Adding Muscle While Increasing Endurance

I want to grow muscle while increasing my endurance, I know the two don’t commonly go hand in hand however I’m not trying to get swollle and I am considering the aid of supplements.

I’ve herd lots about sarms however I’m not huge on the lack of data.

If anything. Trt, peptides or whatever I don’t know anything about this world and I’d like some help.

Thanks!

they do. if you increase your work capacity you can train harder, longer, heavier

my experience was waste of time and money.

what are your goals?
stats ht, wt, age, a pic
how do you train?
how is your nutrition?

this is a treatment for a condition, not something you just decide to do.