SHBG, Plasma, And Urinary Androgens In Weight Lifters After A Strength Training

Discussion in 'Scientific Studies' started by Drareg, Nov 20, 2016.

  1. Drareg

    Drareg Member

    Joined:
    Feb 18, 2016
    Messages:
    2,294
    Gender:
    Male
    "Previous studies with different results have suggested that total and bioavailable testosterone levels are modified by physical exercise. Such changes may be related to modifications in cortisol levels and could be reflected in some urine androgens. To determine how weight lifting training may affect serum and urinary androgens, we measured total serum testosterone (T), cortisol, sex hormone binding globulin (SHBG) and urinary testosterone, epitestosterone, androsterone, and etiocholanolone, in a group of 19 elite weight lifters after 20 weeks of training. SHBG increased (from 27.5 +/- 9.5 to 34.7 +/- 8.1 nM, p < 0.05) whereas T/SHBGdecreased significantly (from 1.10 +/- 0.4 to 0.85 +/- 0.3, p < 0.05). Serum total testosterone and cortisol did not change significantly. In urine, androsterone and etiocholanolone decreased significantly, whereas testosterone and epitestosterone remained unchanged. Changes in T/SHBG were related positively with changes in urinary androgens (r = 0.680, p < 0.01), and changes in SHBG were negatively related with changes in urinary androgens (r = -0.578, p < 0.01). These results suggest that intense physical activity may have an influence on the elimination of androgenic hormones due mainly to changes in their transporting protein SHBG."
     
  2. paymanz

    paymanz Member

    Joined:
    Jan 6, 2015
    Messages:
    2,658
    Gender:
    Male
    How is it possible,it always been shown that weight lifting increases testosterone levels.
     
  3. Koveras

    Koveras Member

    Joined:
    Dec 17, 2015
    Messages:
    719
    Gender:
    Male
    Probably the difference between untrained or moderately trained individuals and elite weightlifters.
     
  4. Constatine

    Constatine Member

    Joined:
    Sep 28, 2016
    Messages:
    1,777
    Gender:
    Male
    I think the answer is quite simple. Lifting increases tissue androgens, not blood androgens. For this reason I don't think people understand how much lifting really increases your testosterone levels. I mean just look at every gym guy ever, they have muscles yes, but they also have broad shoulders, jaws, full beards, etc.
     
  5. paymanz

    paymanz Member

    Joined:
    Jan 6, 2015
    Messages:
    2,658
    Gender:
    Male
    @Constatine tissue level topic is interesting.

    And with last part you pointed to growth hormone increase in lifters?higher jaw...wider shoulders..?
     
  6. Constatine

    Constatine Member

    Joined:
    Sep 28, 2016
    Messages:
    1,777
    Gender:
    Male
    Growth hormone and more prevalent androgenic traits. There is a reason children who participate in football throughout their childhood and into adulthood are much more androgenic looking than life long gamers.
     
  7. OP
    Drareg

    Drareg Member

    Joined:
    Feb 18, 2016
    Messages:
    2,294
    Gender:
    Male
    It's probably converted into other androgens so appears low.
     
Loading...