One common thread woven into overall cancer prevention and survival is this -- exercise.

One hour of daily vigorous exercise -- or two hours of less strenuous activity -- is now linked to a lower risk of colon cancer, according to the results of a recent study.

Jogging, pumping iron, swimming, and even housecleaning can do the trick, as demonstrated by research conducted with 413,000 people in 10 European countries.

Of those studied, people with the highest level of exercise were 22 percent less likely to develop cancer and 35 percent less likely to develop tumors on the right side of the colon. Those of normal weight enjoyed a greater benefit, but exercise was also beneficial for the overweight and obese. Exercise did not have a protective effect against rectal cancer.

This research -- helping to support the fact that about 70 percent of colon cancer cases can be prevented by changes in diet and exercise -- is significant because of the large sample size and the different levels of activity observed across the borders.

Colon and rectal are among the most common cancers in developed countries. More than 940,000 cases are diagnosed each year. About 492,000 people die from the illness.

Caregivers are quiet heroes, helping and caring without asking for anything in return. Caregivers step in when there is a need and they bring with them a sense of hope and comfort during the challenges facing a loved one diagnosed with cancer. In the selflessness of love, they sometimes forget to take time to care for themselves. To avoid caregiver depression, frustration, resentment, illness and burnout, here are six ways a cancer caregiver can care for themselves while caring for someone else:

Take a daily walk. Exercise is a great stress reducer. Taking the time to stroll through the neighborhood or local park is like a deep calming breath for the body and emotions. If you are a jogger, go jogging. The point is to get away for a moment, get the body moving, and enjoy a change of scenery as you go.

Keep a journal. Daily journaling is a way to outwardly express your thoughts and emotions and can act as a relief value for emotions that are building up inside. It can also give you a better perspective. Sometimes we need to see what we are thinking and feeling to sort it all out.

Pursue personal interests. If you have a hobby or activity -- like writing poetry, photography, crafts, painting, knitting, reading, gardening, or listening to music, that has always been fun and brought you a sense of joy and contentment -- make time each day for your personal pleasurable pursuits.

Maintain friendships. We need our connection to others for the enjoyment of company and for comfort and support. Make regular weekly dates with friends and meet for coffee. Join a book club or start a book club. If there is a caregiver support group in your area, or a support group for families affected by cancer, consider joining.

Learn ways to relax. Try breathing exercises and muscle relaxation exercises. Schedule a massage. Take a weekly yoga or tai chi class. Cannot get away? Pop in a yoga or tai chi video and follow along.

Make your health a priority. Eat well-balanced meals, get plenty of rest, drink plenty of fluids. Find inspirational quotes that lift your spirits and display them where you can read them each day. Remember to laugh each day. Hug and be hugged.

To offer the very best care for your loved one, you must take care of yourself too. It's not selfish, it's wise.

If you are a caregiver that has found unique fun ways to take a moment to take care of yourself while taking care of someone you love, please share your ideas with other caregivers in the comment area following this post. If you are a reader with fun tips or ideas on ways a caregiver can take care of themselves while caring for someone else, please share in the comment area. We are all in this together, and we will get through the challenges and struggles of cancer much better with each other's support and encouragement.

Sunscreen products containing Mexoryl SX or ecamsule, an ingredient designed to block the sun's harmful UVA rays, have been sold in Canada and Europe for over ten years, but have not been available here.

The Food and Drug Administration (FDA) has recently approved the over-the-counter sale of L'Oreal Anthelios SX sunscreen product containing ecamsule to consumers in the US.

While UVB rays are known to cause sunburn, UVA rays penetrate deeper into the skin and are associated with an increased risk for basal and squamous cell cancers and melanoma skin cancer. Anthelios SX is made by the French cosmetics company L'Oreal. Mexoryl SX is owned by L'Oreal, and is only available in L'Oreal products.

Sunscreens might provide some protection from the harmful rays of the sun, and should be used when going out in the sun. Still your best bet is to shade yourself when spending any length of time in the sun and staying out of the sun during the peak hours of 10 AM to 4 PM when sun can cause the most skin damage.

I have tried to exercise most of my adult life -- at times because I felt obligated to participate in what I knew was good for me and at times to justify eating my favorite foods while maintaining an appropriate weight and at times because I wanted to actually have a toned, healthy body.

