a rapid downward movement (countermovement) followed immediately by an explosive upward jump. This movement is commonly used in athletic assessment and training as it provides valuable information about an athlete’s explosive power, neuromuscular coordination, and lower extremity function.

​
Instructions

​
Dimensions

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

​
Events

MetricDescriptionColumn Name
Initiationthe start of the jump - when the person begins to move downwawrdjump_initiation_frame
Bottomthe lowest point of the pelvis before the jumpbottom_of_jump_frame
Takeoffthe instant of leaving the groundtakeoff_frame
Peak Heightthe instant when maximum height reached“
Landingthe instant of ground contactjump_landing_frame
Landing Bottomthe lowest point of the pelvis after the jumpbottom_of_landing_frame
Terminationend of the movement - when the person returns to normal standing positionjump_termination_frame

​
Phases of the Jump

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

​
Discrete Metrics

MetricUnitsDescriptionColumn Name
Jump HeightmetersMaximum height reached during the jumpjump_height
Flight TimesecondsTime from takeoff to landingjump_flight_time
Takeoff Velocitym/sVertical velocity at takeofftakeoff_velocity
RSI ModN/AReactive Strength Index Modifiedreactive_strength_index_modified
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
Eccentric Hip Knee DominanceratioHip-knee dominance during eccentric phase (0=hip dominant, 1=knee dominant)eccentric_hip_knee_dominance
Concentric Hip Knee DominanceratioHip-knee dominance during concentric phase (0=hip dominant, 1=knee dominant)concentric_hip_knee_dominance
Landing Hip Knee DominanceratioHip-knee dominance during landing phase (0=hip dominant, 1=knee dominant)landing_hip_knee_dominance
Right DisplacementmetersLateral displacement during landing“
Forward DisplacementmetersForward displacement during landing“
Landing Stiffness IndexN/AIndex of landing stiffness“
Landing Stiffness Index LevelN/AClassification of landing stiffness“
Eccentric Velocitym/sAverage velocity during eccentric phase“
Knees TrackbinaryBinary indicator if knees track properly (1=yes, 0=no)“
Hips Feet StationarybinaryBinary indicator if hips and feet remain stationary“
High Jump HeightbinaryBinary indicator if jump height exceeds 14 inches“
Stiff Knee LandingbinaryBinary indicator of stiff knee landing“
Left Peak Hip Flexion TakeoffdegreesMaximum left hip flexion during takeoffjumping_left_hip_peak_flexion_angle
Right Peak Hip Flexion TakeoffdegreesMaximum right hip flexion during takeoffjumping_right_hip_peak_flexion_angle
Left Peak Knee Flexion TakeoffdegreesMaximum left knee flexion during takeoffjumping_left_knee_peak_flexion_angle
Right Peak Knee Flexion TakeoffdegreesMaximum right knee flexion during takeoffjumping_right_knee_peak_flexion_angle
Left Peak Ankle Flexion TakeoffdegreesMaximum left ankle flexion during takeoffjumping_left_ankle_peak_flexion_angle
Right Peak Ankle Flexion TakeoffdegreesMaximum right ankle flexion during takeoffjumping_right_ankle_peak_flexion_angle
Left Peak Hip Extension Velocity Takeoff Concentricdegrees/sMaximum left hip extension velocity during concentric phasejumping_left_hip_peak_extension_velocity
Right Peak Hip Extension Velocity Takeoff Concentricdegrees/sMaximum right hip extension velocity during concentric phasejumping_right_hip_peak_extension_velocity
Left Peak Knee Extension Velocity Takeoff Concentricdegrees/sMaximum left knee extension velocity during concentric phasejumping_left_knee_peak_extension_velocity
Right Peak Knee Extension Velocity Takeoff Concentricdegrees/sMaximum right knee extension velocity during concentric phasejumping_right_knee_peak_extension_velocity
Left Peak Ankle Extension Velocity Takeoff Concentricdegrees/sMaximum left ankle extension velocity during concentric phasejumping_left_ankle_peak_extension_velocity
