Keeping yourself physically fit can help keep you emotionally and psychologically fit as well. When you're staying on top of your physical health you might notice that you're mentally clear, more creative, more resilient when faced with stress, and even happier. Yet, when you're not eating well, leaving exercise for the end of the month (or not exercising at all), ignoring aches and pains, and avoiding going to the doctor when not feeling well, you might notice that your levels of stress and irritability are higher.