Single Leg Squat

Overview

Events

MetricData TypeDescription
InitiationIntthe start of the squat
Descent StartIntthe start of downward movement
BottomIntthe instant of maximum squat depth
Bottom1Intthe first instance of maximum squat depth
Ascent StartIntthe start of upward movement
EndIntthe end of the movement

Phases and Stages of the Squat

PhaseStageStartEndEvent or Phase
DescentEccentricDescent StartBottomPhase
AscentConcentricBottomEndPhase

Discrete Metrics

MetricData TypeUnitsDescription
Left Valgus BottomFloatmetersLeft knee valgus at bottom position (left leg squat)
Right Valgus BottomFloatmetersRight knee valgus at bottom position (right leg squat)
Left Valgus Eccentric FullFloatmetersMaximum left knee valgus during eccentric phase (left leg squat)
Right Valgus Eccentric FullFloatmetersMaximum right knee valgus during eccentric phase (right leg squat)
Left Valgus Concentric FullFloatmetersMaximum left knee valgus during concentric phase (left leg squat)
Right Valgus Concentric FullFloatmetersMaximum right knee valgus during concentric phase (right leg squat)
Left Eccentric Hip-Knee DominanceFloatratioHip-knee dominance during eccentric phase for left leg (0=hip dominant, 1=knee dominant)
Right Eccentric Hip-Knee DominanceFloatratioHip-knee dominance during eccentric phase for right leg (0=hip dominant, 1=knee dominant)
Left Concentric Hip-Knee DominanceFloatratioHip-knee dominance during concentric phase for left leg (0=hip dominant, 1=knee dominant)
Right Concentric Hip-Knee DominanceFloatratioHip-knee dominance during concentric phase for right leg (0=hip dominant, 1=knee dominant)
DepthFloatmetersVertical displacement of pelvis from start to bottom
Max Trunk AngleFloatdegreesMaximum trunk angle relative to vertical
Bottom TimeFloatsecondsTime spent at bottom position
ContinuousIntN/AWhether squat is continuous (1) or has pause (0)
Eccentric VelocityFloatm/sAverage velocity during eccentric phase
Concentric VelocityFloatm/sAverage velocity during concentric phase
Vertical Hip Lower Than Vertical KneeIntN/AWhether hips go below knees (1) or not (0)
Vertical Hip Lower Than Vertical Knee DistanceFloatmetersDistance between hip and knee at bottom
Trunk Tibia ParallelIntN/AWhether trunk and tibia are parallel (1) or not (0)
Trunk Tibia AngleFloatdegreesAngle between trunk and tibia
Hips Feet StationaryIntN/AWhether hips and feet remain stationary (1) or not (0)
Knees TrackIntN/AWhether knees track properly (1) or not (0)
Sufficient Knee FlexionIntN/AWhether knee flexion is sufficient (1) or not (0)
Peak Hip FlexionFloatdegreesMaximum hip flexion angle of stance leg
Peak Knee FlexionFloatdegreesMaximum knee flexion angle of stance leg
Peak Ankle FlexionFloatdegreesMaximum ankle flexion angle of stance leg
Peak Hip Flexion Velocity EccentricFloatdegrees/sMaximum hip flexion velocity during eccentric phase
Peak Knee Flexion Velocity EccentricFloatdegrees/sMaximum knee flexion velocity during eccentric phase
Peak Ankle Flexion Velocity EccentricFloatdegrees/sMaximum ankle flexion velocity during eccentric phase
Peak COM Velocity EccentricFloatm/sMaximum center of mass velocity during eccentric phase
Peak Hip Extension Velocity ConcentricFloatdegrees/sMaximum hip extension velocity during concentric phase
Peak Knee Extension Velocity ConcentricFloatdegrees/sMaximum knee extension velocity during concentric phase
Peak Ankle Extension Velocity ConcentricFloatdegrees/sMaximum ankle extension velocity during concentric phase
Peak COM Velocity ConcentricFloatm/sMaximum center of mass velocity during concentric phase

Notes

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