Re: Re: Growth hormone and BFL

[Guest guest]

I'm totally fascinated by this. I was watching Body of Work the other day and I

was astonished by the skin texture of the older folks-- smooth and taut, like a

much younger person. I've never seen this in older people on other programs. It

makes total sense that it's because of growth hormone. And I bet it's just the

same in men.

Best Regards,

beth

Re: Growth hormone and BFL

Thanks Brett.

This can certainly add fuel to the fire regarding exactly which

regimens produce the best results. I also wonder how much of this is

transferrable to men.

Thanks,

Bruce

>

> Some more science behind BFL. I recently saw some studies that

show that performing successive sets before fully recovered (as in

BFL) induces growth hormone. Typically, strength increases are more

consistent with 3-5 minutes of rest and " full recovery " between

sets. I will post these studies later (if I can find them at home, I

delete everything here).

>

> I saw this study on another list, pasted below, that talks a little

bit more about growth hormone. -Brett

>

>

> Varying Weight Training Intensity Increases Growth Hormone In Women

> http://www.the- aps.org/press/ journal/06/ 25.htm

>

> Possible explanation for changes in muscle tone and metabolic

> function found

>

> BETHESDA, Md (Dec. 1, 2006) - Women who undertake a long-term weight

> training program produce more biologically active growth hormone, a

> finding that allows physiologists to understand why weight training

> improves muscle tone and optimizes metabolic function.

> A study published in the December issue of the American Journal of

> Physiology-Endocrin ology and Metabolism looked at different forms of

> growth hormone, used different testing methods, and varied weight

> training regimens. The research found that the role of growth

hormone

> in women's muscle development may be more complicated than

previously

> thought.

> " We found that growth hormone was responsive to moderate and heavy

> exercise regimens having 3-12 repetitions with varying weight

> loading, " said the study's principal author, J.

> Kraemer. " Women need to have heavy loading cycle or workout in their

> resistance training routines, as it helps to build muscle and bone. "

> The study, " Chronic resistance training in women potentiates growth

> hormone in vivo bioactivity: characterization of molecular mass

> variants, " was carried out by Kraemer, Jeff S. Volek, Barry A.

> Spiering and Carl M. Maresh of the University of Connecticut,

Storrs;

> Bradley C. Nindl, U.S Army Research Institute of Environmental

> Medicine, Natick, Mass.; O. Marx, The University of

> Pennsylvania, Philadelphia; Lincoln A. Gotshalk, University of

Hawaii

> at Hilo; Jill A. Bush, University of Houston, Texas; and Jill R.

> Welsch, M. Mastro and Wesley C. Hymer, The Pennsylvania State

> University, University Park, Penn. The The American Physiological

> Society published the study.

> Hormone comes in different forms

> Growth hormone, produced in the pituitary, plays an important role

in

> bone and muscle development, particularly in women. Men, on the

other

> hand, rely to a greater extent on muscle-building testosterone.

Since

> women rely on growth hormone to increase muscle and bone strength,

> the more growth hormone stimulated by a type of exercise, the better

> its outcome. Growth hormone also plays a role in fighting tissue

> breakdown, staving off stress fractures and improving metabolic

> function.

> The growth hormone molecule is composed of 191 amino acids, but

> sometimes the molecules break apart to form smaller pieces. Other

> times these smaller pieces join together into larger pieces,

> including pieces that are larger than the original molecule. In

> addition, growth hormone can attach to binding proteins. It has been

> shown that there are more than 100 variants of the growth hormone

> molecule.

> This study looked at growth hormone variants using two different

> tests that measured an immune response, known as immunoassays.

> Immunoassays are the tests physiologists have traditionally used in

> such studies. The researchers added a third test, the tibia line rat

> growth assay, to detect the biological action of the hormones, a

> novel approach to the study of growth hormones in exercise.

> Type of growth hormone varies with exercise

> The researchers divided the participants into two groups: an upper

> body training group and a total body training group. The two groups

> were then subdivided: Half used heavier weights with fewer

> repetitions (up to eight) while the other half used lighter weights

> with a greater number of repetitions (up to 12).

> The researchers took blood samples before and after the initial

> training (acute exercise) session that all participants did as the

> start of the study. They also obtained blood samples before and

after

> the final training session 24 weeks later (chronic exercise). One of

> the unique aspects of the study was that it continued over a

> relatively long time.

> The researchers made these findings:

>

> · The presence of growth hormone varied with the training regimen.

> · The presence of growth hormone varied with the test used to detect

> it. This suggests that pituitary function and the release of

> different sizes of growth hormone is altered with weight training.

> · The body can adapt and produce more or less of certain sizes of

> growth hormone with weight training. In this study, the larger sized

> growth hormone variants appear to increase with heavy resistance

> training.

>

> " This study shows that not every form of growth hormone responds in

> the same way, but is dependent upon the exercise protocol, " Kraemer

> explained. " This may forever change the way we look at growth

hormone

> in the circulation with exercise and training. "

>

>

>

>

>