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  1. #1
    PENCILNECK Tatyana's Avatar
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    Default Birth Control Pills

    This is a topic that interests me, and I have been thinking about a way to start the topic.

    I was going to post the different types of pills with the differences between the various artificial oestrogens and progestins, and then I came across this article.

    I find this incredibly interesting, and I would love to get my hands on the presentation.

    Due to various circumstances and one set of my genes, I have rarely been on birth control pills. Despite some of the extra issues I have had to deal with due to alternate contraception, I have always considered not taking the pill to be a blessing in disguise.

    This is the icing on the cake.

    So how do most of you deal with issues of birth control?


    Want to get buff, ladies? Switch contraceptives

    The Pill may interfere with muscle-building workouts, study finds



    http://www.msnbc.msn.com/id/30266121/


    updated 1:15 p.m. ET April 17, 2009

    CHICAGO - Young women seeking a sculpted, muscular silhouette may want to avoid taking oral contraceptives, U.S. researchers said on Friday.
    They found women who were not taking birth control pills gained 60 percent more muscle mass after a 10-week weight training program than those who were.

    The study, led by Chang-Woock Lee and Steven Riechman of Texas A&M University in College Station and Mark Newman of the University of Pittsburgh in Pennsylvania, will be presented at the American Physiological Society meeting in New Orleans this weekend.

    The researchers studied 73 generally healthy women between 18 and 31 who completed a whole-body resistance exercise training program. About half took the pill and half did not.

    The women were encouraged to eat at least half a gram of protein per pound of body weight each day — about a third more than recommended by U.S. nutritional guidelines — to ensure they got enough protein and calories to build muscle.

    Both groups exercised three times a week under the supervision of exercise physiologists, performing the same number and intensity of exercises.

    At the end of the 10 weeks, the women who were not taking oral contraceptives had built significantly more lean muscle.

    And blood samples before and after the training period showed the women on the pill had lower levels of muscle-building hormones such as testosterone and far higher levels of muscle-breaking hormones such as cortisol.

    In a statement the team said that oral contraceptives appear to have a negative effect on women's ability to build lean muscle, but they added that future studies were needed to explain why.

  2. #2
    PENCILNECK Tatyana's Avatar
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    Default

    I would also like to know if anyone can remember something about one certain form of birth control pill that was not allowed for Olympic Athletes due to steroid regulations by the IOC and WADA.

    I think this was close to 20 years ago.

  3. #3
    RX MEMBER partsRheavy's Avatar
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    Default more from the BC research

    MedPageToday has an even better article extract. There's a video as well, so it's worth clicking the article -

    Ten weeks of resistance exercise training resulted in 40% less gain in lean mass among users of oral contraceptive pills than in nonusers, according to Chang Woock Lee of Texas A&M University, and colleagues.

    They reported their findings at a meeting of the American Physiological Society, a member of the Federation of American Societies for Experimental Biology.

    Researchers said that the results are particularly important because many high-performance athletes take birth control pills to control their menstrual cycles.

    The reduced muscle development in OC users was associated with significantly lower levels of androgenic hormones and insulin-like growth factor 1 (IGF-1), as well as elevated levels of the stress hormone cortisol.

    Moreover, gain in lean muscle mass differed according to the androgenicity of the progestin in an oral contraceptive (OC).
    "I think the implications are that so many women are taking BCP, and if they are active or competing, and want to achieve the highest level of performance, they need to consider whether birth control is a negative influence on that," said senior investigator Steven Riechman, Ph.D., also of Texas A&M.

    Several studies have demonstrated lower levels of the anabolic hormones dihydroepiandrosterone and its sulfate ester (DHEA/DHEAS) in women taking OCs.

    Bt the implications for active women and trained female athletes had not been studied extensively, said Dr. Riechman, noting that female athletes often use OCs to control their menstrual cycle.

    Investigators hypothesized that OC use would have a negative effect on muscle gains and on levels of anabolic hormones in active women. To test the hypothesis they studied 73 women ages 18 to 31. Of those, 34 took an OC and 39 did not.

    Both groups completed 10 weeks of whole-body resistance exercise training, consisting of 13 exercises performed three times a week. At each session, participants completed three sets of six to 10 repetitions of each exercise at 75% of maximum strength.

    Investigators determined body composition with hydrostatic weighing. The women provided blood samples at baseline and at the end of the study. Samples were assayed for DHEA, DHEAS, cortisol, and insulin-like growth factor-1 (IGF-1).

    OC users and nonusers were similar with respect to mean age (20 to 21), height (164 cm), weight (64 kg), body fat (26% to 27%), and body mass index (24). The two groups also reported a similar history of resistance exercise training.

    OC users had lower mean baseline concentration of DHEA (P=0.078), DHEAS (P=0.003), and IGF-1 (P=0.001), and a higher mean cortisol level (P<0.001).

    At the end of the study, OC users had gained significantly less muscle mass compared with nonusers (1 kg/2.1% versus 1.6 kg/3.5%, P=0.027/P=0.024). OC users also had significantly different laboratory values:

    ----DHEA, 9.5 versus 13.6 ng/mL (P=0.001)
    ----DHEAS, 1,451 versus 2,196 ng/mL (P=0.001)
    ----IGF-1, 163 versus 239 ng/mL (P=0.016)
    ----Cortisol, 33.4 versus 24.3 ng/mL (P=0.001)

    When the investigators analyzed lean-mass gain by type of OC, they found that users of OCs with low-androgenicity progestins had an average gain of 2.5% versus 0.5% for users of drugs containing medium- or high-androgenicity progestins (P<0.05).

    Gain in muscle mass did not differ significantly between users of low-androgenicity OCs and nonusers, but it was significantly lower in the medium-high androgenicity OCs compared with nonusers (P=0.024).

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