Kata training in Shotokan karate is done in order to help the body maintain a sense of balance and flexibility, and the constant repetition of the kata engages the mind too! Try repeating the same technique twenty times and see how often the mind wanders from the task at hand; you might be surprised at how often it will, and how difficult it can be to remain on target and complete the challenge. Over time, the practice of  karate keeps the mind sharp, develops healthy breathing patterns and physical flexibility in those over sixty. However, as beneficial as Shotokan karate may be, it is of little use if you fail to take a similar approach to your life outside the dojo. Smoking, overeating, or the excessive consumption of alcohol will undo any positive characteristics of training and may perhaps negate them altogether.