 You're up for any adventure, climbing mountains, diving into deep blue waters, or trying that extreme sport you've always fantasized about. When we're young, we're fearless. Why? Because our bodies bounce back quickly. A scrape here, a sprain there, it's no big deal. Our bodies heal rapidly. Now let's fast forward to a more seasoned version of you. Would you still be as adventurous with your body? Probably not.