Okay, I'm doing this exercise while standing on the balance board. When I tap my left foot on the left side of the board (while standing on right foot), it registers perfectly. But when I try to tap my left foot on the right side of the board (still standing on right foot), I get a 0 score no matter what. Same for the other side (standing on left foot, tapping right foot on left side).
What am I doing wrong??