Exercising makes wounds heal faster

At least according to this study. It is a pretty straight forward look at wound size in a sedentary versus exercise group of mice. The exercise did not have a statistically significant effect on wound healing in young mice, but did in older mice. TNF alpha, monocyte chemoattractant, and keratinocyte chemoattractant were all decreased with exercise. These mainly cause inflammation at the wound site. From this data, it can be inferred that exercising reduces inflammation in the skin, which speeds up wound healing in mice. We'll see how this translates to humans, but it's an interesting study overall.