Figure 3. Bivariate relationships between 30-m sprint speed and influential bilateral asymmetry by gender (A. Percent Difference in Vastus Lateralis Muscle Thickness; B. Percent Difference in Rectus Femoris Echo Intensity). Note: Solid Black Circles = Men; Open Circles = Women; Solid Black Line = Line of Best Fit for Men; Dashed Line = Line of Best Fit for Women