Navigation Links
The Pill May Limit Muscle Gains in Women

But experts say results from the small study are no reason to stop birth control

FRIDAY, April 17 (HealthDay News) -- Lower hormone levels in women who exercise regularly and take birth-control pills may result in less muscle mass increases, a new study suggests.

But the muscle-mass differences between women taking "the pill" and those not taking the pill did not affect performance.

At this point, the finding, from a study scheduled for presentation Friday at the annual meeting of the American Physiological Society in New Orleans, is no reason to stop taking oral contraceptives, experts said.

"It is premature to say anything conclusively at this point," said study lead author Chang Woock Lee, a doctoral candidate in the department of health and kinesiology at Texas A&M University, College Station. "Vigorous future studies with more stringent control and clever design will be definitely needed to confirm the results and/or elucidate the underlying mechanism conclusively."

Others agreed.

"It's just one small, a very small, group of women. If you think of how many women actually are on the pill, how significant is the difference in terms of patients noticing anything or even an actual health effect?" said Dr. Jennifer Wu, an obstetrician/gynecologist at Lenox Hill Hospital in New York City. "This might make a difference for a high-performance athlete in a competition, but, for your normal patients who have a healthy exercise routine, this might not make a difference."

"I don't disagree with the statistical significance, but the clinical significance is very questionable," added Dr. Amanda Weiss-Kelly, director of pediatric sports medicine at Rainbow Babies & Children's Hospital, part of University Hospitals Case Medical Center in Cincinnati. "The difference didn't translate into improvement in performance," she added.

There is some existing research into the effect of oral contraceptives on body composition, Weiss-Kelly said, but most studies have been small, and results have been conflicting.

The authors of the new research studied two groups of 18- to 31-year-old women: 34 who were on the pill and 39 not on the pill. All were active and healthy and took part in a 10-week resistance-exercising training program (three times a week) as well as analysis of their body composition both before and after the program.

Women not taking oral contraceptives gained more than 60 percent more muscle mass than those on the pill.

There were other changes noted in participants on the pill, including reduced concentrations of the hormone DHEA, which Lee explained, is an anabolic hormone and therefore builds muscle.

But some of these changes would be expected in women taking contraceptives, Weiss-Kelly said.

More information

The U.S. National Women's Health Resource Center has more on birth-control pills.

SOURCES: Chang Woock Lee, doctoral student, Department of Health and Kinesiology, Texas A&M University, College Station; Jennifer Wu, M.D., obstetrician/gynecologist, Lenox Hill Hospital, New York City; Amanda Weiss-Kelly, M.D., director, pediatric sports medicine, Rainbow Babies and Children's Hospital, University Hospitals Case Medical Center, Cincinnati; April 17, 2009, presentation, annual meeting of the American Physiological Society, New Orleans

Copyright©2009 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Helen of Troy Limited Announces Closing of Global Infusium Brand Acquisition From Procter & Gamble
2. Drug-Coated Sponges May Limit Catheter Infections
3. Non-safety-related voluntary market withdrawal of a limited portion of DAYTRANA(R) (methylphenidate transdermal system) patches announced
4. When Time is Limited, Internet is the Number One Support Tool for Caregivers
5. Irelands Allergy Standards Limited Adds Two New U.S. Names to Line-Up of Companies Making Allergy-Certified Consumer Products
6. Limited resources, unlimited needs: Americans should ration health care, says MSU ethicist
7. Supreme Court Rejects Limits on Drug-Injury Lawsuits
8. Association for Healthcare Philanthropy Opposes Limits on Charitable Tax Deductions
9. Study sheds light on angiogenesis inhibitors, points to limitations, solutions
10. Press Statement Issued by Ranbaxy Laboratories Limited
11. Experts Urge Limits on Use of Cardiac CT Scans
Post Your Comments:
(Date:10/12/2017)... Francisco, CA (PRWEB) , ... October 12, 2017 ... ... Dr. Cheng, are now treating sleep apnea using cutting-edge Oventus O2Vent ... apnea, a serious sleep disorder characterized by frequent cessation in breathing. Oral appliances ...
(Date:10/12/2017)... ... October 12, 2017 , ... The company ... of today’s consumer and regulatory authorities worldwide. From Children’s to Adults 50+, every ... meet the highest standard. , These products are also: Gluten Free, Non-GMO, ...
(Date:10/12/2017)... ... 2017 , ... The American College of Medical Informatics (ACMI) will present the ... Opening Session of AMIA’s Annual Symposium in Washington, D.C. AMIA’s Annual Symposium ... a pioneer in the field of medical informatics, this prestigious award is presented to ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... that we intend to develop to enable prevention of a major side effect ... hearing loss, especially in pediatric patients. For cisplatin, hearing loss is FDA listed ...
(Date:10/12/2017)... ... 2017 , ... HMP , a leader in healthcare events and education, today ... Digital Award for ‘Best B-to-B Healthcare Website.’ Winners were announced during the Eddie & ... award competition recognizes editorial and design excellence across a range of sectors. This year’s ...
Breaking Medicine News(10 mins):
(Date:9/19/2017)... a venture-backed medical device company developing a non-invasive, robotically assisted, platform therapy that uses pulsed ...   ... Jim Bertolina, ... Tom Tefft ... medical device executive Josh Stopek , PhD, who has led R&D and business development ...
(Date:9/18/2017)... , Sept. 18, 2017 ... fields of bioinformatics and immune engineering, today ... protective avian influenza A (H7N9) vaccine. ... related to seasonal influenza and presents a ... on prior exposure to be effective. Using ...
(Date:9/12/2017)... -- Consumer reviews on the independent review site Consumer Affairs ... for hearing aids, ranking it higher than Miracle Ear ™, ... ... Hearing Aids ... store that provides high performance, state-of-the-art, German-engineered hearing aids directly to ...
Breaking Medicine Technology: