Is the amount of time spent for physical activity linked to academic success?

Seminar paper from the year 2003 in the subject Business economics - Miscellaneous, grade: A, California State University, East Bay (-), course: Research Methods and Communication, language: English, abstract: Throughout my life I heard the famous phrase 'healthy body, healthy mind.' At least in Germany this phrase is quite common. But is there really a relationship, or do people just say it? In this context some might argue that being physical active does not contribute to the overall heal...