Exercise is Important in Prevention

In 2000, President Bill Clinton dedicated March as National Colorectal Cancer Awareness Month. The purpose of this designation is to increase public awareness of the facts about colon cancer – a cancer that is preventable, treatable and has a high survival rate. Regular screening tests, expert medical care and a healthy lifestyle, which includes a proper diet and exercise, are essential for prevention. Several studies have demonstrated that exercise can also help prevent colon cancer. 

The American Cancer Society

The American Cancer Society estimates that there will be approximately 150,000 new cases of colorectal cancer in 2021. Of these, 52,980 men and women will succumb to the disease. It is the second-leading cause of U.S. cancer deaths for both men and women combined. The good news is incidence and mortality rates are dropping both nationally as well as in northeast Pennsylvania. The bad news is northeast Pennsylvania still has increased incidence and mortality rates when compared to the national average.

The Research

Studies show that prevention of this disease is multifaceted and includes: engaging in daily exercise, eating a low-fat diet with little red meat, avoiding smoking, drinking in moderation and having regular colonoscopy screenings.

Catch It Early

Early detection is the key to survival. Death from colorectal cancer can be eliminated if caught at the earliest signs of disease. Colorectal cancer progresses very slowly, usually over years. It often begins as non-cancerous polyps in the lining of the colon. In some cases, these polyps can grow and become cancerous, often without any symptoms. Some symptoms that may develop are: blood in stool, changes in bowel movement, feeling bloated, unexplained weight loss, feeling tired easily, abdominal pain or cramps, and vomiting. Contact your physician if you have any of these symptoms.

The risk of colon cancer increases with age, as 90 percent of those diagnosed are older than age 50. A family history of colon cancer increases risk. Also, those with benign polyps, inflammatory bowel disease, ulcerative colitis or Crohn’s disease are at greater risk and should be screened more frequently.

Prevention of Colon Cancer:

• Colonoscopy – The colonoscopy is the most accurate screening test for detecting polyps and colorectal cancer. A long, thin, flexible tube with a camera is used to visually examine the lining of the colon. Polyps can be removed at the time of the exam if necessary. Most people should have this test starting at age 50, although high-risk populations (i.e. those with genetic predisposition or inflammatory bowel disease) may begin at age 40 to 45 or even younger.
• Diet & Nutrition – Diets rich in fiber are generally considered beneficial for overall health, including colorectal health. Limit high-fat foods especially from animal sources. Limit red meat and dairy. A diet consisting of fish, fruit and vegetables is valuable. Some researchers theorize that Brussels sprouts, broccoli and cabbage may trigger a chemical process to turn on a gene to suppress tumors. Sunlight and vitamin D are thought to be important too. 
• Lifestyle & Personal Habits – Smoking and excessive alcohol use increases risk for colorectal cancer and other forms of cancer. Stress and anxiety can be cancer triggers
• Exercise – While there have been many studies about the benefits of exercise for colon cancer, none have been more encouraging than a recent study from the Hutchinson Cancer Institute in Seattle. Patients with abnormal cells on the lining of their colons, as found by colonoscopy, demonstrated positive changes and reversal of these cells after engaging in four hours of exercise per week for one year. Some studies have shown that exercise can reduce the risk of colon cancer by 50 percent.

How Exercise Prevents Colon Cancer:

The intestine works like a sewage plant, recycling the food and liquid needed by your body. However, it also stores waste prior to disposal. The longer the wastes remain idle in your colon or rectum, the more time toxins have to be absorbed from you waste into the surrounding tissues. One method in which exercise may help prevent colon cancer is to get your body moving, including your intestines. Exercise stimulates muscular contraction called peristalsis to promote movement of waste through your colon.

Exercise to prevent colon cancer does not have to be extreme. A simple increase in daily activity for 15 minutes, two times per day or 30 minutes, once per day is adequate to improve the movement of waste through your colon. This can be simply accomplished by walking, swimming, biking or playing golf, tennis or basketball. For those interested in a more traditional exercise regimen, perform aerobic exercise for 30-45 minutes four to five days per week, with additional sports and activities for the remainder of the time. For those in poor physical condition, begin slowly. Start walking for five to 10 minutes, two to three times per day. Then, add one to two minutes each week until you attain a 30-45 minute goal. 

Medical Contributor: Christopher A. Peters, M.D

Dr. Christopher Peters is a partner of Radiation Medicine Associates of Scranton (RAMAS) and serves as medical director of Northeast Radiation Oncology Centers (NROC). He is an associate professor of clinical medicine at GCSOM.

Sources: American Cancer Society/Northeast Regional Cancer Institute, and CA Cancer J Clin.

This article is not intended as a substitute for medical treatment.

If you have questions related to your medical condition, please contact your family physician.

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Paul J. Mackarey PT, DHSc, OCS is a Doctor in Health Sciences specializing in orthopaedic and sports physical therapy. Dr. Mackarey is in private practice and is an associate professor of clinical medicine at GCSOM.