Right Peak Ankle Extension Velocity Takeoff Concentricdegrees/sMaximum right ankle extension velocity during concentric phasejumping_right_ankle_peak_extension_velocity
Peak COM Velocity Takeoff Concentricm/sMaximum center of mass velocity during concentric phasejumping_com_peak_velocity
Left Peak Hip Flexion LandingdegreesMaximum left hip flexion during landinglanding_left_hip_peak_flexion_angle
Right Peak Hip Flexion LandingdegreesMaximum right hip flexion during landinglanding_right_hip_peak_flexion_angle
Left Peak Knee Flexion LandingdegreesMaximum left knee flexion during landinglanding_left_knee_peak_flexion_angle
Right Peak Knee Flexion LandingdegreesMaximum right knee flexion during landinglanding_right_knee_peak_flexion_angle
Left Peak Ankle Flexion LandingdegreesMaximum left ankle flexion during landinglanding_left_ankle_peak_flexion_angle
Right Peak Ankle Flexion LandingdegreesMaximum right ankle flexion during landinglanding_right_ankle_peak_flexion_angle
Left Peak Hip Flexion Velocity Landing Eccentricdegrees/sMaximum left hip flexion velocity during landing eccentric phaselanding_left_hip_peak_flexion_velocity
Right Peak Hip Flexion Velocity Landing Eccentricdegrees/sMaximum right hip flexion velocity during landing eccentric phaselanding_right_hip_peak_flexion_velocity
Left Peak Knee Flexion Velocity Landing Eccentricdegrees/sMaximum left knee flexion velocity during landing eccentric phaselanding_left_knee_peak_flexion_velocity
Right Peak Knee Flexion Velocity Landing Eccentricdegrees/sMaximum right knee flexion velocity during landing eccentric phaselanding_right_knee_peak_flexion_velocity
Left Peak Ankle Flexion Velocity Landing Eccentricdegrees/sMaximum left ankle flexion velocity during landing eccentric phaselanding_left_ankle_peak_flexion_velocity
Right Peak Ankle Flexion Velocity Landing Eccentricdegrees/sMaximum right ankle flexion velocity during landing eccentric phaselanding_right_ankle_peak_flexion_velocity
Peak COM Velocity Landing Eccentricm/sMaximum center of mass velocity during landing eccentric phaselanding_com_peak_velocity
Kinematic SequenceN/ASequence of peak velocities during the jump“
Kinematic Sequence ArrayN/AArray representation of kinematic sequence“
Left Thigh Sagittal Angle WRT GlobaldegSagittal angle of the thigh compared to global coordinate systemleft_thigh_angle_global_sagittal
Left Thigh Frontal Angle WRT GlobaldegSagittal angle of the thigh compared to global coordinate systemleft_thigh_angle_global_frontal
Left Thigh Twist Angle WRT GlobaldegSagittal angle of the thigh compared to global coordinate systemleft_thigh_angle_global_twist
Left Shank Sagittal Angle WRT GlobaldegSagittal angle of the shank (lower leg) compared to global coordinate systemleft_shank_angle_global_sagittal
Left Shank Frontal Angle WRT GlobaldegSagittal angle of the shank (lower leg) compared to global coordinate systemleft_shank_angle_global_frontal
Left Shank Twist Angle WRT GlobaldegSagittal angle of the shank (lower leg) compared to global coordinate systemleft_shank_angle_global_twist
Right Thigh Sagittal Angle WRT GlobaldegSagittal angle of the thigh compared to global coordinate systemright_thigh_angle_global_sagittal
Right Thigh Frontal Angle WRT GlobaldegSagittal angle of the thigh compared to global coordinate systemright_thigh_angle_global_frontal
Right Thigh Twist Angle WRT GlobaldegSagittal angle of the thigh compared to global coordinate systemright_thigh_angle_global_twist
Right Shank Sagittal Angle WRT GlobaldegSagittal angle of the shank (lower leg) compared to global coordinate systemright_shank_angle_global_sagittal
Right Shank Frontal Angle WRT GlobaldegSagittal angle of the shank (lower leg) compared to global coordinate systemright_shank_angle_global_frontal
Right Shank Twist Angle WRT GlobaldegSagittal angle of the shank (lower leg) compared to global coordinate systemright_shank_angle_global_twist

​
Notes

  • Kinematic data typically captured at 120Hz for Jumping