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-   -   Stress affecting growth (http://www.catalystathletics.com/forum/showthread.php?t=4681)

Greg Davis 09-19-2009 11:54 AM

Stress affecting growth
 
Somatomedin and growth hormone in psychosocial dwarfism.

Saenger P, Levine LS, Wiedemann E, Schwartz E, Korth-Schutz S, Pareira J, Heinig B, New MI.
The diagnosis of psychosocial dwarfism (PSD) was made in a 7 year old boy upon admission to the hospital. In the period following admission, he grew at a slightly accelerated rate of 0.6 cm in 24 days (extrapolated growth rate--9.1 cm/yr); his caloric intake was 1663 calories/day (147 cal/kg/day), stimulable growth hormone was 5.9 ng/ml and somatomedin activity was in the hypopituitary range (0.24, 0.05 U/ml). In the following period of marked catch-up growth of 8.6 cm in 102 days (extrapolated growth rate 30.8 cm/yr), his caloric intake decreased significantly to 1514 cal/day (106 cal/kg/day, 0.005 less than p less than 0.01), stimulable growth hormone in this period was 13.6 ng/ml and somatomedin activity normalized (0.98 U/ml). While under continued observation, with separation from his favorite nurse, his growth velocity dropped significantly to the rate immediately following admission, but there was no change in his stimulable growth hormone or in somatomedin activity. With the return of his favorite nurse, he resumed his previous rapid catch-up growth with no change in caloric intake (p equals not significant), growth hormone level, or somatomedin activity. Upon transient return to his depriving home, his growth rate decreased to 1.4 cm in 70 days (extrapolated growth rate 7.2 cm/yr); growth hormone remained in the normal range. Somatomedin activity was in the low normal range (0.57 U/ml) and rose to high normal activity (1.31 U/ml) as rapid catch-up growth resumed after he had been readmitted. We conclude from these data that: 1. Serum somatomedin in longstanding untreated PSD may be in the hypopituitary range. 2. Markedly fluctuating growth rates during recovery in this patient with PSD were not due to changes in caloric nutrition, growth hormone release or somatomedin activity, but to an as yet unidentified factor affecting growth during emotional stress.

I posted briefly about this on my homepage but thought I'd post the study abstract here. Seems to suggest that stress can have a very significant effect on attempts to gain weight.

Steven Low 09-19-2009 03:43 PM

Probably has something to do with the placebo effect as well.

Omar Omar 10-12-2009 06:21 AM

wow man. Thanks for sharing that... :D

Mike ODonnell 10-12-2009 10:50 AM

Stress can lead to more issues with insulin sensitivity (key for insulin to help transport nutrients across muscular cell membranes for repair/building) and cortisol (which can in turn lower GH and other anabolic hormones). Not good....hence why I said in a recent article, the best way to gain muscle IMO is doing more walking! (great mental stress reliever and keeps the body more in a state of recovery than ongoing stress compared to more intense cardio)


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