Single Leg Stance

Overview

Single leg stance is a fundamental balance exercise and a common component of everyday movement, from walking and running to climbing stairs.

Stand upright on one leg while the other leg is lifted off the ground. For greater challenge, repeat with eyes closed.

Required inputs for processing:

Metric	Description	Column Name
Initiation	the start of the single leg stance	“
End	the end of the single leg stance	“

Metric	Units	Description	Column Name
Stance Time	seconds	Duration of the single leg stance	`single_leg_stance_stance_time`
Stance Time Clearance	-	Whether stance time passed threshold (1) or not (0)	`single_leg_stance_time_clearance`
Mean Sway Velocity	m/s	Average velocity of body center of mass during stance	`single_leg_stance_mean_sway_velocity`
Percentile 75 Sway Velocity	m/s	75th percentile of sway velocity during stance	`single_leg_stance_percentile75_sway_velocity`
Mediolateral Displacement	meters	Maximum range of mediolateral (left/right) displacement of center of mass	`single_leg_stance_mediolateral_displacement`
Anteroposterior Displacement	meters	Maximum range of anteroposterior (forward/backward) displacement of center of mass	`single_leg_stance_anteroposterior_displacement`
Sway Area	m²	Square area of sway calculated from the product of ML and AP displacement	`single_leg_stance_sway_area`
Left Trunk Lean	degrees	Maximum left trunk lean in frontal plane	“
Right Trunk Lean	degrees	Maximum right trunk lean in frontal plane	“
Excessive Trunk Lean	-	Whether trunk lean exceeds threshold (1) or not (0)	`single_leg_stance_excessive_trunk_lean`