I have been curious about this for a long time now. Our bodies gradually grow stronger as an adaptation to the stress imposed on them, examples of this can be seen at any gym or training facility. As our bodies repair the damage from this stress they adapt to become stronger to alive the stress caused by these outside forces. The concept of an increased "healing factor" seems to apply to all facets of the individuals body; including all things such as immune system and skeletal muscle. My question is this:
With a character such as dead pool or wolverine, where their healing factor is so fast they can instantly recover from such serious wounds as a gun shot or laceration, has there ever been an instance where force was applied(possibly from a stronger enemy) and their muscles showed this concept and they grew stronger to meet the challenge?
I have seen in more serious injuries that the strands of muscle have been repaired almost instantaneously from injury, but have always wondered why the other end of this adaptation was never(to my knowledge) shown in comics. It would make an interesting twists on some of the classic match ups though comics and I would love to see a character such as Death-stroke using this to its full potential.