Mental fitness is a lifelong journey — nurture your brain at every age. Mental Fitness Training 1-Minute Summary Mental fitness is just as essential as physical health, no matter your age. The 5 key rules are: mindfulness, lifelong learning, strong social ties, daily physical activity, and goal setting. Each rule can be tailored to children, teens, adults, and seniors. Adding brain-boosting routines to your day can dramatically improve well-being and clarity. Think of this as