Fitness is a lifelong pursuit, but it can mean different things at different times in your life. When I was younger, I was a competitive powerlifter and bodybuilder. Training meant that I was going to physically push my body to it's limits almost every time I walked into the gym.
Today, training is very different. I don't train for competition and I'm not looking to lift obscene amounts of weight. Instead, I train to feel better, prevent injury, and to be healthier. The aesthetic benefits of looking strong and muscular are side benefits.
That means that, while I keep my training challenging, it's not the knock down drag out fight that it once was. In this way, training supports the rest of my life goals of being a good business man, a good partner, and a good leader.
Additionally, training keeps me mentally clear and allows me to feel my best no matter what's going on in my life.