T
truecel12
hgh at 5'10 14
- Joined
- Oct 2, 2023
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- Reputation
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this study finds that weight training lowers igf1
"Subsequent analysis of the relationship between participants' age with plasma IGF-1 alterations revealed a U shape correlation in non-liner dose response, in which resistance training resulted in a declined IGF-1 level up to 40 years of age."
https://www.tandfonline.com/doi/full/10.1080/13685538.2020.1801622
"However, significantly lower insulin-like growth factor 1 was observed in subjects younger than 60 years (OR, −4.80; 95% CI, −7.74 to −1.86, p=.001)"
this one finds hypertrophy training reduces igf1 receptor expression
but an increase in igf1 / gh??
it lowered testosterone, and the igf1bp3 levels stayed the same.
does hypertrophy seriously stunt growh?
The effect of resistance training on serum insulin-like growth factor 1(IGF-1): A systematic review and meta-analysis - PubMed
We have successfully demonstrated that resistance training was associated with an increased IGF-1 level among those who received the training for ≤16 weeks, among participants older than 60 years old, and among women. Further studies are warranted to clarify the mechanisms underlying the...
pubmed.ncbi.nlm.nih.gov
https://www.tandfonline.com/doi/full/10.1080/13685538.2020.1801622
"However, significantly lower insulin-like growth factor 1 was observed in subjects younger than 60 years (OR, −4.80; 95% CI, −7.74 to −1.86, p=.001)"
this one finds hypertrophy training reduces igf1 receptor expression
but an increase in igf1 / gh??
it lowered testosterone, and the igf1bp3 levels stayed the same.
Muscle hypertrophy training does not suppress the GH/IGF axis in young adult males - PubMed
The resistance training protocol prescribed for muscle hypertrophy did not suppress the GH-IGF-I axis, but it did cause alterations in IGF-1r gene expression and in IGF-I kinetics compatible with increased IGF bioactivity.
pubmed.ncbi.nlm.nih.gov