To me fitness is much easier to define. Fitness is a long life with minimal disease, chronic pain, or unhappiness. Jack Lalanne summed it up with longevity and quality of life. This isn't achieved only through exercising but daily physical activity plays a role in this view of fitness in a number of ways. Move your joints or they stiffen up. Raise your heart rate to improve heart health. Set and achieve physical goals to raise your self-esteem. Being able to accomplish physical feats can get you out of dangerous situations. A sound body contributes to a sound mind. This is the foundation of my view of fitness and will be the foundation for all my subsequent musings on physical exercise.