Society has been telling us for generations that once we hit the age of 40, it’s all downhill, including our ability to maintain healthy levels of fitness. Clearly, there are people around the globe who have thumbed their noses at this message and made it a mission to get into the best shape of their lives in their 40’s and beyond. There is no age limit on making your health and fitness a priority. When we are in our teens, 20’s, and even 30’s, we often fail to account for the aging process as we establish our diet and exercise routines during that first segment of our lives. But what…