Fig 2.

A short-term aerobic exercise intervention improves skin structure and increases tissue mitochondria. (A) Stratum corneum thickness, (B) stratum spinosum thickness (C) reticular dermis collagen content, and (D) mtDNA copy number in skin samples acquired before (Pre) and after 3 months of aerobic exercise training (Post) in previously sedentary elderly (65–86 year) adults. Data are mean ± SE. n = 10. Pre/post-training comparisons were made using a paired t-test. *indicates a significant (P < 0.05) difference from the indicated group(s).