Study: Obesity Increases Breast Cancer Risk, Preventing Weight Gain Key

Postmenopausal women who are overweight — and especially obese — have a greater risk of developing breast cancers, finds a new study that highlights the importance of preventing weight gain, as it also raises questions about whether losing weight necessarily reduces that risk.

The study adds to a consistent body of research showing that overweight and obesity increases women’s risk of postmenopausal breast cancers. It was published yesterday in JAMA Oncology.

AICR estimates that a third of US breast cancers could be prevented if women were at a healthy weight throughout life, were active and did not drink alcohol.

In this study, as other research has seen, the heavier the women, the greater the risk. Women categorized as the most obese were at almost double the risk of the most common type of breast cancer, ER-positive, along with PR-positive tumors. These cancers are fueled by the hormones estrogen and progesterone, respectively.

The study used data from approximately 67,000 women who were all part of the Women’s Health Initiative trials. That study focused on preventing certain cancers, heart disease and osteoporosis. When the women entered the study in the mid 1990s they were 50 to 79 years old, and they were weighed. They also answered questions about their lifestyle habits, medical history and other health risk factors. After that, they were weighed annually and had regular mammograms. Continue reading

Keep that Fitbit On: Exercise Helps Prevent Cancer

If you’ve seen the recent headlines warning that physical activity won’t help you lose weight, you may be wondering if your evening walk or daily workout is worth the time.

The answer is a resounding YES – do take that evening walk, keep your pedometer on and get your exercise in whether you want to lose weight or not.

In the last few weeks, there’s been one article after another with experts arguing about what’s most important for weight loss – diet or exercise. But getting lost in all this discussion is the overwhelming evidence that physical activity provides many health benefits independent of weight loss, including lowering risk for at least three cancers – endometrial, colorectal and postmenopausal breast.being-physically-active-decreases-risk-of-these-cancers

There’s no argument that getting to and staying a healthy weight is also important for cancer. But this debate misses the mark when it comes to shaping your health. It is true that you “can’t outrun a bad diet,” as the author of a Washington Post article “Take off that Fitbit” says. It’s also true that for better health you need to do more than just cut calories.

For example, in that Post article, the author cites a study showing that diet only led to more weight loss than a diet and exercise group. What he didn’t point out is that while the diet only group lost slightly more weight, they also lost more muscle and bone mass than the diet and exercise group. This is especially critical because the study’s participants were 65 and older. Exercise helps you keep your muscle and strong bones at any age.

Apps, tracking devices and pedometers have also been singled out as not being the answer to weight loss. But losing weight takes a lot of work – it is hard to eat less – and you need all the support you can get to succeed. So while these devices aren’t the answer, studies do show that tracking your food and exercise is one key component to successful weight loss. You can also use a notebook, calendar or checklist, what matters is keeping track of your progress.

For more tips on eating smarter, learn about AICR’s New American Plate way of eating to lower cancer risk and lose weight healthfully.

New Study on Popular Diets: What’s Best for You

Perhaps you’ve struggled to find a diet that works for you, despite the almost overwhelming number of choices. And research seems to yield varying results. This is important because being a healthy weight can lower your risk for chronic diseases like type 2 diabetes and many cancers.Planning of diet.

A new study of popular diets in the Annals of Internal Medicine, completed a systematic review of controlled trials of popular diets and weight loss programs to look at their effectiveness at 12 months. These included Weight Watchers, Jenny Craig, Medifast, Atkins, SlimFast, eDiets and the LoseIt! app among others.

The authors concluded that Weight Watchers and Jenny Craig programs have the most robust evidence for people losing weight at one year when compared to doing nothing or simply getting general education about weight loss. They cited Nutrisystem as showing promise after a few months, but it lacks long-term results. These programs are all considered to be high intensity – meaning they include at least 12 individual or group counseling sessions. Continue reading