Physical activity reduces the risk of colon cancer recurrence and improves survival

A new international study shows that regular exercise can significantly improve survival rates for patients treated for colon cancer. The exercise program lasted three years and reduced the number of relapses and overall mortality. Experts are urging that exercise should become a standard part of cancer care.

Scientists from Canada, Australia, the UK, Israel and the US conducted a unique three-year study involving 889 patients with curable colon cancer who had completed chemotherapy. Some of them received a brochure with advice on a healthy lifestyle, while the other group participated in a training program led by trainers.

Patients worked with a trainer, meeting every two weeks for the first year and then monthly for the next two years. The trainers helped them find comfortable and effective activities, such as walking around their neighborhood. For example, Terri Swain-Collins, 62, decided to walk for about 45 minutes several times a week.

After eight years, the exercise group was more active, had 28 percent fewer cancer recurrences, and 37 percent fewer deaths from all causes than the control group. However, the group also had more minor muscle injuries, which is normal with increased physical activity.

Dr. Jeffrey Meyerhardt of Dana-Farber Cancer Institute called the study “extremely exciting,” noting that it was the first randomized trial to confirm the benefits of exercise for patients with colon cancer. Dr. Julie Gralow of the American Society of Clinical Oncology added that the study provides the highest-quality evidence on the positive effects of exercise.

Dr. Christopher Booth, a co-author of the study, emphasized that exercise programs are an “extremely affordable intervention” that could be introduced as standard care. Researchers will continue to investigate exactly how exercise helps fight cancer — whether through improved immunity, insulin regulation, or other mechanisms.

According to Kerry Courtney of the University of Alberta, the success of such a program depends on belief in its benefits, finding an enjoyable form of activity and social support. Patients like Terri Swain-Collins continue to exercise after the program ends, which has a positive impact on their health and well-being.