Training legs multiple times per week with 8-10 reps at 75-80% of 1 rep max may increase androgen receptor density.

“the effects of sequential balance of resistance exercise on Androgen receptor expression so it does appear from this 2004 article that if you do sequential bouts of heavy resistance exercise you can increase total serum testosterone and you can increase Androgen receptor mRNA and protein expression that appears to correspond to subsequent increases in myofibular protein what do they do in the study they do three sets of eight to ten repetitions at 75 to 80 one rep max using the squat leg press and leg extensions versus a control that didn't know exercise resistance”