Does it matter whether or not I inject in the same muscle every time?

Pacman

Active Member
I inject twice weekly, sometimes more if I divide it up into smaller doses. Is there any sense in purposely injecting in different muscles, other than simple soreness? More effective one way or another?
 
When I injected twice a week, I only injected in my shoulders. I never felt that I needed to rotate to a different location. I've never been worried or concerned about scar tissue.
 
I've read that deltoids absorb more slowly, I've no idea if there is anything to that or if its complete bro science. I personally have never noticed a difference between any sites in how I felt. All mine are shallow IM though.
 
I've been injecting mostly in the ventro-glute, so is it okay if I do in the same one every time?

Why wouldn't it be OK? Fact is is that if you can reach a spot, you can inject there, makes perfect sense to rotate a bit but is there any harm in the same spots? Generally not, but then generally not adivsed either...as in....opinions vary.
 
I think it is free insurance in my opinion to rotate sites. After 10-20 years injecting in the same site you never know what can happen. Everytime you inject you cause a little bit of irritation in the site. That irritation over and over again in the long term can have unwanted results. It doesn’t cost anything to rotate and it is very easy to do. And you are not traumatizing the same area over and over again.
 

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Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

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Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

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The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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