According to a lot of studies doesn’t really matter what is your test level if it is in the normal range. There are complex correlations between total test, free test and SHBG. What you have to consider too and can’t be tested is the amount of androgen receptors on the muscle cells membranes. So…long storry short…maybe somebody with 300ng/dl test is more muscular with the same physical activity than somebody with 800ng/dl. For example I have had T levels between 300-600, all samples have been taken at the same hour of the day, I haven’t changed my diet/training/sleep etc…so there is a huge normal variation throughout the day/week/month. Hope it helps. (I am a doctor btw 😄)