Actually a persons brain function, therefore coordination and relexes, are closely related to their enviroment. A lot of people today would see a major improvement by drop things like complex carbohydrates and caffeine from the diet, increasing daily activity and getting at least eight hours of sleep.
Not to be facetious... If you really want excercises to improve coordination and reflexes, those would be: Walking, running, weight lifting, swimming, bike riding, pilates... Take your pick.
