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Breast Cancer Weightlifting
Mel Evans  /  AP
Joann Agoglia, the wellness director for the YMCA of Burlington County, New Jersey,  helps cancer survivor Gay McArthur of Smithville, N.J., with a weight lifting exercise program in Mount Laurel, N.J.
updated 8/12/2009 6:44:52 PM ET 2009-08-12T22:44:52

For decades, many doctors warned that lifting weights or even heavy groceries could cause painful arm swelling. New research shows that weight training actually helps prevent this problem.

"How many generations of women have been told to avoid lifting heavy objects?" Dr. Eric Winer, breast cancer chief at the Dana-Farber Cancer Center in Boston, lamented after seeing the surprising results of the new study. "Women who were doing the lifting actually had fewer arm problems because they had better muscle tone."

The study was led by Kathryn Schmitz, an exercise scientist at the University of Pennsylvania, and funded by the federal government. Results are in Thursday's New England Journal of Medicine.

More than 2.4 million Americans are breast cancer survivors, and the study could mean a big difference in their quality of life. Cancer treatment-related arm swelling now appears to be one of many ailments made better by exercise — not worse, Schmitz said.

Well-meaning (but wrong) advice
"Fifty years ago we told people who had a heart attack not to exercise anymore," and people with sore backs to heal with bed rest, Schmitz said. "It was well-meaning advice but it was polar opposite of the truth." Are you at risk for breast cancer?

Women who have had radiation to the armpit, or lymph nodes removed to check for cancer, can suffer lymphedema — a buildup of fluids that causes painful and unsightly swelling of the arms or hands.

To avoid it, doctors have advised women to avoid using the affected arm to lift toddlers, carry a heavy purse or scrub floors. Even activities like golf and tennis raised concern.

Women think, "Oh, my God, I need to baby the arm," Schmitz said.

Lifting weights — which boosts mood, muscle mass, bone strength and weight control — was thought to be a bad idea for women prone to lymphedema.

Schmitz challenged that notion with a small study several years ago, finding that weight training did not make lymphedema worse. Her new study is the first one large and long enough to give clear proof that this is so, and even suggests that weight lifting can help.

It involved 141 breast cancer survivors who had suffered lymphedema. Half were told not to change their exercise habits. The rest were given 90-minute weightlifting classes twice a week for 13 weeks at community gyms, mostly YMCAs.

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They wore a custom-fitted compression garment on the affected arm and gradually worked up to more challenging weights and repetitions. For the next 39 weeks, they continued these exercises on their own.

The women's arms were measured monthly. After one year, fewer weightlifters had suffered lymphedema flare-ups — 14 percent versus 29 percent of the others. Weightlifters reported fewer symptoms and greater strength. Rates of change in arm size due to swelling were similar in both groups.

"I found it was really very effective. It not only gave me strength and mobility but it improved my balance and coordination," said one participant, Clare Faber, 66, of suburban Philadelphia. "It really does offer women hope."

Another participant, Gay McArthur, 56, of Smithfield, N.J., has continued weightlifting on her own since the study ended.

"When I first got diagnosed with lymphedema, they said I couldn't lift more than five pounds," she said. But weight training caused no problems and has made her feel better, she said.

It also should save money, though the study did not measure this, Wendy Demark-Wahnefried, of the University of Texas M.D. Anderson Cancer Center in Houston, wrote in an editorial in the medical journal. In the study, the group of weightlifters made only 77 visits to doctors or physical therapists for lymphedema flare-ups versus 195 visits for the others, she noted.

Another part of the study is evaluating whether weight training can prevent a first case of lymphedema in breast cancer survivors; results are expected soon, Schmitz said.

Breast cancer survivors should not rush into weight training — that could trigger problems. Schmitz suggests:

  • Have a certified fitness professional teach you how to do the exercises properly.
  • Start slow, with a program that gradually progresses.
  • Wear a well-fitting compression garment during workouts.

© 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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