No two people squat the exact same, therefore everyone needs different cues in order to fix problems that arise in the squat. With this cue used in the video, it helps someone who maybe doesn’t have an arch in their foot which results in an excessive pronated ankle, which in turn will cause the knees to cave. There are plenty of cues out there to help people with technical errors within a wide range of lifts – this being just one for the squat. Check it out and see if it helps you!