Health Education Materials With/Out a Physical Activity Program for Patients Who Have Undergone Treatment for High-Risk Stage II or Stage III Colon Cancer

RATIONALE: Participating in a physical activity program designed to increase free time physical activity and receiving written health education materials may influence the chance of cancer recurring as well as impact on physical fitness, psychological well-being and the quality of life of patients who have undergone surgery and chemotherapy for colon cancer. It is not yet known whether giving a physical activity program together with health education materials is more effective than giving health education materials alone for patients who have undergone colon cancer treatment. PURPOSE: This randomized phase III trial is studying a physical activity program given together with health education materials to see how well it works compared with giving health education materials alone for patients who have undergone treatment for high-risk stage II or stage III colon cancer.