From: Toward more reliable stability measurements in stance: recommendations for number of measurements, foot position and feedback -- a cross-sectional study among servicemen
Position
r
R2
p
Wide stance and small stance
 Without feedback
0.642
0.412
0.002*
Wide stance and one leg stance
0.090
0.008
0.705
Small stance and one leg stance
0.457
0.209
0.043*