At this exact time in my life, I exercise with all of these motivations in mind -- plus a few more. I like to sweat and know I am accomplishing a physical feat. I like the mental release I get when I push my body to perform. I like the time to myself, the loud music I hear on my MP3 player, and the results I see from a little bit of hard work. And lately -- as a result of a new weight training program -- I know I am benefiting my body more than ever before.

The following are just seven of the many gifts that come from weight training. Gifts that will make me a happier, healthier cancer survivor.

Noticeable physical results -- Mostly, walking and occasional jogging have been my methods of exercise. And I've seen results from this type of workout -- leaner legs, more defined calf muscles, and the knowledge that I am increasing my cardiovascular health, as confirmed by the technician who performed an ultrasound on my heart in preparation for my Herceptin treatment for breast cancer. He told me he could tell I exercised regularly because of my low resting heart rate. But until I started weight training a few months ago, I never witnessed quick results. Yet after a few weeks of resistance exercise -- lifting 20-pound weights for my arms, shoulders, back, and chest -- I could see definition and tone that clearly would not have resulted from my purely cardio workouts.

Improved strength and endurance -- Lunges and squats and jumping with resistance bands have strengthened my legs. Lifting weights has strengthened my arms -- and I can now lift heavier weights than when I first started my new routine. I can do more push-ups now too -- not girl push-ups on my knees but real push-ups -- than I ever could have imagined doing when I could barely lower my own body weight and would crash to the floor on my stomach. My strength has improved. My endurance has improved. I feel more powerful.

Increased energy -- Fatigue (or maybe it's laziness) sometimes prevents me from happily jumping up to begin exercising. But when I push myself and exert myself and get lost in my exercise routine, my energy returns -- and not just during my workout but for some time afterwards too. Some say energy increases from strength training because it contributes to loss of fat which means we have less to lug around each day.

Burning of more calories -- Weight training raises basal metabolism which causes more calorie burning over a 24-hour period of time. Calories even burn during sleep as a result of weight training.  For every additional pound of muscle you gain, your body burns 50 extra calories every day -- 50 more calories than the few hundred that might burn from aerobic exercise. Research shows that regular resistance training can increase your Basal Metabolic Rate by 15%. So for someone who burns 2000 calories per day, that's upwards of 300 extra calories burned every single day. 

Decreased onset of illness -- Weight training can reduce the risk of adult onset diabetes and the risk for developing colon cancer and can improve the functioning of the immune system and the efficiency of the heart. It decreases the risk of low-back injuries, decreases resting blood pressure, increases good cholesterol (HDL), and improves posture. The list goes on -- and so does healthy living if weight training becomes a way of life. As a young person already having experienced a life-threatening illness, this comforts me.

Prevention of osteoporosis -- My recent bone density test revealed that I am not at this moment at risk for developing osteoporosis. I don't want this to change. Strength training can help me maintain this status because it can significantly increase bone mineral density -- which is important because we naturally lose bone density as we age. Strength training helps protect against osteoporosis. And age should not be a deterrent. Individuals who begin training late in life -- at age 65, for example -- can restore bone loss.

Improved outlook on life -- As a result of toning and shaping my body, burning calories, enjoying greater strength and energy, and working toward a disease-free future, weight training gives me an improved outlook on life. And weight training has recently been reported to significantly improve the quality of life of women recently treated for breast cancer. A May 2006 study indicates six months of twice weekly exercise was enough to improve the overall physical and emotional condition of patients.

Twice weekly is my weight training goal. I will continue to walk and run -- and bike on occasion too -- but strength training will be my priority. Because health is a priority.

I am fairly certain each one of us knows by now that exercise is good for a body that was designed to move in order to function at top efficiency and maintain health. Extolling the virtues of exercise is in the news almost daily now. There are organizations devoted to raising awareness about the benefits of exercise. Our government has launched programs to get people up and moving. There is a huge commercial industry built around exercise. Exercise is one of the single best ways to reduce risk of many diseases, including cancer. Common sense might be enough to support the message about the benefits of exercise, but it is interesting to know why it works as well as it does -- and that it isn't just the latest lifestyle fad of the decade.

Australian researchers report that exercise promotes an increase in a protein that blocks cancerous cell growth and induces cancerous cell death. The beneficial protein, IGFBP-3, that increases with exercise, blocks a different protein, IGF-1, from stimulating cancerous cell growth and forming new blood vessels that feed tumors. So the next time we are deciding whether or not to take that walk or run -- as the couch is beckoning us to sit and rest a spell -- just imagine we might be deciding which team of proteins we want to help do its job. In the fight against cancer and for cancer prevention, it's enough to make a body move.