Changes in muscle features associated with change in muscle fiber cross-sectional area (fCSA). Pearson correlations for univariant comparisons and multiple linear regression adjusting for sex (standardized betas) and variable by sex to identify sex interactions are shown. Scatter plots show percent change in fCSA was positively correlated to change in capillary density (A, n = 32), myonuclei (MN; B) (n = 30), CD11b+CD206+ (C, n = 32), and CD11b+CD206− (D, n = 32) cell abundance. There was a trend for the change in CD11b+CD206+ cell abundance to be preferential in females. Males are designated as blue circles and females are designated as orange triangles. macs, Macrophages.