Two men are stretching on mats after an exercise, relaxing in the sunshine. Have you ever finished a workout and thought: "I used to recover from this much faster." Maybe you can still walk, exercise, play golf, go to the gym, or enjoy a long hike. But now you notice something different. Your muscles stay sore longer. Your joints feel stiff the next morning. A workout that used to leave you tired for a few hours may now affect you for a day or two. For many people, this becom