Proper nutrition is important at any age, but especially as you get older — and especially when you start to work out. There are some diet tips you might have followed when you were younger that are a really bad idea to follow now. Eat well by getting enough protein, carbohydrates and fats in your diet and eat a variety of foods with the vitamins and minerals you need. Make sure you eat something nutritious after you exercise, too, even if it’s just a snack. This helps your body replenish the nutrients and energy it just expended during your workout.