In this day and age I think exercise is even more important, and strength training is the best kind in my opinion. Society pushes pleasure in every form now, and there's way more chemicals and poisons in our environment, food, water and air than decades or centuries ago, when men worked physically all day instead of sitting in a car and cubicle getting fat. My wife and I are 60 and have strength trained most of our adult lives, and it shows in our physical and mental health. Nearly everyone on both sides of our extended family, including the young nieces & nephews, is obese or sick with some metabolic lifestyle disease. ADD/ADHD is everywhere. Nobody's outside doing yardwork or getting fresh air and sunshine. We're the only ones we know who aren't sick and have the energy to work outdoors all day after a full work week. We're not vain bodybuilders either, just normal people who eat healthy: meat, veggies, water, coffee, juice, occasional wine. We keep the fasts and eating vegetarian a couple days a week is no problem at all. It hasn't touched our strength. We are never ever sick. The kingdom of heaven is within you. God bless you all. The other comments quoting scripture are on point. Pay attention.