News and Document archive source
copyrighted material disclaimer at bottom of page

NewsMinenature-healthhealthcancer — Viewing Item

Breast cancer risk reduced by exercise

Original Source Link: (May no longer be active)

Breast cancer risk reduced by exercise
By Rita Rubin, USA TODAY
Postmenopausal women can reduce their risk of breast cancer simply by taking a brisk, half-hour walk five days a week, according to a study out Wednesday.
"It's not too late to start exercising," says lead author Anne McTiernan, an internist and epidemiologist at Fred Hutchinson Cancer Research Center in Seattle.

McTiernan's team studied nearly 75,000 volunteers, ages 50 to 79, in the government-sponsored Women's Health Initiative, or WHI. The WHI is best known for reporting in July 2002 that the risks of estrogen plus progestin outweigh the benefits. That conclusion arose from a study in which women were assigned to take either hormones or placebo pills.

The new findings, in the Journal of the American Medical Association, come from the WHI's observational study, in which participants decided on their own whether to go on hormone therapy or not. Researchers are following the women over time to identify factors, such as exercise, that predict disease development. At the start of the study, all of the women were healthy and about half were on hormones.

Researchers asked the women whether they exercised hard enough to break a sweat and speed up their heartbeat at least three times a week. The scientists were interested in the women's current exercise habits as well as at three specific, earlier ages: 18, 35 and 50.

Over a follow-up period of nearly five years, 1,780 participants were diagnosed with breast cancer. Women's current exercise habits had the biggest effect on breast cancer risk, followed closely by their habits at age 35. Overall, women who currently walked briskly or engaged in similarly strenuous exercise for 1&frac_one_quarter; to 2 hours a week were 18% less likely to develop breast cancer than women who were currently sedentary. Women who had engaged regularly in strenuous exercise at age 35 had a 14% lower risk than women who were sedentary at that age. Exercise habits at age 18 or age 50 had only a marginal effect.

The effect of exercise was most pronounced in underweight women but was also seen in normal weight or somewhat overweight women. Doing the equivalent of 10 hours of brisk walking each week cut breast cancer risk by more than 30% in those women.

But researchers did not find a benefit in obese women. Other studies have suggested that obese women tend to over-report how much they exercise, McTiernan says. "That's not something we could prove," she says, adding that the finding was not an excuse for obese women to forego exercise.

Scientists speculate that exercise protects against breast cancer by lowering body weight. They believe that fatty tissue produces hormones and growth factors, such as estrogen and insulin, that may promote tumor growth.

The new study "provides further evidence that no pain, no gain is an outdated notion," says WHI scientist JoAnn Manson, chief of preventive medicine at Boston's Brigham and Women's Hospital. "You don't need to exercise strenuously and for very long durations in order to reap health benefits," says Manson, who was not a co-author on McTiernan's paper.

The best exercise, McTiernan says, is one you'll stick with.

1mil new skin cancer { May 27 2003 }
20 cancer fighting foods to eat all summer
African american women higher breast cancer { December 7 2003 }
All types of alcohol raise cancer risk
Antibiotic use causes cancer
Asians get cancer when in america
Asians low cancer rate
Beta carotene supplements
Blacks more likely die cancer
Breast cancer link to use of antibiotics
Breast cancer risk reduced by exercise
Broccoli helps prevent cancer { April 20 2005 }
California sues mcdonalds and potato chips over cancer
Cancer broccoli { May 28 2002 }
Cancer causing drug found in british poultry { October 21 2004 }
Cancer causing pesticides living in our bodies { June 21 2005 }
Cancer deaths decline first time since 1930 { February 9 2006 }
Cancer french fries { July 3 2002 }
Car exhausts may cause child cancer
Carbohydrates could be linked to breast cancer { August 9 2004 }
Carcinogen sealed glass jar foods
Carrots help cut cancer risk
Curry fights cancer
Curry fights prostate cancer study says { January 17 2006 }
Curry shuts down melanoma cancer tumors
Diet alcohol linked to one third cancer cases { May 20 2004 }
Diet and tobacco account for most cancer
Diet responsible for half cancers says fox files [wav]
Doctor in africa discovers western diet is cancerous { February 28 1911 }
Eating red meat increases risk of colon cancer
Eu beef cancer { May 4 1999 }
Fatty diet linked to cancer { March 21 2007 }
Garlic wards off cancer
Good night sleep fights cancer
Green tea cuts risk of cancer
Green tea reduces risk prostate cancer
Hair dyes linked to kind of cancer { January 24 2004 }
High fat diet increases breast cancer risk
High fat linked breast cancer { July 18 2003 }
High fiber reduces colon cancer { May 2 2003 }
High sugar diet linked to cancer { March 21 2007 }
Hormones in milk are linked to cancer
Meat and alcohol cause breast cancer
Meats and sweets boost cancer risk { July 10 2007 }
Microwaving plastic causes cancer in foods
Milk cause of cancer
Miso soup cuts breast cancer { June 18 2003 }
More causes cancer
Natural solutions for estrogen
New study says sun screen ineffective { June 15 2006 }
Nonfat milk linked to prostate cancer
Obesity linked to cancer { January 9 2006 }
One third cancer caused by diet
Pill linked to cancer { April 3 2003 }
Processed meats raise risk of cancer
Prostate testing debate
Red meat cancer { April 30 1996 }
Red meat diets cause cancer { April 7 2004 }
Red meat fuels bowel cancer risk { June 15 2005 }
Redheads risk of skin cancer without burns { August 29 2005 }
Regular aspirin use linked to cancer cases { January 9 2004 }
Study links breast cancer to antibiotic use { February 16 2004 }
Sun exposure may aid skin cancer victims { February 2 2005 }
Sunlight vit d prevents breast colon lung prostate cancer
Sunscreen blamed skin cancer
Sunscreens fails to prevent free radicals
Sunshine helps fight against breast cancer { August 4 2007 }
Sunshine may protect prostate from cancer { June 15 2005 }
Tea may fight ovarian cancer
Toxin in pet food eaten by chickens fed to people { May 4 2007 }
Toxins in the kitchen { May 4 2007 }
Vegetables and soy combats cancer
Vegetarian diet helps man fight cancer { June 7 2007 }
Vitamins tied to prostate cancer
Western asians higher cancer than eastern { June 1 2001 }
White wine increase risk of cancer
Women double risk for lung cancer { December 2 2003 }
Women plagued by lung cancer

Files Listed: 78


CIA FOIA Archive

National Security
Support one-state solution for Israel and Palestine Tea Party bumper stickers JFK for Dummies, The Assassination made simple