Fitness is to the body the equivalency of what fine-tuning is to an engine. It enables us to perform up to our full potential. Fitness is a condition that can help us look, feel, and do our best. It is the ability to perform normal given tasks quickly and alertly, with energy left over for enjoying leisure-time activities. It is the ability to endure and handle stress, to continue on in certain circumstances where a person who was not fit could not continue, and is a major basis for good or excellent health and well-being. ...