Calculate step symmetry from gait parameters — calculateStepSymmetry • PhysioMoCap

Computes symmetry metrics comparing left and right sides. Includes the Robinson Symmetry Index and the left/right ratio for each parameter.

Usage

calculateStepSymmetry(gait_params)

Arguments

gait_params: A gait_parameters object from calculateGaitParameters() containing both left and right sides.

Value

A data.frame with columns:

parameter: Name of the gait parameter
left_mean: Mean value for the left side
right_mean: Mean value for the right side
SI: Robinson Symmetry Index: |L - R| / (0.5 * (L + R)) * 100
ratio: Left / Right ratio

Details

A Symmetry Index (SI) of 0 indicates perfect symmetry. Values above 10 are generally considered clinically asymmetric.

References

Winter DA (2009). "Biomechanics and Motor Control of Human Movement." 4th ed. John Wiley & Sons.

See also

calculateGaitParameters() for computing gait temporal-spatial parameters, symmetryIndex() for general symmetry index computation, plotSymmetry() for symmetry visualization.

Examples

# See test file for worked examples