Vertical Takeoff Acceleration Asymmetry

A measure of the difference in Vertical Takeoff Acceleration (VTA) between feet. High VTA asymmetry (>15%) occurs when one side leaves the ground at a faster rate than the other. This can mean either poorer push ability on one side, or a protective strategy to swing the leg through instead of pushing it off. When combined with larger GCT asymmetry on the same side, high VTA asymmetry can indicate that the opposite limb is fatigued, weak, or experiencing pain. When combined with larger GCT asymmetry on the opposite side, high VTA asymmetry can indicate weaker ankle musculature.

Asymmetry measures are best used in conjunction with a baseline for each individual, as every person has inherent asymmetries.