What is cancer?
Millions of cells within our body form our muscles, bones and organs. Each cell knows how to do its job, whatever task that may be.
Unfortunately, sometimes an anomaly occurs: a tumour (an abnormal growth of tissue) may form or spread through the blood or lymphatic system. Cancer, then, is a disease that starts in our cells.
Tumours can be either benign or malignant:
- Benign tumours stay in one place in the body and are not usually life-threatening.
- Malignant tumours can spread to other parts of the body. One of the first signs that a tumour has spread is the swelling of nearby lymph nodes.
Cancer can spread (or metastasize) to almost any part of the body. It is important to find and treat malignant tumours as early as possible.
Cancers are often named after the part of the body where they start.1
Will daily exercise prevent cancer?
Exercise is very good for you — it can even be a substitute for medication. But, at this time, there are no known cures for cancer. Not even exercise. However, there are studies that indicate that exercise may mitigate cancer risks.
Aside from exercise, there are other things you can do to reduce your risk, as there are many known risk factors for the disease. Smoking may be responsible for as many as 30% of all cancer deaths. As well, one-third of cancers can be linked to diet, obesity, and lack of exercise. 2
According to the Canadian Cancer Society, "About half of all cancers can be prevented through healthy living and policies that protect the public."
To help reduce your risk of developing cancer, the Canadian Cancer Society recommends that you consider these lifestyle choices:
- Choose a healthy lifestyle: diet and exercise.
- Be a non-smoker and avoid second-hand smoke.
- Keep a healthy body weight.
- Be active and eat well.
- Know the risks of alcohol. The less you drink, the more you reduce your risk.
- Protect your skin. Avoid long-time exposure in the sun, and don’t use tanning beds or lamps.
- Get enough vitamin D from the sun, supplements and your diet.
- Be aware. Look after yourself. Report any changes in your health to your doctor.
- Know your body and watch for signs of cancer.
- Get screened and help find cancer early.
- Check your family’s cancer history.
- Understand how hormones and infections affect your cancer risk.
- Get rid of harmful substances at work and at home.
How does exercise help — either before or after getting cancer?
A recent study from the National Cancer Institute seems to prove that exercise can be beneficial. 3
The final review and results of this study state:
- Physical activity is a critical component of energy balance, the term researchers use to describe how weight, diet, and physical activity influence health.
- There is strong evidence that physical activity is associated with reduced risk of cancers of the colon and breast.
- Several studies have also reported links between physical activity and reduced risk of endometrial (lining of the uterus), lung, and prostate cancers.
- Current National Cancer Institute-funded studies are exploring the role of physical activity in cancer survivorship and quality of life, cancer risk, and the needs of populations at increased risk.
What activities might help?
The answer to this comes down to your energy levels (especially if you are currently dealing with cancer and the side effects of treatment) and what kind of activities you enjoy doing. What you do is up to you, but you can choose from a variety of activities such as walking, fitness classes, swimming, or dancing.
There is no limit: Whatever you choose to do, make it simple, within your budget and your time parameters, but make it something that you can do regularly.
This article is part of a series about various health conditions and the benefits of exercise. The other articles are:
- Exercise and Allergies
- Exercise and Arthritis
- Exercise and Asthma
- Exercise and Balance
- Exercise and Chronic Pain
- Exercise and Circulation
- Exercise and COPD
- Exercise and Dementia
- Exercise and Diabetes
- Exercise and Heart Disease
- Exercise and Hypertension
- Exercise and Lifestyle and Older Adults: Recent Research
- Exercise and Mood
- Exercise and Osteoporosis
- Exercise and Our Brain
- Exercise and Pain vs. Burn: Will it ever stop hurting?
- Exercise and Parkinson's
- Exercise and Sleep
- Exercise and Stroke
- Exercise and Viruses: Exercise Immunology
I am a BCRPA-certified fitness instructor in Vancouver, BC. I teach four classes at the West End Community Centre in Vancouver, BC, mostly designed for the older adult. The Inevitable Disclaimer: Everything published here expresses only my opinion, based on my training and research. What you do with the information is entirely your own responsibility. I am not liable for any injury you suffer that seems to be related to anything you read here. Always consult your doctor before beginning an exercise program. For other articles, return to the table of contents.
Read more: http://www.cancer.ca/en/cancer-information/cancer-101/what-is-cancer/?region=bc#ixzz3HMmfXlTf ↩︎
The Canadian Cancer Society has an excellent web page (http://www.cancer.ca). Much of the information for this section came from their web page. ↩︎
For detailed information on this study, see http://www.cancer.gov/cancertopics/factsheet/prevention/physicalactivity. ↩︎