Fig. 3
Correlation between cross-sectional area and muscle volume of the gluteus medius and muscle strength of hip abductor. a Cross-sectional area (CSA) and 3D muscle volume of the GMED were strongly correlated (r2 = 0.82, p < 0.05). b and c CSA and muscle volume measurements were both positively correlated with muscle strength of the hip abductor (r2 = 0.50, p < 0.05 and r2 = 0.40, p < 0.05, respectively)