The brain's preferred source of fuel is glucose/carbohydrates. And when you go on a low-carb/high-protein diet, your brain is using low-octane fuel. You'll be a little groggy, a little grumpy.
Jack LaLanneFocus on your problem zones, your strength, your energy, your flexibility and all the rest.
Jack LaLanneDon't talk age! Age has nothing to do with it. One of my guys who started out at my gym is 87 now, and he still does ten bench-press reps with a hundred-pound dumbbell in each hand. He's training to set a leg-pressing record. I put things in the guy's brain way back when, and now he'll never get away from it.
Jack LaLanneStay in shape. And remember, daily exercise is a must. Plan for it, and do it. The rewards will be well worth it.
Jack LaLanne